McIntosh MC7104, Руководство пользователя

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The MC7104 can be placed upright on a table or shelf, standing on its four plastic feet. It can
also be installed in a Mclntosh L84 cabinet. Follow the installation instructions included with the
L84.
The MC7104 is designed to be easily installed in a cabinet of your choice. The front mounting
panel cutout, mounting shelf ventilation cutout and amplifier dimensions are shown in the
diagrams found on a page further back in this manual.
Always provide adequate ventilation for the amplifier. The trouble free life of any electronic
instrument is greatly extended by providing sufficient ventilation for proper cooling. Allow at least
1-1/2 inches (3.8cm) above the heat sink area to allow the free flow of air. The recommended
minimum depth for mounting, including clearance for connectors, is 20 inches (51cm) behind
the front mounting panel. Clearance required in front of the mounting panel surface is 1 inch
(2.54cm).
In a system stack, the power amplifier should always be at the top. If all the components are
installed in a single cabinet, a quiet running ventilation fan can be a definite asset in maintaining
all the system components at their coolest possible operating temperatures.
If the MC7104 is mounted in a custom cabinet, cut out a ventilation hole in the
amplifier mounting shelf according to the recommended dimensions.
On the upper section of the front panel there is a Red POWER LED indicator for each pair of
channels. An indicator turns on when the speaker relays for that specific pair of channels turn
on. The relays respond to control signals sent from a Mclntosh Control Center to the POWER
CONTROL IN, or a Mclntosh Multizone System fed to the MULTI-ROOM IN connector. If the
MULTI-ROOM IN connector is not being used, both sets of speaker relays turn on simultaneously
when the main power is turned on.
There is a vertical row of LED power output indicators for each of the four channels. There
are also calibration indications for watts output from 0.01 watt to 100 watts. This calibration in
watts is valid when the amplifier is feeding 4 ohm loads. If the amplifier is connected to speakers
with a higher impedance, the indications refer to percentage of rated power output.
All four channels of the MC7104 incorporate the Mclntosh POWER GUARD circuit which
prevents output clipping with its harsh and damaging distortion. A front panel LED Power Guard
indicator is provided for each of the four channels. The LED lights whenever the Power Guard
circuit is activated for any particular channel. This indicates that the amplifier is producing its
maximum undistorted power output, and that you are being protected from overdrive and
clipping. The output level where Power Guard acts will be well above the rated power due to
conservative Mclntosh design philosophy.
(If the POWER GUARD indicators turn on and stay on continuously for any given pair of
channels, it indicates a problem is present. If this condition occurs, contact your Mclntosh dealer
for assistance.)
6
HOW TO
INSTALL
THE MC7104
FRONT PANEL
DISPLAYS