This NAD preamp does work, but it has a couple issues. First, its missing the physical power button but the mechanism still works. Secondly, the sound on the right speaker goes in & out. A slight jiggle of the volume knob makes that issue go away which PROBABLY means that its just an oxidation issue and a spray of de-ox should PROBABLY fix that. I have priced the unit accordingly. It does have some cosmetic imperfections - please see pics. FREE shipping anywhere in the continental USA via UPS or FedEx (no PO boxes).

Audiopipe APMI-4095 Class AB 1300 Watt Compact Mini MOSFET 4 Channel Amplifier Awesome lil 4-channel that’s powerful and has a small footprint. Fully functional. See pictures for condition. Fast shipping. You won't know if you're in front of the band or in your car with the Audiopipe APMI-4095 1300-Watt 4-Channel Amp. The small footprint of this beastly amp allows more versatile mounting options and saves you precious cargo space. Class AB circuitry ensures that your music is as clear as possible and high and low pass filters keep the right frequencies on the right speakers. Your speakers will never sound the same once you hook up the Audiopipe APMI-4095 1300-Watt 4-Channel Amp. Upgrade your audio system to this high-performance class AB mini 4-channel amplifier boasting 1,300 watts of power for bumping bass and full sound Bridged operation for customizable use Designed with soft start turn-on as an added safety power-up measure RMS performance includes 100 watts x 4 at 4-ohm 130 watts x 4 at 2-ohm 250 watts x 2 bridged at 4-ohm Includes remote gain control and wired remote bass level control Maximum power output: 2 x 250 watts Frequency response: 50 to 1.2 KHz Input sensitivity: 0.2 to 6-volt Signal to noise: Greater than 80 dB Fuses: 30A x 2 Dimensions [L x W x H]: 9.5 x 6.5 x 2.2 inches

AUDIOPIPE APMCRO-4100 CLASS D 4-CHANNEL CAR AUDIO MICRO AMP AMPLIFIER 1300W.