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12 | JL Audio - M600/6 Owner’s Manual
13
D) Subwoofer Level Control Only:
Req uired: a source unit or processor with
one pair of stereo outputs and dedicated
subwoofer outputs.
Inp ut Connections: the stereo pair of source
unit outputs each split with a “Y-Adaptor”
allowing the left signal to be sent to the “CH
1 (Left)” and “CH 3 (Left)” inputs and the
right signal to be sent to the “CH 2 (Right)”
and “CH 4 (Right)” inputs of the M600/6. The
source unit’s dedicated subwoofer outputs are
connected to the “CH 5 (Left)” and
“CH 6 (Right)” inputs (select “6 Ch.” on the
“Input Mode” switch in the “Channel 5 & 6
Controls” section).
R e s u l t : in this mode, the user has the ability to
control the absolute level of the LF channels
relative to the HF channels.
E) Independent level control of all three
channel pairs:
R e q u i r e d : a source unit or processor with
two pairs of stereo outputs and dedicated
subwoofer outputs.
Inp ut Connections: one pair of stereo source
unit outputs is connected to the “CH 1 (Left)”
and “CH 2 (Right)” inputs, the second pair of
stereo source unit outputs is connected to the
“CH 3 (Left)” and “CH 4 (Right)” inputs and
the source unit’s dedicated subwoofer output
is connected to the “CH 5 (Left)” and “CH 6
(Right)” inputs (select “6 Ch.” on the “Input
Mode” switch.
R e s u l t : in this mode, the user has the ability to
control the absolute level of the LF channels as
well as both pairs of HF channels.
When using a source unit’s dedicated
subwoofer output, set the “Input Sens.” of any
channels receiving input from the subwoofer
output with the source unit’s subwoofer level
control set at 3/4 of full output. See Appendix A
(page 14) for details.
Crossover Setup for Bi-Amplified System
with one M600/6:
Once the input sections have been configured
appropriately, go to the “Channel 5 & 6
Controls”. Select “LP” (low-pass) on the “Filter
Mode” switch and an appropriate “Filter Freq.”
(80 Hz is a good starting point).
Next, turn your attention to the “Channel 1 &
2 Controls” and “Channel 3 & 4 Controls” and
select “HP” (high-pass) on the “Filter Mode”
switches and an appropriate “Filter Freq.” (again,
80 Hz is a good starting point).
After proper adjustment of the “Input
Sens.” controls for all three channel pairs
using the method shown in Appendix A
(page 14), you can fine tune filter frequencies
and attenuate any pair of channels to achieve
proper balance. For precise filter frequency
information refer to Appendix B (page 15).
SYSTEM CONFIGURATIONS
The M600/6 is a flexible amplifier, well-suited
for a multitude of system configurations. In
this section, the most likely configurations are
explained in detail.
Once you have selected your desired
configuration, you can use the amplifier panel
drawing on pages 18 & 19 to mark the required
switch positions for easy reference.
BIAMPLIFIED SYSTEMS
Bi-amplified systems are defined as systems
in which separate amplifier channels drive low-
frequency (LF) and high-frequency (HF) speakers
and are separately filtered to send appropriate
frequency ranges to each speaker system.
The most common application of
bi-amplification in marine audio is to drive a
subwoofer system from one or more amplifiers or
channels and component speakers from separate
amplifiers or channels.
The M600/6 is designed to work as the only
amplifier in a bi-amplified system.
Bi-Amplified System with the M600/6
In this configuration, channels 5&6 of the
M600/6 will drive subwoofers (stereo 75W x 2 at
4 ohms, 100W x 2 at 2 ohms, or bridged 200W x 1
at 4 ohms) with low-pass filtering. Channels 1&2
and channels 3&4 will drive component speakers
in stereo (75W x 4 at 4 ohms or 100W x 2 at 2
ohms) with high-pass filtering.
Input connection options for a bi-amplified system
with one M600/6 are as follows:
A) No User Adjustability:
R e q u i r e d : a basic source unit or processor
with one pair of stereo outputs.
Inp ut Connections: a single pair of stereo source
unit outputs is connected to the “Ch 1” and “Ch
2” inputs of the M600/6. Then, select “2 ch.” on
the M600/6’s “Input Mode” switch.
R e s u l t : the relative level of the LF and HF
channels will be fixed by the M600/6’s “Input
Sens.” settings and will not be user adjustable
from the helm (unless an optional HD-RLC is
connected the “Remote Level Control” port
and used as a subwoofer level control).
B) Fade Front vs. Rear with no Subwoofer
Level Control:
R e q u i r e d : a basic source unit or processor with
two pairs of stereo outputs.
Inp ut Connections: one pair of stereo source unit
outputs is connected to the “CH 1 (Left)” and
“CH 2 (Right)” inputs and the second pair
of stereo source unit outputs is connected
to the “CH 3 (Left)” and “CH 4 (Right)”
inputs of the M600/6 (select “4 Ch.” on the
“Input Mode” switch in the “Channel 5 & 6
Controls” section).
R e s u l t : the relative level of the LF and HF
channels will be fixed by the M600/6’s “Input
Sens.” settings and will not be user adjustable
from the helm, but the user will be able to fade
the signal from front to rear.
An optional HD-RLC can be connected the
“Remote Level Control” port and used as a
subwoofer level control, if desired.
C) Fade Subwoofer Level vs. HF Level:
R e q u i r e d : a basic source unit or processor with
two pairs of stereo outputs.
Inp ut Connections: the first stereo pair of source
unit outputs each split with a “Y-Adaptor”
allowing the left signal to be sent to the “CH
1 (Left)” and “CH 3 (Left)” inputs and the
right signal to be sent to the “CH 2 (Right)”
and “CH 4 (Right)” inputs of the M600/6.
The second stereo pair of source unit outputs
is connected to the “CH 5 (Left)” and “CH 6
(Right)” inputs (select “6 Ch.” on the “Input
Mode” switch).
R e s u l t : in this mode, the user has the ability to
fade or control the level of the LF channels
relative to the HF channels via the source
unit’s fader control without exceeding the
maximum clean output level set by each
amplifier section’s “Input Sens.” controls.
… 7 …

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