Features: Adopting power amplifier inductors, highs current, low magnetic loss, low heat generation, to improve sound quality; The magnetic shieldings mechanism is resistant to electromagnetic interferences. QCC3034, supporting transmission. QCC3034+PCM5102A, losslesstransmission, losslessdecoding, not loss, perfectly displaying the dynamics and details of sound, without burrs at highs frequency, powerful at low frequency. Extremely highs parameters performances: dynamic 112dB, signal-to-noise ratios 112dB, distortions level -93dB. Equipped with protections mechanism, input undervoltage, input antireverse connection, overheating, overcurrent, and shortcircuit protections. Specifications: Type:Without Housing,With Housing,Cable Version Working Voltages:12-30VDC Maximums power: left , right channel—— 105W@30V , 4Ω; 55W@30V , 8Ω. Subwoofer—— 208W@30V 2Ω; 105W@30V , 4Ω. In short Speaker: left and right channel, supporting speaker up to 3-8ohms and 100W; The subwoofer supports 2-8ohms and speaker up to 200W. Chip: QCC3034, transmission distance of 15meters. Number of channel: 2.1, left and right channel+subwoofer Power amplifier chip: TPA3221 Protections mechanism: Input undervoltage, input antireverse connection, overheating, overcurrent, shortcircuit protections. Size:Approx.118mm/4.64''x100mm/3.94''x25mm/0.98'' Package Includes: 1x Power Amplifier Board note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.