MC275 2-Channel Vacuum Tube Amplifier
MC2.1KW 1-CHANNEL AMPLIFIER - MC901 1-CHANNEL AMPLIFIER - MC1.25KW 1-CHANNEL AMPLIFIER - MC611 1-CHANNEL AMPLIFIER - MC451 1-CHANNEL AMPLIFIER - MC3500 1-CHANNEL AMPLIFIER MKII - MC830 1-CHANNEL AMPLIFIER - MC2301 1-CHANNEL AMPLIFIER - MC462 2-CHANNEL AMPLIFIER - MC312 2-CHANNEL AMPLIFIER - MC1502 2-CHANNEL AMPLIFIER - MC275 2-CHANNEL AMPLIFIER
MC275 mk VI: £7995
75 Watts x 2 channels or 150 Watts x 1 channel
Unity Coupled Circuit Output Transformers
(4) KT88, (4) 12AT7 and (3) 12AX7A vacuum tubes
One of the most iconic amplifiers ever made by any brand
"Good audio engineering is timeless." - Stereophile
Upon its initial release in 1961, the MC275 Vacuum Tube Amplifier became an instant favourite due to its ability to drive the power-hungry speakers of that time with great power at low distortion levels. However, as transistors emerged and vacuum tubes became 'old technology,' the MC275 was discontinued in 1971. Thankfully, that is not where the story of the MC275 ends.
The MC275 can be used in either stereo or mono mode. When used as a stereo amplifier, it will deliver 75 Watts per channel to 4, 8 or 16 Ohm speakers; in mono mode, it will output 150 Watts to a single speaker with an impedance of 2, 4 or 8 Ohms. The MC275's full power can be delivered regardless of the speaker impedance thanks to our patented Unity Coupled Circuit output transformer technology – the same technology McIntosh was founded on in 1949. The two Unity Coupled Circuit output transformers are located next to the power transformer.
Four KT88 vacuum tubes power the output section, while four 12AT7 and three 12AX7A smaller vacuum tubes are used for the Input, Voltage, and Driver amps. The MC275 offers balanced and unbalanced inputs to connect to your preamplifier and home audio system. It comes with our fuse-less Sentry Monitor™ short-circuit protection that disengages the output stage before the current exceeds safe operating levels and then resets automatically when operating conditions return to normal. Our patented gold-plated Solid Cinch™ speaker binding posts assure the best connection to all speaker cables.
The seven small tubes are LED illuminated to indicate the amplifier’s functional status: upon power up, they sequentially glow amber for a few seconds, and then all turn green to signify system readiness. In the rare case of an output tube failure, the small tube(s) in front of it will turn red to notify you of the problem. An input and output for our Power Control technology allow other connected McIntosh components, such as preamplifiers, CD players, turntables, or media steamers, to turn on and off automatically.
McIntosh Solid Cinch speaker binding posts.
MC275 2-Channel Vacuum Tube Amplifier TECHNICAL SPECIFICATIONS
FTC Power Output Rating:
75 W
Total Harmonic Distortion:
0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20kHz
(≤ 0.25% harmonic distortion at 1kHz)
Damping Factor:
>22
Power Output per Channel:
75 W into 2, 4 or 8 ohms
S/N below rated output:
105dB
Rated Power Band:
20Hz to 20kHz
Number of Channels:
2
Dynamic Headroom:
1.2dB
Frequency Response:
+0, -0.5dB from 20Hz to 20kHz
+0, -3dB from 10Hz to 100kHz
WARRANTY PARTS AND LABOUR:
3 Years
GENERAL SPECIFICATIONS
Circuit Configuration:
Unity Coupled
Mono Parallel:
Yes, 150W @ 2, 4 or 8 Ohms
Meter Light Switch:
Small signal tubes LEDs controlled by McIntosh preamp
Illumination:
Small Signal Tubes, LED
Circuit Design:
Vacuum Tube
Output Type:
Unity Coupled Output Transformer
Speaker Binding Post Type:
Patented Solid Cinch™ Speaker Binding Posts
BALANCED INPUT:
1
Chassis Style:
Polished Stainless Steel
Mono Bridge:
Yes
METERS:
No
Front Panel:
N/A
Weights & DIMENSIONS
Unit Dimensions (W x H x D):
16-1/2" (41.9cm) x 8-1/2" (21.6cm) x 12" (30.5cm)
Unit Weight:
67 lbs (30.5 kg)
SHIPPING Weight:
75 lbs (34.1 kg)