Model: ca 9 8 ohms stereo power: 600w 1khz, 0.03% thd+n; 550w 20hz-20khz, 0.1% thd+n 4 ohms stereo power: 900w 1khz, 0.03% thd+n; 800w 20hz-20khz, 0.1% thd+n 2 ohms stereo power: 1000w 1khz, 0.03% thd+n; 900w 20hz-20khz, 0.1% thd+n 8 ohms bridged mono power: 1800w 1khz, 0.03% thd+n; 1600 w 20hz-20khz, 0.1% thd+n 8 ohms bridged mono power: 2000w 1khz, 0.03% thd+n; 1800w w 20hz-20khz, 0.1% thd+n max rms output voltage (each channel): 82v peak output voltage (each channel): 116v frequency response (+0 / -0.3db, 1w/81/2):20hz-20khz, -3db power bandwidth (rated power at 4 ohms, 1% thd+n): 20hz-20khz, -.84db/+0db tourclass protection: acl, igm, autoramp, short circuit, dc voltage, turn-on/off transient, current inrush, sub/ultrasonic input. thd+n (rated power at 4 ohm, 1khz): <0.01% smpte imd (rated power at 8 ohms