If you're interested you will know about this amplifier. Very well treated, recapped several years ago and replaced the old leaky stubby caps. Ready for another 20+ years of use. Paint separating in lower right corner, but easily survives the 2 foot inspection I have several of these and time to thin out the herd. No Trades or lowballs. I am only selling to serious audio enthusiasts not people who will run this on a $50 Pyle woofer. 4 channel X 100w. Configurable for 4/3/2 channel operation. Includes built-in electronic crossover with separate high pass and low pass filters. Power Guard. Ported tunnel forced-air cooling. Multi-stage thermal protection. Dual MOSFET PWM power supplies. Input level controls. Transient protection. Gold plated terminals. 2 ohm stability. Allows internal installation of McIntosh parametric equalizer modules. Size 2-3/4"H, 18-1/2"W and 12"D