Introduction - McIntosh MA6400 Owner's Manual

The Mclntosh MA6400 is an Integrated Amplifier with 100 watts per channel, combined with
a full featured remote controlled Preamplifier.
The MA6400 includes the popular Mclntosh features such as POWER GUARD, DC output
protection, thermal protection and Sentry Monitor protection circuits. Front panel power guard
indicators are included for each channel. Large illuminated front panel power level meters read
the power output of each channel to a high degree of accuracy.
The Preamplifier section can accommodate seven high level signal sources, or six high level
and one magnetic phono. All switching functions are performed with digital logic integrated
circuits driving ultra reliable, low distortion Electromagnetic switches. Bass and Treble controls
as well as an active Loudness control give the listener a wide range of options to shape the
frequency response to optimum for any listener preferences. All the circuit elements for these
controls are removed from the circuit path when the controls are in their flat settings. Rear panel
signal processor connections can be switched in or out of the circuit with a convenient switch.
Other features include two Tape Monitor switches, two Tape Copy switches and a
Headphone jack for private listening. The MA6400 can be muted with the Hand Held Remote
Controller. Refer to the Manual section TECHNICAL DESCRIPTION for further circuit and feature
information.
The MA6400 can be installed upright on a table or shelf, standing on its own plastic feet. It
can also be custom installed in furniture or cabinet of your choice. The required panel cutout
and unit dimensions are shown on a page near the back of this manual. Always provide
adequate ventilation for your MA6400. Cool operation insures the longest possible operating life
for any electronic instrument.
A custom cabinet installation should provide the following recommended minimum spacing
dimensions to insure adequate ventilation and cooling. Allow at least 1-1/2 inches (3.8cm) above
the unit so airflow is not obstructed. Allow at least 17-1/2 inches (44.5cm) behind the mounting
panel, which includes clearance for connectors. Allow 1-1/8 inches (2.9cm) in front of the
mounting panel for knob clearance.
In a custom cabinet Installation, It Is essential that the specified cutout be made In the
mounting shelf below the rear heat sink section of the MA6400 for adequate convection
cooling.

INTRODUCTION

INSTALLATION
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