The Parasound HCA-1500A is a John Curl design. THX Ultra certified. http://www.parasound.com/products/am...500aspecs.html Continuous Power Output - Stereo: 205 watts RMS x 2, 20 Hz - 20 kHz, 8 ohms, both channels driven; 315 watts RMS x 2, 20 Hz - 20 kHz, 4 ohms , both channels driven Continuous Power Output - Mono: 630 watts RMS, 20Hz - 20kHz, 8 ohms The indicators LEDs are out, but the amp is in excellent shape with no scratches. I have the original receipt, manual, and box. I purchased it with a Parasound 2205, but have decided to scale back my plans to 5.1 instead of 7.1. $520 plus shipping. Located in Chicago.