Amplifier Parameters unit p-pa1200 p-pa1500 p-pa2500 p-pa3500 Output power stereo @ 8 ohm watt 2x400 2x550 2x700 2x1000 Output power stereo @ 4 ohm watt 2x600 2x800 2x1100 2x1500 Output power bridged @ 8 ohm watt 1000 1500 2000 2800 Frequency response hz 20hz-20khz; +0.1/-0.3db (1w / 8 ohm) T.H.D db