7
INPUT SECTION
The M600/6-24V’s input section allows you
to send signals to the amplifier section through
the use of two or four differential inputs.
Input connections are made via one or two
pairs of traditional RCA-type jacks.
Ground
Remote
+24 VDC
NOT FOR USE IN 12V SYSTEMS!
If you wish to send six discrete channels into
the M600/6-24V, simply use all six inputs and set
the “Input Mode” switch in the “6 Ch.” position.
If you wish to feed all six channels by using
only four channels of full-range input, set the
“Input Mode” switch to “4 Ch.” and use only
the inputs to channels 1, 2, 3 & 4. In this mode,
channels 5 & 6 will operate with a sum of the 1 &
3 and 2 & 4 input signals, respectively.
If you wish to feed all six channels by using
two channels of full-range input plus two
channels of low-frequency input (subwoofer
output from the source unit), first set the
“Input Mode” switch to “6 Ch.”. Next, it will
be necessary to split the full-range signals with
y-adaptors and feed these signals into the inputs
to channels 1 & 2 and 3 & 4. The dedicated
subwoofer signal will be sent to channels 5 & 6.
If you wish to use only two channels of input
to deliver signal to all six amplifier channels,
set the “Input Mode” switch to “2 Ch.” and use
only the inputs to channels 1 & 2. In this mode,
Channels 3 & 5 will operate with the channel 1
signal and channels 4 & 6 will operate with the
Channel 2 signal.
Input Voltage Range:
The M600/6-24V’s input sections are designed
to accept signal voltages from 100mV – 4V. This
will accommodate all preamp level signals and
many speaker level signals.
To use speaker-level sources, simply splice the
speaker output wires of the source unit onto a
pair of RCA plugs for each input pair. (or use JL
Audio part XD-CLRAIC2-SW) No “line output
converter” is needed in most cases.
If you find that the output cannot be reduced
sufficiently with a direct speaker level signal
applied to the amplifier, you may use a “line
output converter” to reduce the signal level.
INPUT SENSITIVITY CONTROLS
The controls labeled “Input Sens.” located in
each channel section can be used to match the
source unit’s output voltage to the input stage of
each pair of amplifier channels for maximum
clean output. Rotating the control clockwise will
result in higher sensitivity (louder for a given
input voltage). Rotating the control counter-
clockwise will result in lower sensitivity (quieter
for a given input voltage.)
To properly set the amplifier for maximum
clean output, please refer to Appendix A (page
14) in this manual. After using this procedure,
you can then adjust any or all “Input Sens.”
levels downward if this is required to achieve the
desired system balance.
Do not increase any “Input Sens.” setting for
any channel(s) of any amplifier in the system
beyond the maximum level established during
the procedure outlined in Appendix A (page 14).
Doing so will result in audible distortion and
possible speaker damage.
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