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INSTRUCTION MANUAL
McINTOSH MODEL C-8 and C-8P
AUDIO COMPENSATORS
The McIntosh Audio Compensator is a complete control unit for professional
or home entertainment systems. The Model C-8 derives its power from any
McIntosh power amplifier: the Model C-8P is self-powered.
Five input channels are provided: three which produce constant amplifica-
tion over the audio spectrum of 20-20, 000 cycles, and two which are equalized for
magnetic phonograph cartridges.
THE AUDIO COMPENSATOR IS A COMPLETE PRE-AMPLIFIER AND
RECORD COMPENSATOR: THEREFORE, THE USE OF AN AUXILIARY EQUAL-
IZER OR PRE-AMPLIFIER WITH THIS UNIT IS NOT RECOMMENDED.
INSTALLATION OF MODEL C-8 and C-8P,
AUDIO COMPENSATORS
The C-8 and C-8P Audio Compensator may be mounted in any type equip-
ment cabinet, relay rack panel, door, wall, etc., or in its own cabinet for chair
side operation. It is not necessary to disassemble the Audio Compensator for
mounting. Cut a rectangular hole in the panel to be used for mounting, insert the
Audio Compensator, and secure with wood or machine screws. Mounting tem-
plates are provided with this manual for the C-8 and C-8P.
When installing the C-8P, the power supply section should be mounted at
least two feet from the Audio Compensator.
After these units have been secured in their desired location, proceed as
follows:
1. Connect speaker to output of power amplifier.
2. Insert power amplifier line cord into one of the Auxiliary A.C.
receptacles provided at the rear chassis of the Audio Compensator.
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3. C-8: Connect inter-unit cable to socket labeled "PRE-AMP.
INPUT" on McIntosh power amplifiers.
CAUTION: THE INTER-UNIT CABLE MUST NOT BE REMOVED
FROM THE C-8.
C-8P: Insert cable of D-8 power supply into socket labeled "INTER-
UNIT CABLE" on C-8P. Connect audio cable provided between
RETMA pin jack labeled "MAIN OUTPUT" on C-8P and 2.5V input
of power amplifier. (Socket labeled "PRE-AMP INPUT" on McIntosh
power amplifiers.)
4. The Audio Compensator delivers 2.5 volts of audio signal at full
output. The gain control of the power amplifier should be
adjusted as outlined in the amplifier instruction manual for this
sensitivity.
5. Turn the volume control on the Audio Compensator to "OFF".
6. Insert power cord of the Audio Compensator into a 117 V.A.C.
power outlet.
7. Turn the Selector switch on the Audio Compensator to "5" and
Bass control fully clockwise.
8. Turn the volume control on the Audio Compensator clockwise
until the power switch is activated. Allow thirty seconds for
warm-up, then advance the volume control to "10".
9. C-8: Adjust the hum reducing potentiometer on the power
amplifier for minimum hum.
C-8P: Adjust the hum reducing potentiometer on the power
supply for minimum hum.
10. Turn the volume control on the Audio Compensator to off.
11. Insert inputs into their proper jacks at the back of the Audio
Compensator, and all A.C. power cords into the A.C. outlets
provided.
