McIntosh MC-2155 Brochure

McIntosh MC 2155

150 Watt Per Channel

Power Amplifier
Oplional Walnut Veneer
Cabinet

The Word For

EXCELLENCE

Handcrafted with pride in the United States by dedicated highly trained craftspeople.

The MC 2155...150 WATTS OF PURE PERFORMANCE

The McIntosh reputation for
QUALITY is acknowledged world
wide: quality performance, quality
appearance, quality manufacture,
and quality protection. Each com­ponent selected for use in a
McIntosh is quality tested not only
for performance but for maintain­ing that performance over the
long life expected of a McIntosh.
At McIntosh, everyone and
everything is dedicated to con­tinuation of proven-McIntosh

quality.

Since 1949, McIntosh has con­tinuously expanded the boun­daries of power amplifier
technology and performance with
the introduction of each new
design. What is considered to be

"State of the Art" has been the
starting line for McIntosh re­search, research that responds to
the demands for quality perfor­mance improvements. The U.S.
Patent Office has granted
McIntosh 30 patents which

recognize these unique and pace
setting electronic designs. Current
McIntosh amplifiers use one or
more of these U.S. Patents:

4,065,682; 4,048,573; 3,526,847;

and 3,526,846.

But, patents only verify the
engineering superiority and design
integrity. Quality is the desire that
is expressed in performance pro­mised - and delivered-over a long
trouble-free life. McIntosh
superior quality has been long
recognized world wide.

MCINTOSH QUALITY
BEGINS WITH CAREFUL
DESIGN FOR COOL
OPERATION

To achieve long trouble-free life
in an amplifier it is essential to
have cool operation. As little as
one degree (centigrade) rise in
temperature can reduce the
operating life of the amplifier

10%. McIntosh has extended the
life of its amplifiers by engineer­ing for cool operation. McIntosh
cool operation requires a com­bination of careful design of the
output circuit, containing the out­put circuit in a mechanical hous­ing that permits the use of gener­ous sized heat sinks to provide
great heat dissipation capability
along with chassis construction

that permits adequate ventilation,
then correctly matching the cool
operating output circuit to the
loudspeakers with a McIntosh
designed and manufactured auto­transformer.

The McIntosh output circuit
uses bipolar epitaxial output tran­sistors in a cleverly inventive
design that keeps the circuit com-

ponents cool, extending the long
trouble-free life of the com­ponents. The circuit has the abili­ty to recognize the power
demands of the program material
and then to activate only as much
of the output circuit as is needed
to satisfy that demand. All this oc­curs without the crossover distor­tion found in conventional solid
state output circuits. (The
amplifier circuit is a patented
McIntosh design U.S. patent
#3526847.)

The McIntosh output stages are
mounted on heat sinks that have
772 square inches of cooling cap­ability, the largest for equivalent

power in the industry. The super
sized heat sinks are placed in an
air tunnel chassis design that oc­cupies the entire space from the
bottom of the amplifier to the top.