Specifications

THERMAL PROTECTION
Thermal sensors that turn off the AC power if
improper loading or ventilation causes the amplifier to
over heat.
TURN ON DELAY
The MC7150 has a circuit that delays amplifier
operation for about two seconds after turn on. This
prevents pops or thumps generated in other equipment
from causing annoying noises or damaging your
speakers.
OUTPUT AUTOFORMERS
The unequaled expertise of Mclntosh in the design
and manufacture of output transformers is legendary
in the Hi Fi industry. In the MC7150 they provide proper
matching for 2, 4 and 8 ohm loads. They protect your
speakers from damage in the event of an output
transistor failure, provide low distortion power transfer
at frequencies well beyond human hearing and deliver
peak output current in excess of 53 amperes.
MODULAR CONSTRUCTION
If service should be required, modular construction
makes repairs easier.
Performance Specifications
STEREO POWER OUTPUT
150 watts into 8, 4 or 2 ohm loads is the minimum
sine wave continuous average power output per channel
from 20Hz to 20,000Hz with both channels operating.
The output RMS voltage is:
34.6 across 8 ohms
24.5 across 4 ohms
17.3 across 2 ohms
OUTPUT LOAD IMPEDANCE
STEREO
8, 4 or 2 ohms by connecting to the proper output
terminals.
RATED POWER BAND
20Hz to 20kHz
TOTAL HARMONIC DISTORTION
0.005% maximum harmonic distortion at any power
level from 250 milliwatts to rated power per channel
from 20Hz to 20,000Hz, both channels operating.
INTERMODULATION DISTORTION
0.005% maximum if instantaneous peak per output
does not exceed twice the output rating per channel,
with both channels operating, for any combination of
frequencies from 20Hz to 20,000Hz.
FREQUENCY RESPONSE (at 1 watt output)
+ 0, -0.25dB from 20Hz to 20kHz
+ 0, -3.0dB from 10Hz to 100kHz
HUM AND NOISE (A-weighted)
110dB below rated output
IHF DYNAMIC HEADROOM
1.8dB
DAMPING FACTOR
Greater than 40
INPUT IMPEDANCE
20,000 ohms
INPUT SENSITIVITY
1.4 volts (2.5V at gain control center detent)
POWER REQUIREMENTS
120 volts, 50/60Hz, .5 to 7 amps
SEMICONDUCTOR COMPLEMENT
62 Silicon Diodes
2 Light Emitting Diodes
72 Bipolar Transistors
7 Integrated Circuits
How to Connect Amplifier
INPUT
Use shielded cables to connect the signal from
the preamplifier or signal source to the power amplifier
input. To minimize the possibility of hum the shielded
cables should be run parallel to each other or loosely
twisted together. Locate the cables away from speaker
leads and AC power cords. All connections are made
on the back panel of the MC7150.
The left output of the preamplifier should be
plugged into the LEFT INPUT jack of the power amplifier.
The right output of the preamplifier should be plugged
into the RIGHT INPUT jack of the power amplifier.
OUTPUT
Selection of the proper gauge wire to connect
the loudspeakers preserves the quality of sound re-
MclNTOSH LABORATORY INC., 2 CHAMBERS STREET, BINGHAMTON, NEW YORK 13903
MC7150 Product Preview/Page 2