McIntosh C-8-S Owners manual

INSTALLATION for C-8S

The C-8S Professional Audio Compensator with Stereo Control is a
complete C-8 Compensator with the addition of a "STEREO MODE SELECTOR

SWITCH," "STEREO BALANCE" and ganged dual "VOLUME CONTROLS".
Shipped with the C8s are two 6 foot shielded leads and one 3 foot shield-

ed lead. These will be used in interconnecting the system.
To interconnect the C-8 and C-8S for monaural-stereo reproduction,

complete the following procedure. Use the C-8 for the left channel

and the C-8S for the right channel.

(A.)

The C-8 Is first modified as follows:

1.) The heavy inter-unit cable connecting the C-8 to the power

amplifier Is disconnected at the amplifier end.

2.) With a pair of cutting pliers, remove pin #2 from the octal plug
of the inter-unit cable. In a monaural system pin #2 carries the signal
from the preamplifier to the power amplifier. In a stereo system the
signal must be obtained from the main output jack on the back of C-8.

3.) After removing pin #2 the inter-unit cable Is reconnected to the
power amplifier.

4.) On C-8's with serial #10600 and above the input marked "MIC" can
be simply converted to preamplification and equalization for tape heads
by cutting one wire on the input selector switch, (see figure B.)

On serial numbers below 10600 the conversion must be done at the factory
The cost of factory conversion is $5.00. Tape heads can, of course,
be used in "PHONO #1" on all C-8 compensators without any conversion.

For proper tape head connection see the top paragraph on page 4 of the

C-8 Instruction manual.

-2-

(B.)

Now connect the program sources in the following fashion:

1.) Plug one end of the 3 foot shielded lead into the jack marked
"MAIN OUTPUT" located on the back panel of the C-8.

2.) The C-8 "VOLUME" control on the front panel is turned fully
clockwise. The changes in volume will be controlled by the C-8S ganged

"VOLUME" control.

3.) Insert the left channel phono cartridge lead in "PHONO #2" on the
C-8.

4.) If a tape deck is used for stereo playback, insert left channel
lead into "MIC" input of the C-8, serial #10600 and above, after conver-

sion as in section A, step #4 above. This input is terminated at 100,000

ohms. N.A.R.B. tape playback equalization is achieved by depressing the

Bass Compensation switch labeled "950", adjusting the "BASS" tone control

to - 1, and adjusting the "TREBLE" tone control to- 2.5.

If a stereo tape playback with preamplifiers is used, insert the
left output in the channel marked "TAPE".

(c.)

Next interconnect the C-8S:

1.) Plug the heavy inter-unit cable from the C-8S in the octal socket

marked "Pre-Amp" on the right power amplifier.

2.) The loose end of the 3' shielded lead (section B, step #1) from
the C-8 "MAIN OUTPUT" is plugged into the "LEFT STEREO IN" on the C-8S.

3.) Interconnect by means of one of the 6' shielded cables between
the jack marked "LEFT STEREO OUT" on the C-8S and the "0.5 VOLT" input

of the left power amplifier.

4.) Interconnect by means of the other of the 6' shielded cables between

the "MAIN OUTPUT" on the C-8S and the "0.5 VOLT" input on the right
power amplifier.

5.) Plug the A.C. cord from the C-8 into one of the auxiliary A.C.
receptacles on the C-8S.

6.) The A.C. cords from both power amplifiers can now" be plugged into
the auxiliary A.C. plugs on their respective preamplifiers. The on-off
switch on the volume control of the C-8S now controls turning on the
entire system.