Teledyne Acoustic Research P-10 High Output Stereo power Amplifier. The Acoustic Research P-10 is 120 watt per channel, stereo power amplifier. Power output: 120 watts per channel into 8? Frequency response: 20Hz to 20kHz. Total harmonic distortion: 0.02%. Signal to noise ratio: 120dB. Dimensions: 430 x 110 x 365mm.