10
Power On
Press the Power Switch to on. The red LED to the right of
the switch lights to indicate the MA6850 is in standby
mode. For normal operation, turn the MA6850 on and off
with the Standby/On push-button. If the amplifier is not
going to be used for an extended time, turn off all AC
power with Power Switch. Refer to Figure 1.
NOTE: You may also turn on the MA6850 using the HR033
Remote Control.
Source Selection
Select the desired listening source with the LISTEN
Switch.
Volume Control
Adjust the VOLUME control for the desired listening
level.
Balance Control
Adjust the BALANCE control as needed to achieve ap-
proximately equal listening volume levels in each loud-
speaker. Turn the BALANCE to the Left to emphasize the
left channel by reducing the level of the right channel. Turn
the BALANCE to the right to emphasize the right channel
by reducing the level of the left channel.
Bass and Treble Controls
Adjust the BASS and TREBLE controls to suit your listen-
ing preferences. The bass or treble intensity can be in-
creased with clockwise rotation and decreased with coun-
terclockwise rotation. All tone control circuit elements are
How to Operate the MA6850
How to Operate the MA6850
removed from the signal path when the controls are in the
center or flat position.
Loudness Control
After first setting the desired listening volume, rotate the
LOUDNESS control clockwise to increase the intensity of
the bass according to your listening preference. When the
LOUDNESS control is in the fully counter clockwise or
flat position, all loudness circuit elements are removed
from the signal path.
Mono
Press the MONO push-button to combine left and right ste-
reo signals to mono at the PRE-AMP OUTPUTS and
Speaker Outputs.
Mute
Press the MUTE push-button to mute audio at the Preamp
and Speaker Outputs.
Listen Processor
Press the front panel Lis Proc (Listen Processor) push-but-
ton to select the signal processor that will affect the listen
channels. The normal listen signal will be sent out to the
Processor to be modified and then received back into the
listen channels. For example, a processor in the listen chan-
nels, such as an equalizer, can be used to modify the sound
that is heard in the loudspeakers to satisfy a specific
listeners needs.
Record Processor
Press the Rec Proc (Record Processor) push-button to se-
lect the processor that will affect all three record outputs.
The record signals will be sent out to the processor to be
modified and then received back to appear at the record
outputs. The type of processor used can modify the record
signals to make an improved quality recording. Any pro-
cessing used to modify the record output signal will not
affect the listen signals. To listen to the record signals at
any time, press the Rec Mon push-button.
Note: If a processor is connected and selected, the processor
must be on and operating or in bypass mode for signal
to pass through the system. If a processor is selected
and no processor is connected, no signal will pass
through.
Figure 1
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