McIntosh MC-275 Mk5 Brochure

Mc275

l e g e n d a r y

vacuum tube power amplifier

In 1949, McIntosh was awarded a patent for its Unity-Coupled output circuit and has been
improving it ever since. The revolutionary circuit design enabled the development of audio
amplifiers that produced the lowest distortion over the widest bandwidth, all without
sacrificing high efficiency.

The venerable MC275, arguably the most sought-after amplifier ever built, was first
launched in 1961 and represented the pinnacle of vacuum tube technology. Commemora­tive versions, which were popular when released during the 1990s, employed the
amplifier’s original design.

The enhanced performance of the new MC275 is the result of modern design technology
and manufacturing techniques. Old-fashioned point-to-point wiring has been replaced with
glass-epoxy printed circuit boards, developed through computer-aided design, which
ensures lowest noise and highest operational consistency.

“updated design
enhances the
performance of a
classic amplifier”

Gold-Plated Unbalanced Input
Jacks and Speaker Outputs

Balanced XLR Input Jacks

Ceramic Tube Sockets with Gold­Plated 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

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

vacuum tube power amplifier

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) boxed

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.

FOR THE CONSUMER’S
PROTECTION

In order to ensure the highest level
of customer satisfaction, “new” McIntosh
products may only be purchased over-the­counter 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.

A-WEIGHTED SIGNAL-TO-NOISE RATIO

100dB

To experience the legendary performance of McIntosh, please call on us at 1-800-538-6576

35007100 MC275

www.mcintoshlabs.com