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8  |  JL Audio - XD1000/5v2 Owner’s Manual  
9
ENGLISH
Channel 3 & 4 Filter: 12dB/octave High-Pass  
or Bandpass Filter
 
  “Off”:
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the full range of frequencies present at the inputs 
to feed these channels. This is useful for systems 
utilizing outboard active crossovers or requiring 
full-range reproduction from this channel pair. 
  “BP” (High-Pass): Configures the filter to 
attenuate frequencies below the indicated filter 
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Frequency, at a rate of 12dB per octave.  This is 
useful for connection of mid-bass or mid-range 
speakers in a tri-amplified system.
  “HP” (High-Pass): Configures the filter  
to attenuate frequencies below the indicated  
filter frequency at a rate of 12dB per octave.  
This is useful for connection of component 
speakers or coaxials to this channel pair in a 
bi-amplified system.
Subwoofer Channel Filter: 12dB/octave  
or 24dB/octave, Low-Pass only
 
  “Off”:
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the full range of frequencies present at the inputs 
to feed this channel. This is useful for systems 
utilizing outboard active crossovers.
  “12dB” (Low-Pass): Configures the filter 
to attenuate frequencies above the indicated 
filter frequency, at a rate of 12dB per octave. 
This is useful for connection of subwoofers in a 
bi-amplified system. This shallower slope gently 
attenuates high-frequencies from your subwoofer 
signal and is often well-suited for sedans and 
coupes with trunks.
  “24dB” (Low-Pass): Configures the filter 
to attenuate frequencies above the indicated 
filter frequency, at a rate of 24dB per octave. 
This is useful for connection of subwoofers in 
a bi-amplified system. This sharper slope more 
aggressively removes high-frequencies from your 
subwoofer signal and is often well-suited for 
SUV’s, wagons and hatchbacks.
 
2)  “Filter Freq. (Hz)” The filter frequency 
markings surrounding these rotary controls 
(one in each Channel Section) are for reference 
purposes and are generally accurate to within 
1/3 octave or better. If you would like to select 
the filter cutoff frequency with a higher level 
of precision, consult the chart in Appendix B 
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Tuning Hint: 
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to drive a subwoofer system (
iLPw mode), and 
component satellite speaker systems (
iHPw mode), 
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After properly adjusting the 
iInput Sens.w, as 
outlined in Appendix A (page 14), you can fine 
tune the 
iFilter Freq. (Hz)w control to achieve the 
desired system frequency response.
REMOTE LEVEL CONTROL (OPTIONAL)
With the addition of the optional Remote Level 
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the subwoofer channel (Subwoofer Level) or of the 
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(Master Volume).
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of the amplifier using a standard telephone cable 
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multiple phone cables.
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operates as follows. At full counter-clockwise 
rotation, the audio of the selected channels will 
mute completely. At full clockwise rotation the 
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connected at all. In other words, it operates strictly 
as a level attenuator. 
Remote
Level
Mode
All | Sub Ch.
Input Mode
2 Ch. | 4 Ch. | 6 Ch.
Offset | Signal
t Voltage
w | High
CH. 1 &
HP Fi
Off
 
 “Remote Level Mode” Switch:  This switch allows 
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entire amplifier or only the subwoofer channel.  In 
the “All”
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channels equally. In the “Sub Ch.” position, only 
the level of the subwoofer channel will be affected 
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INPUT SENSITIVITY CONTROLS
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in each channel section can be used to match 
the source unit’s output voltage to the input 
stage of each channel bank 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.) 
 
CH. 1 & 2
CH. 3 & 4
SU
HP Filter Mode
Filter Freq. (Hz)
Input 
Sens.
Off | x1 | x10
Filter Mode
HP Filter Freq. (Hz)
Input 
Sens.
Off | BP | HP
O
 
To properly set the amplifier for maximum 
clean output, please refer to Appendix A (page 
14) in this manual. After using this procedure, 
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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.
FILTER CONTROLS
Most speakers are not designed to reproduce 
the full range of frequencies audible by the human 
ear. For this reason, most speaker systems are 
comprised of multiple speakers, each dedicated 
to reproducing a specific frequency range. Filters 
are used to select which frequency range is sent to 
each section of a speaker system. The division of 
frequency ranges to different speakers can be done 
with passive filters (coils and/or capacitors between 
the amplifier outputs and the speakers), which 
are acceptable and commonly used for filtering 
between mid-range speakers and tweeters. Filtering 
between subwoofer systems and satellite speaker 
systems is best done with active filters, which cut 
off frequency content at the input to the amplifier. 
Active filters are more stable than passive filters 
and do not introduce extraneous resistance, which 
can degrade subwoofer performance.
The active filter built into each channel section 
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potentially harmful and/or undesired frequencies 
from making their way through the amplifier 
sections to the speaker(s). This serves to improve 
tonal balance and to avoid distortion and possible 
speaker failure. Correct use of these filters can 
substantially increase the longevity and fidelity of 
your audio system. 
CH 1
CH. 1 & 2
CH. 3 & 4
CH 2
HP Filter Mode
Filter Freq. (Hz)
Input 
Sens.
Off | x1 | x10
Filter Mode
HP Filter Freq. (Hz)
Input 
Sens.
Off | BP | HP
 
1)  “Filter Mode” Controls
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employs 12dB per octave filters for each pair 
of main channels (one high-pass filter for 
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provides a low-pass filter with the option of 
12dB or 24dB / octave slopes. Each of these 
filters can be controlled or defeated completely 
by way of the three-position “Filter Mode” 
switches in each Channel Section:
Channel 1 & 2 Filter: 12dB/octave High-Pass 
only, with x10 multiplier switch
 
  “Off”:
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the full range of frequencies present at the inputs 
to feed these channels. This is useful for systems 
utilizing outboard active crossovers or requiring 
full-range reproduction from this channel pair. 
  “x1” (High-Pass): Configures the filter  
to attenuate frequencies below the indicated  
filter frequency at a rate of 12dB per octave. 
This is useful for connection of component 
speakers or coaxials to this channel pair in a 
bi-amplified system. 
  “x10” (High-Pass): Configures the filter to 
attenuate frequencies below a frequency TEN 
TIMES HIGHER
 than the indicated filter 
frequency, at a rate of 12dB per octave. This is 
useful for connection of tweeters to this channel 
pair in a tri-amplified system.