[High Quality Chipset: AO200MKII has MA5332MS Amplifier Chip (higher quality with high efficiency and low energy consumption) NJW1194 Volume Control Chip and OPA1678 OPA Chip 160Wx160W Output Power: SMSL AO200 MKII supports 160Wx2 (4Ω) and 85Wx2 (8Ω). It is also equipped with CNC precision machining to produce higher quality sound with excellent exterior design Balanced Input Design: The balanced structure can reduce all kinds of noise in the transmission process so that the front-end can play a better performance and avoid the waste of performance in the transmission process Subwoofer Signal Output: SMSL AO200 MKII with subwoofer signal pre-out easy to connect the active subwoofer to form a 2.1 system. It still supports active speaker output Built-In EQ Sound: SMSL AO200 MKII is built-in SMSL SDB patented sound and treble/ bass adjustment for easy matching of a variety of speakers and music If you have any questions during use AOSHIDA will quickly guide you to solve them]