Listing on consignment for the current owner. Smoke free, pet free. He was using 2 of these in mono. This one is in better cosmetic condition than the other one listed, hence the price difference.
The 2155, which is simply the power amplifier section of the 3155 and 7155 packaged on a separate chassis, is NAD's building block amp, offering a variety of convenient and economical approaches to upgrading a stereo system for higher performance and power.
The 2155 is an obvious choice if you want to upgrade from a low powered receiver or integrated amp, or if you are using a separate preamplifier.
If you need still higher power, a pair of 2155's in the bridged mode deliver nearly three times as much power output for only twice the cost.
Power output: 55 watts per channel into 8Ω (stereo), 125 watts into 8Ω (mono)