["Volume Control & BTL: SMSL amplifier uses the Japanese NJRC company's NJW1194 electronic volume control chip. This precision chip delivers accurate volume control and ultra-low distortion ensuring pure unaltered sound quality. It is a powerhouse amplifier that utilizes the latest BTL (Bridge-Tied Load) technology ensuring top-notch quality exceptional efficiency and minimal energy consumption." "SMSL A300 Amplifier: The Audio amp uses German Infineons new digital high-power amplifier chip MA5332MS has high efficiency and low energy consumption. The stereo mono amplified mode has a powerful output power rating of up to 165W in a 4Ω load. Even with a high impedance load of 8Ω the A300 produces 85W of clean power per channel. Make the sound clearer fuller and more textured." Multiple Input Terminals:Bluetooth amplifier supports RCA USB bluetooth 5.0 input.Wireless bluetooth 5.0 reception better sound quality and stable signal. Bluetooth amplifier is suitable for smartphones tablets and other device connections. A large number of audiophile-grade audio components are used to improve the subjective sense of hearing. Can Form A 2.1 Audio System: With a dedicated subwoofer signal pre-output connecting an active subwoofer to form a 2.1 system is made effortless. 8 preset EQ options and treble/bass adjustment for easy matching of a variety of speakers and music. The built-in SMSL SDB patented sound and treble/bass adjustment provide unprecedented flexibility in matching this amplifier with a wide variety of speakers and music types. "Desktop Audio Amplifier: Crafted from aluminum alloy and precision CNC-processed the A300s shell features anodizing technology and chamfering processing resulting in an exquisite finish with a delicate touch. The A300s thoughtful design and practical features make it an audiophiles dream come true. The user-friendly operating system is intuitive and easy to understand complete with a full-featured remote control function for added convenience."]