Wisdom Audio SA-3 3 Channel Amplifier

I have two (2) of these amplifiers, each putting out 500 watts per channel into 3 channels at 4 ohms. I wish to sell them as a pair. Price is firm. The Wisdom Audio amplifier/speaker system is designed to take advantage of a fact that has hitherto been understood only by a relatively small number of audiophiles: speakers sound better when they are driven directly by dedicated, high quality amplifiers. The benefits of enormous power reserves are fairly obvious: freedom from any audible strain, greater dynamic impact, and the ability to hear music and movie soundtracks at their intended volume without worrying about whether the system can handle it. However, the traditional methods for achieving this required level of performance involve bulky, heavy designs that generate a great deal of heat. When you multiply the number of channels required for a modern home theater application times two (for bi-amplification), and add in one or more dedicated subwoofers, suddenly you have need for smaller, more efficient amplifier designs. The high efficiency of the SA-series design also means that the amplifiers can be placed in close proximity to each other, as in an equipment rack, without undue overheating. Of course, care must be taken to account for the heat generated by other components in the rack; but the Wisdom Audio amplifiers will not greatly contribute to the thermal management challenges of your system. The notion of trading power requirements for small size has been used extensively in subwoofer designs for over thirty years, and is well proven. Wisdom Audio has now brought these same benefits to the main speakers, in order to achieve outstanding bass performance in speakers of modest size. The Wisdom Audio SA-series amplifiers were designed from the outset to provide the extra power required by this approach. Rated power output per channel 500 w/ch continuous rms power @ 4Ω above power ratings from 20 Hz–20 kHz at 30 amps Voltage gain 31 dB Input sensitivity 1.2V for full output Input impedance 25 kΩ (balanced) Polarity Non-inverting, Pin 2 positive Signal to Noise ratio (main outputs) –103 dB (ref 1V rms, A-wtd.) Output impedance less than 0.05Ω from 20–20,000 Hz Thermal load 7 BTU/minute or less Mains voltage 100V, 120V, or 230/240V determined by the needs of country for which the unit was manufactured; cannot be reset by dealer or user Shipping weight 40 lbs. (19 kg) Power consumption, SA-3 1870W (±5%) at full power, all channels driven Power consumption, SA-2, SA-1 1255W (±5%) at full power, all channels driven Power consumption, all three models 10W (±5%) at idle and 2W (±5%) in standby This component has passed independent certification and testing by the internationally recognized testing laboratory TÜV SÜD for worldwide operation.