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8 | JL Audio - XD800/8v2 Owner’s Manual
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.)
Remote
Level
Mode
All
|
5- 8
|
7&8
Input Mode
2 Ch.
|
4 Ch.
|
8 Ch.
CH. 7
(
L
)
CH. 8
(
R
)
CH. 7 & 8
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O
|
HP
|
LP
CH. 5
(
L
)
CH. 6
(
R
)
CH. 3
(
L
)
CH. 4
(
R
)
CH. 1
(
L
)
CH. 1 & 2
CH. 3 & 4 CH. 5 & 6
CH. 2
(
R
)
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O
|
HP
|
LP
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O
|
HP
|
LP
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O
|
HP
|
LP
CH. 1
CH. 2
CH. 3
CH. 4
CH. 5
CH. 6
(
L
)
(
R
)
CH. 7
CH. 8
INPUT SECTION
+12 VDC Ground Remote
8 Channel Amplifier
Turn-On
Mode
Rem.
|
Oset
|
Signal
Input Voltage
Low
|
High
2 Ch. Input 1 feeds CH. 1, CH. 3, CH. 5 & CH. 7
Input 2 feeds CH. 2, CH. 4, CH. 6 & CH. 8
4 Ch. Input 1 feeds CH. 1 & CH. 3
Input 2 feeds CH. 2 & CH. 4
Input 5 feeds CH. 5 & CH. 7
Input 6 feeds CH. 6 & CH. 8
8 Ch. Each input feeds its
corresponding output channel
INPUT MODES:
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.
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
of the XD800/8v2 can be used to eliminate
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.
Remote
Level
Mode
All
|
5- 8
|
7&8
Input Mode
2 Ch.
|
4 Ch.
|
8 Ch.
CH. 7
(
L
)
CH. 8
(
R
)
CH. 7 & 8
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O
|
HP
|
LP
CH. 5
(
L
)
CH. 6
(
R
)
CH. 3
(
L
)
CH. 4
(
R
)
CH. 1
(
L
)
CH. 1 & 2
CH. 3 & 4 CH. 5 & 6
CH. 2
(
R
)
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O
|
HP
|
LP
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O
|
HP
|
LP
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O
|
HP
|
LP
CH. 1
CH. 2
CH. 3
CH. 4
CH. 5
CH. 6
(
L
)
(
R
)
CH. 7
CH. 8
INPUT SECTION
+12 VDC Ground Remote
8 Channel Amplifier
Turn-On
Mode
Rem.
|
Oset
|
Signal
Input Voltage
Low
|
High
2 Ch. Input 1 feeds CH. 1, CH. 3, CH. 5 & CH. 7
Input 2 feeds CH. 2, CH. 4, CH. 6 & CH. 8
4 Ch. Input 1 feeds CH. 1 & CH. 3
Input 2 feeds CH. 2 & CH. 4
Input 5 feeds CH. 5 & CH. 7
Input 6 feeds CH. 6 & CH. 8
8 Ch. Each input feeds its
corresponding output channel
INPUT MODES:
1) “Filter Mode” Control: The XD800/8v2
employs a 12dB per octave filter for each
pair of channels. Each of these filters can be
configured independently into one of two filter
types or defeated completely by way of the
three-position “Filter Mode” switches:
“Off”: Defeats the filter completely, allowing
the full range of frequencies present at the inputs
to feed the amplifier. This is useful for systems
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