Recommended with Single 10-12 inch 250W-300W subwoofer speaker<br> The 350W subwoofer power amplifier board uses the disassembled tube and has a very high signal-to-noise ratio.<br> No noise can be heard without plugging the input line.It also has full relay protection,such as power-on delay,DC output,horn short circuit,etc.<br> The whole body adopts the front and rear stage split design,which is convenient for DIY installation,and the pre-stage low-frequency processing capability is strong.<br> Can be used with a variety of low speakers,connected to passive speakers can be used.<br> Model Number:350W Subwoofer Amplifier Board<br> Channels:1<br> Working voltage:double AC24-28V<br> Output power:350W<br> Chip type:Sanken<br> Channel type:Mono<br> Colour:Green<br> Material:PCB+aluminum+components<br> Package Contents:<br> 1 * Subwoofer Amplifier Board with cable<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.