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Macrom 42.17 Manual

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MACROM INGLESE 42.15 - 42.17 17 FEBBRAIO 199311
ADJUSTMENTS AND SWITCHES
11
INPUT SELECTOR SWITCH
a) STEREO MODE. Select the "ST" (mid) position when the
amplifier is used as a 2-channel stereo system.
Note:Even in this case the connection is possible L + R -.
b) LEFT MODE "L - MONO". Select the "L - Mono" position when
the amplifier is used for only one channel of the stereo system
or for one bridged channel.
Note: Connect the leads coming from one speaker to the
terminals (L+ R-) in order to obtain a BTL-connection. In case
stereo output is requested, connect a second 42.15 / 42.17 in
the same way to the other speaker.
INPUT GAIN ADJUSTMENT CONTROL
In the mid position an input sensitivity of 500 mV is selected
corresponding to the preamplified outputs of MACROM products.
If the amplifier is to be connected to a head unit that is not of
MACROM make but is fitted with preamplified RCA outputs
proceed as follows:
a) Adjust the volume control of your head unit to 3/4 of a turn from
the maximum output level.
b) Turn the input control by means of a screwdriver and adjust
the input gain from 0.1 V to 2 V to the maximum sound level
where no distortion occurs.
c) L + R MODE. Select the "L+R" position when the amplifier is
used for a subwoofer system using the right and left channels.
Thus, the two inputs are blended into one mono output signal
divided between 2 channels or, one double power channel if
the Sub Woofer is connected to the central channel L + R .
L (MONO) ST L+R
L (MONO) ST L+R
L (MONO) ST L+R
GAIN
CONTROL
0.5V
0.1V2 V
GAIN
CONTROL
0.5V
0.1V2 V
… 10 …


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