Thisis a powerful Amplifier, I use it to power a pair of Polk Audio SDA 2reference signature speakers. The sound is so clean and powerful , Ihope the winner of this monster amp have good high end speaker toenjoy the prestige of this amp. The front has some minor scratchesbeside that all seven channels were tested and are in perfect workingcondition.

-7 x 140W Minimum Continuous Power (8 / 4 Ohms); all channels drivensimultaneously
-2 x 200W Continuous Power (8 / 4 Ohms)
-230W, 390W and 450W IHF Power into 8, 4 and 2 ohms, respectively
-Mono-block, Modular construction
-Differential, Class A input circuit topology
-High Current Holmgren Toroidal Power Transformer
-Input gain control for each individual channel
-Gold Plated RCA Inputs
-NAD Soft Clipping
-12V Trigger for automated ON/OFF operation

-Frequency response: 2Hz to 100kHz

Totalharmonic distortion: 0.03%

Dampingfactor: 300

Gain:29 dB

Inputsensitivity: 1.1V

Signalto noise ratio: 125dB

Speakerload impedance: 2Ω (minimum)

Dimensions:435 x 180 x 453mm

Weight:31kg ( gigantic and heavy)