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6 | JL Audio - XD800/8v2 Owner’s Manual
7
INPUT SECTION
The M800/8v2’s input section allows
you to send signals to the amplifier
section through the use of two, four or
eight differential-balanced inputs.
Input connections are via four pairs of
traditional RCA-type jacks.
+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
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
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:
Marine 8 Channel Amplifier
If you wish to send eight discrete channels into
the M800/8v2, simply use all eight inputs and set
the “Input Mode” switch in the “8 Ch.” position.
If you wish to feed all eight channels by using
only four channels of input, set the “Input Mode”
switch to “4 Ch.” and use only the inputs to
channels 1, 2, 5 and 6. In this mode, input 1 will
feed channels 1 and 3, input 2 will feed channels
3 and 4, input 5 will feed channels 5 and 7 and
input 6 will feed channels 6 and 8.
If you wish to use only two channels of input
to deliver signal to all eight amplifier channels,
set the “Input Mode” switch to “2 Ch.” and
use only the inputs to channels 1 and 2. In this
mode, input 1 will feed all the odd-numbered
channels (1, 3, 5 and 7) and input 2 will feed all
the even-numbered channels (2, 4, 6 and 8).
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
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:
Status
LED
(pg. 11)
Ch. 1 & 2 Filter
Frequency
Selector
(pg. 8)
Ch. 1 & 2
Filter Mode
Selection
(pg. 8)
Ch. 1 & 2 Input
Sensitivity Control
(pg. 7)
Ch. 3 & 4 Filter
Frequency
Selector
(pg. 8)
Ch. 3 & 4
Filter Mode
Selection
(pg. 8)
Ch. 3 & 4 Input
Sensitivity Control
(pg. 7)
Ch. 5 & 6 Filter
Frequency
Selector
(pg. 8)
Ch. 5 & 6
Filter Mode
Selection
(pg. 8)
Ch. 5 & 6 Input
Sensitivity Control
(pg. 7)
Ch. 7 & 8 Filter
Frequency
Selector
(pg. 8)
Ch. 7 & 8
Filter Mode
Selection
(pg. 8)
Ch. 7 & 8 Input
Sensitivity Control
(pg. 7)
Remote
Level Mode
Switch
(pg. 9)
Input
Mode
Switch
(pg. 7)
Input
Voltage
(pg. 7)
Turn-On
Mode
(pg. 6)
Marine 8 Channel Amplifier
Input Voltage Range:
Input Voltage Range: A wide range of signal
input voltages can be accommodated by the
M800/8v2’s input section (200mV – 8V). This
wide range is split up into two sub-ranges,
accessible via the “Input Voltage” switch:
“Low”: for preamp level signals
“High”: for speaker level signals
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
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:
Marine 8 Channel Amplifier
The “Low” position on the “Input Voltage”
switch selects an input sensitivity range between
200mV and 2V for all input channels. This means
that the “Input Sens.” rotary control for each
channel section will operate within that voltage
window. If you are using a source unit with
conventional preamp-level outputs, this is most
likely the position that you will use
The “High” position on the “Input Voltage”
switch selects an input sensitivity range between
800mV and 8V for all input channels. This is
useful for certain high-output preamp level
signals as well as speaker-level output from source
units and small amplifiers. To use speaker-level
sources, splice the speaker output wires of the
source unit or small amplifier onto a pair of RCA
cables or plugs or use the JL Audio ECS Speaker
Wire to RCA adaptor (XD-CLRAIC2-SW).
Line Output Converters are usually not needed
with the M800/8v2. If you find that the output
cannot be reduced sufficiently with a direct
speaker level signal applied to the amplifier and
the “Input Voltage” switch in its “High” pos i tion,
you may use a “line output converter” or voltage
divider to reduce the signal level.
TURNON OPTIONS
The M800/8v2 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
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:
Marine 8 Channel Amplifier
+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 M800/8v2’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.
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
speaker outputs of most source units and small
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.
In signal and DC sensing applications, the
amplifier’s “Remote” turn-on terminal becomes a
remote turn-on output. This allows the M800/8v2
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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