This is an excellent amp that was purchased with and used to drive my SVS subs. I am the original owner and have the box and manual. Due to a recent purchase of a used Crown K1 (at more than twice the asking price for this amp), I am selling the Samson. $250 shipped within continental U.S. Rated Output Power, per channel (1 kHz, THD 0.1%, Both Ch Driven) Stereo/Parallel modes: per channel (into 4 ohms) 545 W per channel (into 8 ohms) 340 W Bridged mode: per channel (into 8 ohms) 1090 W Frequency Response (0 dB, +0, -.5 dB): 10 Hz - 20 kHz Total Harmonic Distortion: (1/2 power @ 20 Hz - 20 kHz, Both Ch Drive into 4 ohms) 0.04% Dynamic Range: 103 dB Channel Separation: (4 ohm, 125 W, 1 kHz) 80 dB Damping Factor: More than 200 Dimensions (W x D x H): 19 x 16 x 3.75 in. Weight: 36 lbs.