The 12 volts in the promised performance can not be achieved is actually clear to everyone. But this device has circuitry not 2 push-pull powered amplifiers per channel but works (via capacitor) to ground and thus can only max. Generate 5.5V peak, ie 3.9 volts rms. into 4 ohms, makes only 3.8 watts - theoretically. Lee (h) rgeld paid.