Item Type: Digital Amplifier Board <br>Material: PCB <br>Adaptive Power Supply: Working voltage range 18-50VDC, limit 53V <br>It is recommended to use a DC power supply with a voltage of 36-48V and a current of more than 12A <br>Maximum Power: <br>Left and right channels: 300W at 50V, 4Ω; 160W at 50V, 8Ω <br>Subwoofer: 600W at 50V, 2Ω; 300W at 50V, 4Ω; 160W at 50V, 8Ω <br>In short, the higher the voltage, the smaller the resistance and the greater the output power <br>Bluetooth Chip: JL 5.1, transmission distance of 15 meters <br>Input Method: BT, AUX, U disk or sound card <br>Number of Channels: 2.1, left and right channels and subwoofer <br>Power Amplifier Chip: 2 original for TPA3255 <br>Protection Mechanism: Input undervoltage, overheat, overcurrent, short circuit protection. No input prevent reverse protection <br>Total Output Power When Total Harmonic Distortion + Noise Is 10%: <br>315W 4Ω, BTL stereo configuration <br>185W 8Ω, BTL stereo configuration <br>600W 2Ω, PBTL mono configuration <br>Total Output Power At 1% Total Harmonic Distortion + Noise: <br>260W 4Ω, BTL stereo configuration <br>175W 3Ω, BTL stereo configuration <br>285W 2Ω, PBTL mono configuration<br>1、EXCELLENT SOUND QUALITY WITHOUT DISTORTION: Using two for TPA3255 power amplifier chips, the digital amplifier board is a high performance Class D power amplifier that deliver truly high end sound quality. Featuring an advanced integrated feedback design and proprietary high speed gate driver error correction (PurePathTMHD), the device maintain ultra low distortion across the entire audio band while delivering high definition sound quality <br>2、EXCELLENT PERFORMANCE: Digital amplifier board adopt thickened heat sink, quiet, long life fan, which first solve the problem of heat dissipation and give full play to the advantages of high power. With six for Nichicon green coat HIFI electrolysis, the sound is transparent, low frequency response is fast, medium frequency texture is strong, high frequency is smooth, and tangential loss is minimal. The six for JRC2068 amplifiers feature extremely low noise, possess pure sound quality and extremely low distortion <br>3、EXCELLENT INDUCTANCE: Amplifier board subwoofer use four high power digital AMP special inductors, possess large current, low magnetic loss, small parasitic capacitance, low heat, using anaerobic copper wire to improve sound quality; The magnetic shielding mechanism has strong EMI resistance <br>4、SHIELDING SIGNAL: The outer winding shielding of bluetooth amplifier board adopt high density environment friendly tinned copper wire with high density, which play a good shielding effect on the connection signal. Low floor noise, not affected by direct contact or radiation signals <br>5、ADJUSTABLE GAIN: Digital amplifier board bluetooth multi level amplification can ensure the signal strength, enough output power, but also fine tune the gain difference between the left and right channels; Change the R, L resistance to change the gain, the greater the resistance value, the greater the gain. for Five Fingers Audio APP support for Android and for iOSPositive and negative terminals can not be reversed!<p>1 x Motherboard</p><p>5 x Knob Key</p><p>5 x Nut</p><p>5 x Gasket</p><p>2 x Audio Adjustment Connector</p>