Adjustments And Switches - Macrom 43 .05 Manuel D'emploi

ADJUSTMENTS AND SWITCHES

INPUT SELECTOR SWITCH
a) STEREO MODE. Select the "ST" position when the amplifier is used
as a 2-channel stereo system.
Note: Also in this case connection of the mid channel is possible (C+ C-).
b) MODE "L - MONO". Select the "L Mono" position when the amplifier
is used with only one input channel.
Note: Connect the leads coming from a single speaker to the terminals
(C+ C-) in order to obtain a BTL-connection (bridged).
In case stereo output is requested, connect a second amplifier in the
same way to the other speaker.
c) L + R MODE. Select the "L+R" position of the switch when the amplifier
is used for a subwoofer system using the right and left channel. Thus,
the two inputs are blended into one mono output signal portioned out
to the two channels or to one channel with twice the power, if the
subwoofer is connected to the mid channel (C+ C-)
LOW-BOOST SELECTOR SWITCH
a) "OFF"-MODE: In the "Off"-position the
amplifier has a linear response with no boosting
of the low frequencies.
b) "+3dB"-Mode: Select the "+3dB"-position to
slightly boost the low frequencies.
c) "+6dB"-Mode: Select the "+6dB"-position to
boost the low frequencies even more.
INPUT GAIN ADJUSTMENT CONTROL
The mid position (click) is used for the selection of an input sensitivity of 500
mV corresponding to the preamplified outputs of MACROM products.
In case 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) Set the volume control of your head unit to 3/4 of maximum output level.
b) Set the input gain control by means of a screwdriver from 2 V to 0.1 V
to the point where the maximum sound level with no distortion is
obtained.
9
L(Mono) ST L+R
L(Mono) ST L+R
L(Mono) ST L+R
OFF +3 +6dB
OFF +3 +6dB
OFF +3 +6dB
0.5V
2V 0.1V
0.5V
2V 0.1V