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MC275
Vacuum Tube Power Amplifier

An object of desire cherished by music lovers around the world, the MC275 was designed and engineered in 1961 by McIntosh co-founder Sidney Corderman and the McIntosh Engineering Team. Based upon the extraordinary Unity Coupled Circuit, the MC275 has a lush sound that presents a powerful and detailed soundstage.

 

The MC275 develops 75 watts per channel into 2, 4 or 8 ohm loads, or 150 watts in bridged mono mode. Both balanced and single ended inputs are supported. The mirror polished stainless steel and black chassis with die cast nameplate is presented here just as it was in the original 1961 model.


Product Details: Features Product Details: Specifications Product Details: Resources Product Details: Buying Advice
MC275 Tube Power Amplifier Features

FULL POWER DELIVERY

The MC275 Series IV delivers 75 watts per channel into 4, 8, and 16 Ohm speakers.

 

ULTRA LOW NOISE AND DISTORTION

Distortion-canceling properties of McIntosh’s Unity-Coupled circuit and

unique Output Transformer design yield much lower distortion and noise across

the entire 20-20,000Hz music range.

 

WIDE BANDWIDTH

McIntosh’s exclusive Output Circuit and Transformer designs ensure ultra-wide

frequency bandwidth.

 

MONOBLOCK

The two 75-watt channels may be combined into a single channel of 150 watts

into 2, 4 or 8-Ohm loads.

 

INVERTED CHASSIS

Heat producing tubes are located on top of the chassis, under a protective

cage, while other circuits are shielded within the polished Stainless Steel

Chassis.

 

  • Gold-Plated Unbalanced Input
  • Jacks and Speaker Outputs
  • Balanced XLR Input Jacks
  • Ceramic Tube Sockets with Gold-Plated Pins
  • Front Apron Power Switch
  • IEC Plug-In Power Cord on Right Side
  • Stereo/Mono Switch
  • Taps for 4, 8, & 16-Ohm Speakers
  • Polished Stainless Steel Chassis
MC275 Tube Power Amplifier Specifications

POWER OUTPUT STEREO

Minimum sine wave continuous average power output per channel, both channels operating is: 75 watts into 4, 8 or 16 ohm load.

 

POWER OUTPUT MONO (PARALLEL)

Minimum sine wave continuous average power output is: 150 watts into 2, 4 or 8-ohm load

 

OUTPUT LOAD IMPEDANCE

4, 8, or 16 ohm (stereo) 2, 4, or 8 ohm (mono)

 

RATED POWER BAND

20Hz to 20,000Hz

 

TOTAL HARMONIC DISTORTION

Maximum Total Harmonic Distortion at any power level from 250 milliwatts to rated power output is 0.5%

 

FREQUENCY RESPONSE

+0 /-0.5dB from 20Hz to 20,000Hz

+0/-3dB from 10Hz to 70,000Hz

 

SENSITIVITY

1.2V unbalanced inputs

2.5V balanced inputs

 

A-WEIGHTED SIGNAL-TO-NOISE RATIO

100dB

 

INTERMODULATION DISTORTION

Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output, for any combination of frequencies from 20Hz to 20,000Hz, with both channels operating is 0.5%.

 

WIDE BAND DAMPING FACTOR

Greater than 14

 

POWER REQUIREMENTS

120V, 50/60Hz, 3.6A

 

OVERALL DIMENSIONS

(H x W x D including feet and knobs)

8-1/4” (21cm) x 16-1/2” (42cm) x 12” (30.5cm)

 

WEIGHT

67 lbs. (30.5kg) net

75 lbs. (34.1kg) in shipping carton

MC275 Tube Power Amplifier Owner's Manual and Literature

Manuals & Documents

MC275 Vacuum Tube Power Amplifier Owners Manual (1050.72KB)

Downloads & Updates

MC275 Review from Inner World Audio - Finland (1033.02KB)

MC275 Vacuum Tube Power Amplifier Literature (156.81KB)

Product Details: Reviews and Awards
For the Consumer's Protection

In order to ensure the highest level of customer satisfaction, "new" McIntosh products may only be purchased over-the-counter or delivered and installed by an Authorized McIntosh Dealer.

McIntosh products that are purchased over the Internet, by phone or mail order are presumed to be "used" and do not qualify for any McIntosh Warranty. McIntosh does not warrant, in any way, products that are purchased from anyone who is not an Authorized Dealer or products that have had their serial number altered or defaced.