I'm posting this here for a non-audiophile friend in the San Francisco/Bay Area. Through a series of estate-related events, he finds himself in possession of 8 McIntosh MC-7270 amplifiers. The MC-7270 was introduced in 1985 and sold retail for $2499 until 1991. These amps have been installed into a wall-unit listening room and are apparently in excellent condition, but have not been used in about 10 years (when the owner passed away).
These amps have been selling on Audiogon for an average price of $1520, with the most recent one being sold last year for $1700 (according to the Audiogon bluebook). As a non-audiophile estate sale, I am sure a reasonable offer will be accepted.
My friend would like to sell all of these amps (individually is ok). Unfortunately, there are no boxes, so a local buyers who can pick them up is preferred. I'm checking with folks here at AC before listing them on Audigon...
If you're interested, PM or email me and I will put you in touch with my friend!
Here's info on the amp that I found on the web...
The MC 7270 incorporates seven protection circuits which insure total reliability, seven protection circuits that protect the music and your listening, not interfere with them.
Power Output
STEREO
270 watts minimum sine wave continuous average power output, per channel, both channels operating into 1 ohm, 2 ohms, 4 ohms, or 8 ohms load impedance, which is:
16.4 volts RMS accross 1 ohm
23.2 volts RMS accross 2 ohms
32.9 volts RMS accross 3 ohms
46.5 volts RMS accross 4 ohms
MONO-BRIDGE
540 watts minimum sine wave continuous power output into 2 ohms, 4 ohms, 8 ohms, or 16 ohms load impedance, which is:
32.9 volts RMS accross 2 ohms
46.5 volts RMS accross 4 ohms
65.7 volts RMS accross 8 ohms
93.0 volts RMS accross 16 ohms
Output Load Impedance
STEREO
1 ohm, 2 ohms, 4 ohms, and 8 ohms; separate terminals are provided for each output.
MON-BRIDGED
2 ohms, 4 ohms, 8 ohms, or 16 ohms, balanced to ground.
Rated Power Band
20 Hz to 20,000 Hz
Total Harmonic Distortion
STEREO
0.02% maximum harmonic distortion at any power level from 250 milliwatts to 270 watts per channel from 20 Hz to 20,000 Hz, both channels operating.
MONO
0.02% maximum harmonic distortion at any power level from 250 milliwatts to 540 watts from 20 Hz to 20,000 Hz.
Noise and Hum
100 dB below rated output
Damping Factor
Greater than 30
Input Impedance
20,000 ohms
Input Sensitivity
Switchable: 0.75 volt or 2.5 volts-level control provided for higher input voltages.
Power Guard
Clipping is prevented and THD does not exceed 2% with up to 20 dB overdrive a 1 kHz.
Power Requirements
120 volts 50/60 Hz; 13 amps.
Semiconductor Complement
79 Silicon Transistors
31 Silicon Rectifiers and Diodes
7 Integrated Circuits
Size
16 3/16 Wide, 7 1/8" High, 14 1/2" Deep including connectors.
Finish
The front panel is a combination of glass and black anodized aluminum.
ELECTRICAL: 270w/ch. (540w mono). Response 20-20kHz (+0 -0.25dB). Distortion 0.02%. Noise and hum -100dB. Output impedance 1, 2, 4 and 8 ohms. (2, 4, 8 and 16 ohms in mono). Damping factor 30 or greater. Input impedance 20k. Input sensitivity 0.75v or 2.5v. Sentry Monitor. Power Guard.
FRONT PANEL: Glass panel top. Black anodized bottom. Illuminated. Power level meters (linear watts or dB). Gain controls. Meter sw: watts or hold. Power Guard lamps. Power sw: on or off.
BACK PANEL: Output barrier strips. Audio inputs. AC outlet. Input level sw: 2.5v or .75v. Mode sw: stereo or mono bridge. Fuse. Panloc mounting.
Size 7-1/8"H, 16-3/16"W and 14-1/2"D. Weight 82 lb.
Sold from 1985-1991.
Last retail price $2499.00
