ADCOM GTP-602 STEREO TUNER / PRE-AMPLIFIER MOSFET outputs for greater accuracy and harmonics Watts per channel - 200W @ 8 ohms, 350W @ 4 ohms THD + noise at full power - 0.160% @ 20kHz, 0.018% @ 1kHz Dynamic headroom into 4 ohms - 1.7dB Frequency Response - 20Hz to 20kHZ +0, -0.25dB