RingBuu TDA7377 Power Amplifier 2.1 DIY kit 3 Channel Sound Audio AMP Board 12-18V DC

? Heavy bass 20W 4-6 inch 4-8 European 10-40W subwoofer
? The main channel 10W + 10W 3-5 4-8 Euro 10-30W inch full-range or high bass speakers
? Recommended transformer voltage DC 12-18V, the battery can also be
? We recommend 2-4-inch full-range bass 4-6 inches is more appropriate choice with inappropriate or horn speaker box is not even installed it certainly is not effective
? Sealed box maze conditional use, wall paste sound-absorbing cotton, can be obtained relatively pure solid bass