How To Connect - McIntosh C28 Owner's Manual

CONNECTING THE C 28 TO POWER AMPLIFIERS
Connect the MAIN output jacks to the input of a
stereo power amplifier. The "L" jack is connected to
the "left" amplifier input jack. The "R" jack is con-
nected to the "right" amplifier input jack.
The output impedance at the MAIN outlet is 100
ohms. Longer cables than are supplied can be con-
nected between the C 28 and the amplifiers. The
length of the cable is limited by the capacity of the
cable. The total capacity must not exceed 1000 pF.
For instance: cables with a capacity of 25 pF per
foot may be 40 feet long. 13.5 pF per foot cable
may be 75 feet long. The input impedance of the
amplifiers should be 47,000 ohms or greater.
CTR OUTPUT
Use the CTR output to feed left plus right signal to a
separate power amplifier for monophonic back-
ground music or for a center channel speaker.
SPEAKER CONTROL RELAY
To control main and remote loudspeakers from the
front panel of the C 28 an accessory Mclntosh SCR
control is needed. Plug the cable from the SCR con-
trol in the SPEAKER CONTROL RELAY receptacle.
The speakers are then connected to the SCR con-
trol. The AC outlets on the SCR have a total capa-
city of 2400 watts.
AC OUTLETS
There are 4 black AC outlets, 2 green AC outlets,
and one red AC outlet. The power to the black AC
outlets is controlled by the front panel switch. Use
these outlets for a tuner, tape recorder, etc. The
green outlets are controlled by the top panel switch
marked "Power Amplifier." The total capacity of all
AC power outlets is 600 watts. To prevent burnout,
use the AC outlets on the CR for power requirements
exceeding 600 watts. The red receptacle is on at all
times. Use the red outlet for a turntable or record
changer. The turntable is protected by this arrange-
ment. It is necessary to turn off the turntable or rec-
ord changer with its own AC switch.
GROUND CONNECTION
A single ground post is provided. Grounds for turn-
tables, record changers, tape decks, etc. should be
connected to this post. The left and right program
cables and the ground wire from that source should
be wound or twisted together. To avoid hum, make
sure the ground wire does not make any connec-
tions to the shields of the left and right program
cables between the program source and the C 28.
6