Specifications

The VIDEO INPUTS are SAT, TV, LV, VCR1, VCR2
and V-AUX. The V-AUX inputs are switched to the front
panel CAMCORDER inputs when the ACCESS door is
opened.
The VIDEO OUTPUTS are VCR-1, VCR-2 MONITOR
A and MONITOR B. VCR-1, VCR-2 and MONITOR B
outputs are fed from the RECORD (B) input selector and
the MONITOR A output is fed from the LISTEN (A) input
selector. This allows one to be watching and listing to
one VIDEO source while taping another or to feed two
different VIDEO sources to a monitor equipped for
"Picture in a Picture" viewing.
A TV modulator is provided for a TV channel 3 or 4
output. The input to the modulator can be selected (A
or B) by a rear panel switch. It switches both composite
video and audio. Mono audio is provided and its level
may be adjusted by the TV AUDIO potentiometer.
Several Surround Sound functions are provided by
rear panel switches. The HIGH PASS switch switches
high pass filters in the LEFT FRONT, CENTER and RIGHT
FRONT channels ON or OFF. When large full range
speakers are used for the front channels the switch
should be in the OFF position.
Compact speaker systems that utilize a separate
SUBWOOFER require the HIGH PASS switch to be in
the ON position. Low frequency sound at high levels
can overload compact speakers.
The CENTER SPEAKER switch position is again
determined by speaker type. If no CENTER speaker is
used, the switch should be placed in the NONE position.
This position feeds CENTER (L&R) information to the
LEFT FRONT and RIGHT FRONT channels to create a
PHANTOM CENTER channel. A small compact speaker
for the CENTER channel requires that the switch be
placed in the SMALL position. Here the switch places
a high pass filter in the CENTER channel and diverts the
low frequency sound to the LEFT and RIGHT FRONT
speakers. A LARGE full range CENTER speaker requires
that the switch be placed in the LARGE position for full
response in LEFT, CENTER and RIGHT FRONT channels.
This switch is only active in CINEMA 1 (DOLBY PRO
LOGIC). In CINEMA 2 (THX) and other modes it is
electronically locked in the LARGE position.
The SUR CAL switch selects an AUTOmatic or
MANual mode for calibration of the surround system.
See SUR CAL push button explanation under Front Panel
Controls, page 5 & 6.
REMOTE CONTROL
Two "F" connectors are provided. One is for an
AREA A external sensor and one for the AREA B sensor.
A 15 pin subminiature "D" connector is provided for
parallel control of Mclntosh tuner functions.
Two 7 pin DIN connectors are provided for parallel
control of CD players or changers.
A 1/8 inch phone jack for HOME and each input
selection provides serial data outputs for control of other
equipment.
A 1 /8 inch phone jack for POWER CONTROL of high
power Mclntosh amplifiers is also provided.
SYSTEM EXPANSION
Buffered audio outputs and the necessary data lines
for system expansion are provided on a female 25 pin
subminiature "D" connector. One cable to a CR10
MULTI-ROOM CONTROLLER is the only connection
required.
AC POWER
One switched AC outlet is provided for program
source equipment. A second and third are for the AREA
A and AREA B Power Amplifiers.
TECHNICAL DESCRIPTION
ELECTRO-MAGNETIC SWITCHING
All audio signal switching in the C39 is done by
ELECTRO-MAGNETIC methods. ELECTRO-MAGNETIC
switching is an old and proven technology that has been
blessed with modern materials and manufacturing
methods.
Each switch consists of a glass tube that is filled
with an inert oxygen-free atmosphere and sealed with
tiny leads protruding from either end. These leads
extend into the tube and overlap one another with a
separation of a few thousandths of an inch. The leads
are made from a ferrous material that is influenced by
a magnetic field. They are first plated with gold as a
base material, then with rhodium and ruthenium.
Ruthenium is the best contact material known. The
glass assembly is then placed in the center of a multi-
layer coil of copper wire. The entire assembly is molded
together in a tough shock absorbing plastic. The switch
and coil connectors extend from the bottom in the form
MclNTOSH LABORATORY INC., 2 CHAMBERS STREET, BlNGHAMTON, NEW YORK 13903
C39 Product Preview/Page 7