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| JL Audio - M1000/5v2 Owner’s Manual
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Crossover Setup for Tri-Amplified System
with one M1000/5v2:
First go to the “SUB CH.” control section
and select “12dB” or
“
24dB
”
(low-pass) on the
“LP Filter Mode” switch and an appropriate
“Filter Freq.” (80 Hz is a good starting point).
The “12dB” setting engages a shallow filter slope
that gradually attenuates frequencies above the
selected “Filter Freq.” setting. The “24dB” setting
engages a sharper filter slope that more aggressively
attenuates frequencies above the selected “Filter
Freq.” setting. Neither setting is inherently
“better”, but in general, the shallower “12dB”
setting is more desirable for a subwoofer having
to fire from a trunk into the cabin of a sedan or
coupe. The sharper “24dB” setting is typically
better in a hatchback, SUV or wagon application.
Experiment to find the slope setting that results in
the smoothest subwoofer to midbass transition.
Next, turn your attention to the “CH 3 &
4” Controls and select “BP” (bandpass) on the
“Filter Mode” switch. A bandpass filter is actually
composed of two filters (one high-pass and one
low-pass), which in combination allow a defined
“band” of frequencies to pass through the amplifier
channels and on to the speakers. These are ideal for
actively filtered mid-bass or mid-range speakers in
automotive sound systems.
Now that you have engaged Bandpass Mode
for Channels 3 & 4, select an appropriate “Filter
Freq.” (again, 80 Hz is a good starting point). The
Filter Frequency you are adjusting with this control
is the high-pass portion of the bandpass filter. The
low-pass portion is automatically set by the tweeter
channel’s “Filter Freq.” adjustment (CH 1 & 2). The
low-pass portion of the bandpass filter will always
track with the CH 1 & 2 “Filter Freq.” setting.
Finally, turn your attention to the “CH 1
& 2” Controls and select “x10” (high-pass)
on the “HP Filter Mode” switch. This switch
position multiplies the indicated “Filter
Freq.” value by a factor of 10, so that an
indicated frequency of 500 Hz is actually a
filter frequency of 5000 Hz (5 kHz). The filter
slope for this section is fixed at 12dB/octave.
Now, select an appropriate “Filter Freq.” for
your tweeters (5000 Hz is a good starting point).
Before attempting any lower frequency settings,
consult the documentation for the tweeters you
are using and make sure you will not be driving
the tweeters with frequencies lower than they are
designed to handle. JL Audio mobile component
tweeters should not be operated with Filter
Frequencies lower than 3 kHz.
After proper adjustment of the “Input
Sens.” controls for both main channel
pairs and the subwoofer channel using the
method shown in Appendix A (page 14),
you can fine tune filter frequencies and
attenuate either pair of channels to achieve
proper balance. For precise filter frequency
information refer to Appendix B (page 15)
To operate two M1000/5v2’s in Tri-Amplified
mode (one for left channel and the other for right
channel), set the “Input Mode” switches of both
amplifiers in “2 Ch.” mode, and apply the left
channel signal to both the left and right inputs of
the first amplifier’s Channel 1 & 2 Inputs, using
an RCA y-adaptor with one female and two male
ends. Then apply the right channel signal to both
the left and right inputs of the second amplifier’s
Channel 1 & 2 inputs, using a second RCA
y-adaptor with one female and two male ends.
serViCing Your Jl audio amPliFier
If your amplifier fails or malfunctions, please
return it to your authorized JL Audio dealer so
that it may be sent in to JL Audio for service.
There are no user serviceable parts or fuses inside
the amplifier. The unique nature of the circuitry
in the JL Audio amplifiers requires specifically
trained service personnel. Do not attempt
to service the amplifier yourself or through
unauthorized repair facilities. This will not only
void the warranty, but may result in the creation
of more problems within the amplifier.
If you have any questions about the installation or
setup of the amplifier not covered in this manual,
please contact your dealer or technical support.
Jl audio technical support:
(954) 443-1100
9:00 AM – 5:30 PM (Eastern Time Zone)
Monday - Friday
sYstem ConFigurations
The M1000/5v2 is a very flexible amplifier, well-
suited for a multitude of system configurations. In
this section, the most likely configurations for a
system with a single M1000/5v2 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 mobile audio is to drive a
subwoofer system from one or more amplifiers or
channels and component speakers from separate
amplifiers or channels.
The M1000/5v2 can be configured to drive a
bi-amplified system by itself.
bi-amplified system with one m1000/5v2
In this configuration, the Subwoofer Channel
of the M1000/5v2 will drive a subwoofer system
with low-pass filtering. The Main Channels (1&2,
3&4) will drive component speakers in stereo
with high-pass filtering.
Crossover Setup for Bi-Amplified System
with one M1000/5v2:
Once the input sections have been configured
appropriately (see page 6), go to the “SUB CH.”
control section and select “12dB” or
“
24dB
”
(low-pass) on the “LP Filter Mode” switch and
an appropriate “Filter Freq.” (80 Hz is a good
starting point). The “12dB” setting engages a
shallow filter slope that gradually attenuates
frequencies above the selected “Filter Freq.”
setting. The “24dB” setting engages a sharper
filter slope that more aggressively attenuates
frequencies above the selected “Filter Freq.”
setting. Neither setting is “better”, but in general,
the shallower “12dB” setting is more desirable for
a subwoofer having to fire from a trunk into the
cabin of a sedan or coupe. The sharper “24dB”
setting is typically better in a hatchback, SUV or
wagon application. Experiment to find the slope
setting that results in the smoothest subwoofer to
midbass transition.
Next, turn your attention to the “CH 1 & 2”
Controls and select “x1” (high-pass) on the “HP
Filter Mode” switch and select an appropriate
“Filter Freq.” (again, 80 Hz is a good starting
point). The “x1” setting means that the Filter
Freq. indicated on the dial is exactly what you are
selecting. (In the “x10” mode, the actual Filter
Frequency is ten times higher than the indicated
value. This setting is generally not used in
bi-amplified systems.)
Finally, turn your attention to the “CH 3 & 4”
Controls and select “HP” (high-pass) on the “Filter
Mode” switch and select an appropriate “Filter
Freq.” (again, 80 Hz is a good starting point).
tri-amplified systems with one m1000/5v2
The M1000/5v2’s 3-way crossover capability
allows you to create true, tri-amplified systems by
selecting the appropriate settings described below.
In a tri-amplified configuration, the
Subwoofer Channel of the M1000/5v2 will
drive a subwoofer system, in mono, with
low-pass filtering. Channels 3 & 4 will drive
component woofers (or mid-range speakers) in
stereo with bandpass filtering (both a high-pass
and a low-pass filter applied). Channels 1 & 2
will drive high-frequency speakers (tweeters,
typically), in stereo, with high-pass filtering.
To operate a single M1000/5v2 in Tri-Amplified
mode, set the “Input Mode” switch in “2 Ch.”
mode, and apply a single set of stereo inputs to the
Ch. 1 & 2 Inputs only!
