ZK-TB21 High Power Amplifier Board 2.1 Channel Bluetooth Digital Amplifier Board

I love this product . Only problem is mount in amplifier case .

Amazing thing

Best Quality sound quality is best quality wise very very nice quality subwoofer is very good

Esta muy bien, de calidad de audio pasable pero hay que ponerle una fuente de 24 v y 5 Amp para que funcione bien, si se le pone uno mas pequeño distorsiona mucho.

Works really well for the price. Was hard to find a 2.1 amp with a powered sub connection since they all have LFE sub out and cost twice as much as this. Works perfectly, just need to keep the volume knob less than 50% otherwise I get lots of background static. But even at that level, its plenty loud, could be because I'm using 8ohm bookshelf speakers. I love the fact it has individual control for sub freq/vol and L/R treble/bass as well. All these features in an amp this cheap/small is impossible to find these days.

Do it yourself assembly. Fun, and functional. Thanks!

Really impressive for the price and size. Just pretend the volume knob only turns about 3/4 of the way to max and you'll love it. Anything past 3/4 and it starts to distort. More volts is better but 12 volt works. I have it running two 6.5 speakers and a 10" JBL sub on a 16V battery and it goes all day even cranked. My little boom box compares well against a jbl partybox 320, especially outside.