Get DIY LM3886 Power Amplifier Board Kit DC Servo 5534 Independent Operational Amplifier Module Feature: Supply voltage: allowable range between 15V and double 28V (refers to the transformer output voltage, such as 25-0-25) Board size: 155mm*80mm Load impedance: 4-8Ω Output power: Max 68W+68W Package includes: 1 x LM3886 Power Amplifier Board DIY LM3886 Power Amplifier Board Kit DC Servo 5534 Independent Operational Amplifier Module See detail