Owner's Manual
Table Of Contents
SYSTEM
CONFIGURATIONS
The
M4300
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
M4300 can be configured to drive a
bi-amplified system by itself
or
with a separate
subwoofer amplifier.
Bi-Amplified System
with
one
M4300
In this configuration, channels 3&4
of
the
M4300 will drive subwoofers (stereo
or
bridged)
with low-pass filtering. Channels
1&2
will
drive
component
speakers in stereo with
high-pass filtering.
Input
connection options
for
a bi-amplified system
with one M4300 are as follows:
A)
No
User
Adjustability:
Required:
a basic source
unit
or
processor
with one
pair
of
stereo outputs.
Input
Connections:
a single pair
of
stereo source
unit outputs connected to the
"CH
1 (Left)"
and"CH
2 (Right)" inputs
of
the M4300 (select
"1&2" on the
"CH
3&4
Input
From" switch.
Result: the relative level
of
the
LF
and
HF
channels will be determined by
the
M4300's
"Input
Sens." settings
and
will not
be
user
adjustable from
the
front
of
the
vehicle.
-JL
AUDIO
M4300
B)
Fade
Subwoofer Level vs.
HF
Level
Required:
a source
unit
or
processor with two
pairs
of
stereo outputs.
Input
Connections:
the
first stereo
pair
source
unit
outputs
is
connected to the
"CH
1 (Left)"
and
"CH
2 (Right)" inputs
of
the
M4300. The
second stereo
pair
of
source
unit
outputs
is
connected to
the
"CH
3 (Left)"
and
"CH
4
(Right)" inputs (select
"Discrete"
on
the
"CH
3&4
Input
From"
switch).
Result:
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.
C)
Subwoofer
Level
Control
Only:
Required:
a source
unit
or
processor with
one pair
of
stereo outputs
and
dedicated
subwoofer outputs.
Input
Connections:
the
main
stereo
pair
of
source
unit
outputs
is
connected to the
"CH
1 (Left)"
and
"CH
2 (Right)" inputs
of
the
M4300.
The
source unit's dedicated subwoofer
output
is connected to the
"CH
3 (Left)"
and
"CH
4 (Right)" inputs (select "Discrete" on
the
"CH
3&4
Input
From"
switch).
Result: in this mode,
the
user has
the
ability to
control
the
absolute level
of
the
LF
channels
relative to
the
HF channels.
DIMPORTANTI
Set
the
"Input
Sens."
in
the
"Channel
3 &
4
Controls"
section
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 M4300:
Once the
input
sections have been configured
appropriately, go to
the
"Channel
3 & 4
Controls". Select "LP" (low-pass)
on
the
"Filter
Mode"
switch
and
an
appropriate
"Filter
Freq."
(80
Hz
is
a good starting point).
1 1