For your consideration, we have the classic Mcintosh MC 2105 Power Amplifier for sale. The unit is in very good physical condition, and in perfect working order. Physically, the glass is new with no visible flaws. The knobs show only minor blemishes here and there, and have a great finish to them. The trim pieces have some light scratches and a small nick on the right piece. The sides, top and bottom of the amp are all in very good shape with some blemishes. The back of the amp has some pitting, with some rust around the fuse holder, which is typical on these units. Overall it's a great looking piece.
The unit has been fully serviced. All pots and switches were cleaned, and then treated with Deoxit F5 and D5 respectively. We replaced the Meter bulbs with LED, and used incandescent bulbs on the Wording lights. All necessary caps for preventative maintenance were replaced on the power output circuit boards, input boards and the Meters board. The meters were calibrated to factory specifications.
When initially testing the amp we hooked it up to a Sencore PA81 Stereo Stereo Power Amplifier Analyzer acting as a dummy load and Oscilloscope interface. Using an audio generator, we ran a 1k signal through the amps input, slowly increasing the amplitude while monitoring the output on our oscilloscope for signs of noise, clipping, distortion, or improper channel balance. We spotted a slight channel imbalance and upon further inspection we noticed that one of the main filter caps was starting to leak. Two new Cornel Dublier Main filter capacitors were installed, and the imbalance issue was resolved. The amp easily produced a clean 105 watts per channel on our bench. Following the work performed on the unit, it spent time on our bench, and then in our house system for about a week running daily for 8 hours a day. It performed flawlessly.
The MC 2105 will ship in a new Mcintosh MC 2105 factory box.