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6 | JL Audio - XD800/8v2 Owner’s Manual
TURNON OPTIONS
The XD800/8v2 can be switched on and off
using one of three methods, determined by the
position of the amplifier’s “Turn-On Mode”
switch. Please read these options and decide
which is best suited for your specific system.
1) +12V remote turn-on lead
2) Signal-sensing turn-on circuit.
3) DC offset-sensing turn-on circuit
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:
+12 V Remote Turn-On: This is the preferred
method for turning the amplifier on/off. The
amplifier will turn on when +12 V is present at
its “Remote” input and turn off when +12 V is
switched off. This +12V remote turn-on signal is
typically controlled by a source unit’s remote
turn-on wire. The XD800/8v2’s “Remote” turn-
on connector will accept 18 AWG – 12 AWG
wire. To connect the remote turn-on wire to
the amplifier, first back out the set screw on the
top of the terminal block, using the supplied 2.5
mm hex wrench. Strip 1/2 inch (12mm) of wire
and insert the bare wire into the terminal block,
seating it firmly so that no bare wire is exposed.
While holding the wire in the terminal, tighten
the set screw firmly, taking care not to strip the
head of the screw and making sure that the wire
is firmly gripped by the set screw.
If a source unit does not have a dedicated
remote turn-on output, consider one of the
following alternative turn-on options:
These methods are useful when a conventional
+12 V remote turn-on signal is not available in a
system. These allow you to operate the amplifier
without having to locate a remote turn-on lead at
the source unit, which can be very useful when
interfacing the amplifier with OEM (factory)
audio systems that do not use conventional +12 V
turn-on leads.
Depending on the characteristics of the audio
signal, one of the following methods may work
better than the other. We recommend trying DC
Offset-Sensing first as it does not require a long
delay to turn the system off after the signal is
shut off.
DC Offset-Sensing: The amplifier will turn on
and off by detecting the presence of a very small
DC signal (offset) that is typical in the audio
output of most OEM (factory) source units and
amplifiers. The amplifier will turn on and off in
reaction to the presence or absence of this DC
Offset. The sensitivity of this circuit is designed
for high-level (speaker level) signals, not for low-
level (preamp level) signals. The circuit monitors
the signal at the Channel 1 input only.
Signal-Sensing: The amplifier will turn on
and off by detecting the presence of a full-range
audio signal at its Channel 1 input. After several
minutes of no signal, the amplifier will shut off.
The sensitivity of this circuit is designed for
high-level (speaker level) signals, not for low-level
(preamp level) signals. The circuit is tuned to
react to signals at mid-range frequencies. This
prevents false switching from signals created by
moving loudspeakers that are in parallel with the
amplifier’s input signal.
IMPORTANT
!
In signal and DC sensing applications, the
amplifier’s “Remote” turn-on terminal becomes
a remote turn-on output. This allows the
XD800/8v2 to turn on other amplifiers in the
audio system that do not have signal sensing.
+12 VDC Ground Remote
Remote
Level
Control
CH. 5
(
L
)
CH. 6
(
R
)
CH. 3
(
L
)
CH. 4
(
R
)
CH. 1
(
L
)
CH. 2
(
R
)
Bridged
CH. 7
(
L
)
CH. 8
(
R
)
BridgedBridgedBridged
INPUT SECTION
(
L
)
(
R
)
CH. 1&2 CH. 3&4 CH. 5&6 CH. 7&8
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