Feature:1. Original TPA3255: Using the original TPA3255, possess high performance and class D efficiency, which can bring real high end sound quality2. High Performance Audio Operational Amplifiers: The computing end uses a replaceable DIP-8 op ampx2, and buyers can upgrade the computing model by themselves. This product uses 2 for TI high performance audio operational amplifiers NE5532P3. Audio Input Coupling Capacitors: The main filter electrolytic capacitor adopts for Nichicon capacity 2200UF/63V x 2, 6 for Nichicon FW series 25V 10UF golden audio input coupling capacitors. Other filter capacitors use for Nichicon series4. For SAGAMI 7W14A Inductor: Audio digital class D amplifier uses for SAGAMI 7W14A inductor to ensure clear and strong sound5. Ultra Low Distortion: The device has an advanced integrated feedback design and a proprietary high speed gate driver error correction function (PurePath Ultra HD), this technology allows the device to maintain ultra low distortion throughout the audio frequency band while exhibiting perfect sound qualitySpecification:Item Type: 2.0 Digital Amplifier BoardMaterial: Aluminum alloy + PCBModel: TPA3255Working Method: Class DStandby Current: 80mAWork Efficiency: > 90%Channel: 2.0Rest or Mute: Short circuit mute functionOutput Power: 315W /4, distortion 10%185W /8, distortion 10%260W /4, distortion 1%150W /8, distortion 1%Frequency Response: 20Hz to 20KHzDynamic Range: > 100dBSignal to Noise Ratio(SNR): > 111dBWorking Voltage: DC24-48V switching power supply(recommended voltage 36V).Package List:1 x 2.0 Digital Amplifier Board1 x Signal LineNote:The indicator light works normally, if the circuit board fails or the temperature is too high, the corresponding LED light will turn off as a warning.