{"product_id":"douk-audio-st-02-hifi-integrated-bluetooth-tube-amplifier-multi-color-vu-meter-stereo-vacuum-tube-amp-for-home-audio-system","title":"Douk Audio ST-02 HiFi Integrated Bluetooth Tube Amplifier, Multi‑Color VU‑Meter Stereo Vacuum Tube Amp for Home Audio System","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eDouk Audio\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eControl Method\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003ePush button,Remote,Touch,Others\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMaterial\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003ePlastic,aluminum,Metal,others\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMaximum Power Per Channel\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eAbove 200W\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eST-02\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOutput Power\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e300W\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePackage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSurround sound channel configuration\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eOthers\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003cul class=\"sc-lheWVM dDPCjL pf-190_\" data-pf-type=\"List2\" style='box-sizing: border-box; margin: 0px; padding: 10px; list-style-position: inside; list-style-type: disc; width: 1266px; flex-basis: unset; height: fit-content; font-size: 18px; line-height: 30px; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; --pf-line-spacing-xs: 20px; --pf-line-spacing-sm: 20px; --pf-line-spacing-md: 30px; --pf-line-spacing-lg: 30px; --pf-text-indent-xs: 0px; --pf-text-indent-sm: 0px; --pf-text-indent-md: 0px; --pf-text-indent-lg: 0px;'\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-191_ pf-text-1\" data-pf-type=\"List2.Item2\" style='box-sizing: border-box; list-style: inherit; margin: 0px 0px 30px; font-weight: 400; font-family: \"G OTF KSHINGOSTD MEDIUM\"; line-height: 30px;'\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eA More Complete HiFi Amp: Evolved from the proven ST-01 PRO and refined around real HiFi needs, ST-02 combines a DAC, stereo amplifier, and headphone amplifier in a single unit. Bluetooth 5.4, PC-USB, optical, coaxial, and RCA cover both digital and analog sources, with direct lossless playback from USB drives.\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-193_ pf-text-1\" data-pf-type=\"List2.Item2\" style='box-sizing: border-box; list-style: inherit; margin: 0px 0px 30px; line-height: 30px; font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-weight: 400;'\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003ePower Meets Precise 2.1 Control: TPA3255 delivers up to 300W×2 for strong drive with 4–8Ω passive speakers. Post-Filter Feedback (PFFB) keeps frequency response more consistent across speaker loads. Adjustable 20–230Hz HPF reduces deep-bass load on the mains, while a 150Hz LPF SUB OUT feeds a powered subwoofer for cleaner, better-integrated 2.1 sound.\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-195_ pf-text-1\" data-pf-type=\"List2.Item2\" style='box-sizing: border-box; list-style: inherit; margin: 0px 0px 30px; line-height: 30px; font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-weight: 400;'\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eTube Warmth Meets Dynamic VU: A custom ECC83 tube stage adds classic warmth and texture, while 180V high-voltage operation keeps musical dynamics more composed. Large VU meters make every swing visible, with AGC adapting meter sensitivity across signal levels, while 34 backlight colors and 10 brightness levels let the display fit your setup.\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-197_ pf-text-1\" data-pf-type=\"List2.Item2\" style='box-sizing: border-box; list-style: inherit; margin: 0px 0px 30px; line-height: 30px; font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-weight: 400;'\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eMore Freedom to Shape Your Sound: Fine-tune bass and treble ±9dB to suit your speakers, room, and music, or switch to BYPASS for a more direct signal path. Four socketed NE5532 op-amps open up more room for sonic exploration, while 3.5mm\/4.4mm headphone outputs and switchable headphone\/speaker modes keep listening flexible.\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-199_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px; line-height: 30px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eMore Thought in Every Detail: The high-clarity TFT keeps key status easy to read, while top controls, remote, and WeChat Mini Program put everyday adjustments within easy reach. Selected audio components and a low-noise power design support clean, stable performance, while the metal chassis adds lasting solidity and a premium feel. \u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e \u003cstrong\u003e\u003cbr\u003e\nParameters\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\n\n\u003cul class=\"sc-lheWVM dDPCjL pf-202_\" data-pf-type=\"List2\" style='box-sizing: border-box; margin: 0px; padding: 10px; list-style-position: inside; list-style-type: disc; align-self: stretch; height: fit-content; width: unset; flex-grow: unset; flex-basis: unset; line-height: 30px; font-size: 18px; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; --pf-line-spacing-xs: 10px; --pf-line-spacing-sm: 10px; --pf-line-spacing-md: 10px; --pf-line-spacing-lg: 10px; --pf-text-indent-xs: 0px; --pf-text-indent-sm: 0px; --pf-text-indent-md: 0px; --pf-text-indent-lg: 0px;'\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-203_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-205_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eModel: ST-02\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-207_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eAudio Inputs: Bluetooth 5.4 \/ PC-USB \/ Coaxial \/ Optical \/ RCA \/ U-Disk\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-209_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eAudio Outputs: Speaker Output \/ SUB OUT \/ 3.5mm and 4.4mm Headphone Outputs\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-211_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px; line-height: 30px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eMaximum Output Power: 300 W × 2 @ 4 Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-213_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px; line-height: 30px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eSpeaker Impedance: 4–8 Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-215_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eSNR: ≥ 103 dB\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-217_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px; line-height: 30px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eTHD+N: 0.02%\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-219_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 11px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eFrequency Response: 20 Hz–20 kHz (±0.5 dB)\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-221_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eRCA Input Sensitivity: 2 V\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-223_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px; line-height: 30px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eBass \/ Treble Adjustment: ±9 dB\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-225_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px; line-height: 30px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eHPF Frequency Range: 20 Hz-230 Hz\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-227_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eSUB OUT Low-Pass Filter: 150 Hz\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-229_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eSupported Sampling Rates:\u003cbr style=\"box-sizing: border-box;\"\u003e\n      PC-USB: Up to 96 kHz \/ 24-bit\u003cbr style=\"box-sizing: border-box;\"\u003e\n      Bluetooth\/U-Disk: Up to 48 kHz \/ 24-bit\u003cbr style=\"box-sizing: border-box;\"\u003e\n      Coaxial \/ Optical: Up to PCM 192 kHz \/ 24-bit\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-231_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003ePC-USB Supported Systems: Windows 10\/11, macOS, Android, iOS, HarmonyOS\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-233_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eSupported U-Disk Formats: MP3 \/ WAV \/ FLAC \/ APE\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-235_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eMaximum U-Disk Capacity: 32 GB\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-237_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eMaximum Headphone Output: 130mW \/ 32Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-239_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eHeadphone Impedance: 16–300Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-241_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eVU Meter Adjustment: 34 Colors \/ 10 Brightness Levels\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-243_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003ePower Input: DC 24-48V \/ ≥ 5A, 5.5 × 2.5 mm\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-245_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eDimensions (W × D × H): 210 × 97 × 82 mm \/ 8.27 × 3.82 × 3.23 in   \u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-247_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eNet Weight: 1.21 kg \/ 2.67 lb   \u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-249_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003ePackage Weight: 2.01 kg \/ 4.63 lb\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"sc-kJpDiM pf-251_\" data-pf-type=\"Custom.HTML\" style='box-sizing: border-box; width: 1266px; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 19.2px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cdiv class=\"st02-power-wrap\" style=\"box-sizing: border-box; width: 1266px; overflow-x: auto; background: rgb(255, 255, 255);\"\u003e\n\u003cdiv class=\"st02-power-title\" style=\"box-sizing: border-box; font-size: 18px; font-weight: 600; line-height: 1.5; color: rgb(34, 34, 34); margin-bottom: 14px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003ePower Output Table of ST-02\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\n\u003ctable class=\"st02-power-table\" style=\"box-sizing: border-box; width: 1266px; border-collapse: collapse; border-spacing: 0px; background: rgb(255, 255, 255); font-family: Arial, sans-serif; font-size: 14px; color: rgb(34, 34, 34);\"\u003e\n\u003cthead style=\"box-sizing: border-box;\"\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003cth style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important; font-weight: 600; width: 421.656px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003ePower Supply\u003c\/span\u003e\u003c\/span\u003e\u003c\/th\u003e\n\u003cth style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important; font-weight: 600; width: 421.656px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eSpeaker Impedance\u003c\/span\u003e\u003c\/span\u003e\u003c\/th\u003e\n\u003cth style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important; font-weight: 600; width: 421.688px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003eRated Output Power\u003c\/span\u003e\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody style=\"box-sizing: border-box;\"\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd rowspan=\"3\" style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e36V\/6A\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e4Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e107W+107W\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e6Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e100W+100W\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e8Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e94W+94W\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd rowspan=\"3\" style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e48V\/5A\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e4Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e120W+120W\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e6Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e110W+110W\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e8Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e102W+102W\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd rowspan=\"3\" style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e48V\/10A\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e4Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e250W+250W\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e6Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e210W+210W\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e8Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border: 1px solid rgb(184, 184, 184); padding: 7px 10px; text-align: left; vertical-align: middle; background: rgb(255, 255, 255) !important;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e185W+185W\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e\u003cbr\u003e\n\u003cstrong\u003ePacking List\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\n\n\u003cul class=\"sc-lheWVM dDPCjL pf-254_\" data-pf-type=\"List2\" style='box-sizing: border-box; margin: 0px; padding: 10px; list-style-position: inside; list-style-type: disc; font-weight: 400; font-family: \"G OTF KSHINGOSTD MEDIUM\"; width: 1266px; flex-basis: unset; height: fit-content; line-height: 30px; font-size: 18px; color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; --pf-line-spacing-xs: 10px; --pf-line-spacing-sm: 10px; --pf-line-spacing-md: 10px; --pf-line-spacing-lg: 10px; --pf-text-indent-xs: 0px; --pf-text-indent-sm: 0px; --pf-text-indent-md: 0px; --pf-text-indent-lg: 0px;'\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-255_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e1 × ST-02\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-257_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e1 × ECC83 Tube\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-259_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e1 × DC 36V\/6A Power Adapter  (Optional)\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-261_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e1 × Remote Control (Without Batteries)\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-263_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e1 × Bluetooth Antenna\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-265_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e1 × Optical Cable\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-267_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px 0px 10px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e1 × USB-A\/C to USB-C Cable\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"sc-hoHvKZ beblVV pf-269_ pf-text-1\" data-pf-type=\"List2.Item2\" style=\"box-sizing: border-box; list-style: inherit; margin: 0px;\"\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e1 × User Manual\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e \u003cstrong\u003e\u003cbr\u003e\nFAQs\u003c\/strong\u003e\u003cbr\u003e\n\u003cbr\u003e\n\u003cstrong style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003eQ: What should I know before using BYPASS mode?\u003c\/strong\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cspan style=\"color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;\"\u003eA: In BYPASS mode, the input signal passes through the ST-02 at maximum level. Before enabling BYPASS, lower the volume on your source device to avoid a sudden increase in volume that may damage your hearing or speakers.\u003c\/span\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cstrong style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003eQ: Can the 3.5mm and 4.4mm headphone outputs be used at the same time?\u003c\/strong\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cspan style=\"color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;\"\u003eA: For the best listening experience, we recommend using only one headphone output at a time.\u003c\/span\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cstrong style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003eQ: Why does the ST-02 automatically switch inputs when I insert a USB drive?\u003c\/strong\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cspan style=\"color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;\"\u003eA: When a USB drive is inserted, the ST-02 automatically switches to U-disk input. To use another source, simply select the desired input again with the input control.  \u003c\/span\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cstrong style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003eQ: Can the op-amps be replaced?\u003c\/strong\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cspan style=\"color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;\"\u003eA: Yes. The ST-02 uses 4 socketed op-amps, compatible with common dual op-amps such as OPA2604, OPA2134, and MUSES01. Two of the four sockets also provide sufficient clearance for larger Sparkos and Burson discrete op-amps. \u003c\/span\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cstrong style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003eQ: Can the vacuum tube be replaced?\u003c\/strong\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cspan style=\"color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;\"\u003eA: Yes. The ST-02 uses an ECC83 tube tube for both stereo channels and is compatible with models such as 12AX7-S, 12AX7B, 7025, and 12AX7. Always turn off the power before replacing the tube.\u003c\/span\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cstrong style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003eQ: What power supply does the ST-02 require?\u003c\/strong\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cspan style=\"color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;\"\u003eA: We recommend using the supplied DC 36V\/6A power adapter. If using another power supply, choose a high-quality DC 24–48V \/ ≥5A adapter rated at 5A or higher.\u003c\/span\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cstrong style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003eQ: Can I control the ST-02 from my phone?\u003c\/strong\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cspan style=\"color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;\"\u003eA: Yes. Open WeChat and search for “多客音频” to access the Mini Program and control the ST-02 from your phone.\u003c\/span\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cstrong style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003eQ: Are batteries included for the remote control?\u003c\/strong\u003e\u003cbr style='box-sizing: border-box; color: rgba(18, 18, 18, 0.75); font-family: \"G OTF KSHINGOSTD MEDIUM\"; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;'\u003e\n\u003cspan style=\"color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;\"\u003eA: No. For shipping safety, the remote control does not include batteries. Please prepare 2 × AAA batteries separately.  \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\n\n\u003cp style=\"text-align:left;margin:0;\"\u003e\u003cimg cke-id=\"img33\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S5f2778eb756740458136d060d7795e52D.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\"\u003e\u003cimg cke-id=\"img34\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S92bec6f66d3d4754add0ffca120b9874S.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\"\u003e\u003cimg cke-id=\"img35\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sfe5d82e6d65042298546f86dbedd57afX.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\"\u003e\u003cimg cke-id=\"img36\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sb5719b6a617b45a1b5685c82e89e8e87i.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\"\u003e\u003cimg cke-id=\"img37\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S45f8509e76f34f68b0544340ede7451eb.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\"\u003e\u003cimg cke-id=\"img38\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S0095e06c8a2a4eda842f4f167f2e2d47d.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\"\u003e\u003c\/p\u003e\n\u003cspan style=\"font-size:20px;\"\u003e\u003cspan style=\"font-family:Times New Roman,Times,serif;\"\u003e\u003cspan style=\"color: rgba(18, 18, 18, 0.75); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.72px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;\"\u003e\u003c\/span\u003e \u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\u003c\/div\u003e\r\n","brand":"K1 CAR FACTORY ","offers":[{"title":"Without Power Supply","offer_id":67435335581771,"sku":"14:4#Without Power Supply","price":5132.0,"currency_code":"HKD","in_stock":true},{"title":"With Power Supply","offer_id":67435335614539,"sku":"14:193#With Power Supply","price":5840.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/9137\/3131\/files\/Sc382fbd19d61477dac5e9073b1c20f37d.webp?v=1794225862","url":"https:\/\/k1-gadget.myshopify.com\/products\/douk-audio-st-02-hifi-integrated-bluetooth-tube-amplifier-multi-color-vu-meter-stereo-vacuum-tube-amp-for-home-audio-system","provider":"K1 CAR FACTORY ","version":"1.0","type":"link"}