AudioSource AMP 5.2 mono amp, great for center channel or subwoofer. Practically new. My multichannel plan didn't fly so this amp needs to go. $125 shipped, firm. "High-current monoblock power amplifier delivers up to 150 watts Stays stable into 2-ohm loads and includes abundant headroom Greater than 200 damping factor at 95 dB signal-to-noise ratio (4 ohms) 20 to 20000 Hz frequency response0.1 percent THDand 1-volt input sensitivity Fan-cooledrack-mountable chassis made of heavy-gauge steel."