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>