The Crown K2 is a 2-channel, fanless (quiet), convection-cooled, balanced current power amplifier.
It delivers 500 watts per channel @ 8 ohms, 800 watts per channel @ 4 ohms, 1250 watts per channel at 2 ohms, with a massive 2,500 watts output in 4-ohm bridged mono mode. Excellent condition.
$425. These are amazing amplifiers and will solve your problems. Cash Only.