Front Panel Controls Switches And Pushbuttons - McIntosh MA6400 Owner's Manual

FRONT PANEL
CONTROLS,
SWITCHES AND
PUSHBUTTONS
The MA6400 can be remotely controlled. Most of the operating functions performed at
the front panel, also can be done by the MA6400 Hand Held Remote Controller. The
following Information refers only to the front panel. Other sections of this manual explains
the functions and operation of the MA6400 Hand Held Remote Controller and the rear
panel connections.
The last page of this manual folds out to show drawings of the front and rear panels of
the MA6400. This will help you In Identifying and locating the front panel controls,
switches, pushbuttons and the rear panel connectors and switches. The letters and
numbers on the drawings refer to the Information that follows.
A. BASS AND TREBLE
Provides 12dB boost and cut. with neutral flat response at the center detent position. The
Bass and Treble controls affect the SPEAKERS 1 and 2, MAIN OUTPUTS and the HEAD¬
PHONES. The TAPE 1 and TAPE 2 OUTPUTS are not affected by the Bass and Treble controls.
B. WATTS POWER OUTPUT
Two illuminated WATT meters are provided on the MA6400 front panel. The meters are peak
responding and their circuits are constantly reading the output power required by the musical
information.
One additional calibration mark above 100 watts is on the meters. This mark is 200 watts,
(+3dB). The amplifier cannot produce a continuous 200 watts of power, but can produce well
above 100 watts on program peaks, especially into lower impedance loads.
The upper scale on the meters is calibrated in average watts power, and the lower scale in
decibels. The meter calibration lines reading from right to left, starting at the 100 watt indication
are as follows.
100 Watts Indicated
40
20
10 Wans indicated
4
2
1 Watts Indicated
0.4
0.2
0.1 Watts Indicated
0.04
0.02
0.01 Watts indicated
0.004
0.002
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