aiyima a07 tpa3255 power amplifier 300wx2 hifi class d stereo digital audio amp 2.0 channel amplifier for passive speaker home audio (a07+dc 32v power adapter) aiyima the dual 300w shocking bass output is compatible with passive stereo speakers of most sizes and impedance specifications.<br> texas instruments tpa3255, digital audio amplifier btl bridge power output 300w * 2 channel design, thd less than 0.03% when working continuously<br> amplifier chip: tpa3255<br> output power: 300w+300w<br> number of channels: 2.0 channels/stereo<br> power supply: dc24-48v (outer diameter 5.5mm inner diameter 2.5mm)<br> recommend dc48v 5a power adapter<br> impedance: 4-8 ohm<br> size:151*100*33mm<br> <b>package included:</b><br> 1pc tpa3255 digital audio amplifier<br>