I purchased this from the original owner about 15 years ago. Has been a terrific amp but has been stored in a closet for the last few years as I've moved to smaller, less space consuming integrated. I can say that I've never had a pair of speakers that didn't sound great with this amp.
1) In '08 I had it cleaned and serviced by local McIntosh authorized dealer (ListenUp).
2) The glass front was replace about four years ago and is flawless.
3) I believe the light on the far right may be burnt out.
4) The chrome side bezels are not original, they are from a more modern unit 5) Sometimes when the amp is first powered on, the left channel will loose volume. I've always just turned the left volume up a bit and then back to normal and it operates fine after that. (This doesn't always happen when you first power it on but it needs to be mentioned) 6) Two screws from the speaker bindings are missing (see photos) 7) the unit is has some scratches on the top and sides, but there is no rust. This unit has always been stored indoors in a smoke-free environment (see photos)
8) The case, which I was told is the original, has a few scratches and a nick on one side (see photos)
Overall this is a terrific amp. I've seen this amp restored going for three times the price I'm asking. Please note that this is a 40+ year old vintage piece of electronics and that I've described the condition and provided photos of any know defects by me to the best of my ability. I will double box with custom foam inserts to protect glass front during transit with insurance via FedEx ground.
It is your responsibility to review all photos and ask questions. Sold as-is. Any damage suffered during transit needs to be communicated to me within 48 hours of receipt. Payment is due within 48 hours of commitment to buy or a 'non-payment' dispute will be filed.
Performance Limits and Ratings
audio power ratings are in accordance with the Federal Trade Commission
Regulation of November 4, 1974 concerning power output claims for
amplifiers used in home entertainment products.
watts minimum sine wave continuous average power output, per channel,
both channels operating into 4 ohms, 8 ohms, or 1.6 ohms load impedance,
20.5 volts RMS across 4 ohms
29.0 volts RMS across 8 ohms
41.0 volts RMS across 16 ohms
OUTPUT LOAD IMPEDANCE
4 ohms, 8 ohms, or 16 ohms; separate terminals are provided for each output
RATED POWER BAND
20 Hz to 20,000 Hz
TOTAL HARMONIC DISTORTION
maximum harmonic distortion at any power level from 250 milliwatts to
105 watts per channel from 20 Hz to 20,000 Hz, both channels operating
if instantaneous peak power output is 210 watts or less per channel
with both channels operating for any combination of frequencies 20 Hz to
20 Hz to 20,000 Hz +0 -0.25 dB
10 Hz to 100,000 Hz +0 -3.0 dB at one watt output
NOISE AND HUM
90 dB below rated output
OUTPUT POWER MONITOR METER
is calibrated to read +3 dB when amplifier produces 105 watts. Meter
range switch is provided to increase meter sensitivity by 10 dB or 20 dB
Calibration accuracy at 0 dB reading is ±2% at all frequencies; meter
range accuracy is ±5%
25 volts for distribution lines
13 at 8 ohms output 18 at 4 ohms output 10 at 16 ohms output
0.5 volt. Level control provided for higher input voltage
120 volts 50 60 Hz, 75 watts at zero signal output, 430 watts at rated output
34 silicon transistors
18 silicon rectifiers and diodes
panel measures 16 3/16 inches wide (41,12 cm) by 71/8inches high (18,1
cm). Chassis measures 15 inches wide (38,1 cm) by 6 9/16 inches high
(16.67 cm) by 141⁄2 inches deep (36.83 cm), including connectors. Knob
clearance required is 11⁄2 inches (3.81 cm) in front of mounting panel
Front panel is anodized gold and black with special gold teal nomenclature illumination. Chassis is chrome and black
Exclusive Mclntosh developed professional PANLOC
65 pounds (29.48 kg) net, 77 pounds (34,93 kg) in shipping carton
amplifier is completely stable when connected to any loudspeaker system
or even to any reactive loads; The MC 2105 has special circuits to
prevent damage by short circuit or open circuit of the output loads, or
by any amount of output impedance mismatch, Thermal cutouts are mounted
on the output transistor heat sinks to provide protection in the event
of inadequate ventilation.
Peak reading - peak locking meters feature special circuit to respond to peak value of complex input signal