The amplifier board features and high frequency, which has stable performance.Adopting class D intelligent chip, the amplifier board has pure and dynamic sound effect.Made of metal and plastic, the amplifier board is -friendly and durable to use.The length of the amplifier board is 11cm, width is 7cm and thickness is 3.5cm.The amplifier board is suitable for being used in speaker, radio and so on.Item Name: Amplifier BoardModel: TPA3255Working : Class DStandby Current: 80mAWork Efficiency:.more than the 90%Channel: 2.0Quiet/Mute: Short-circuit Mute FunctionOutput Power:315W/4 ohm, Distortion 10%185W/8 ohm, Distortion 10%260W/4 ohm, Distortion 1%150W/8 ohm, Distortion 1%Frequency Response: 20Hz to 20KHzDynamic Range: more than the 100 dBSignal to Noise : more than the 111dBWorking Voltage: DC24-40V Switching Power Supply(Recommended 36V)2 Audio Operational Amplifiers: NE5532PFeatures: Intelligent Chip, Effect, LightweightColour:As shownMaterial:pcbPackage Contents:1 * Amplifier BoardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.