JL Audio NexD M800/8v2 Owner's Manual
OWNER’S MANUAL
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
Thank you for purchasing a JL Audio amplifier for
your marine sound system.
Your amplifier has been designed and manufactured to exacting
standards in order to ensure years of musical enjoyment in your vessel.
For maximum performance, we highly recommend that you have
your new amplifier installed by an authorized JL Audio dealer. Your
authorized dealer has the training, expertise and installation equipment
to ensure optimum performance from this product. Should you
decide to install the amplifier yourself, please take the time
to read this manual thoroughly so as to familiarize yourself
with its installation requirements and setup procedures.
If you have any questions regarding the instructions in this
manual or any aspect of your amplifier’s operation, please contact your
authorized JL Audio dealer for assistance. If you need further assistance,
please call the JL Audio Technical Support Department
at (954) 443-1100 during business hours.
800W Marine 8 Channel Amplier
2 | JL Audio - XD800/8v2 Owner’s Manual
3
Mounting the amplifier upside down is
strongly discouraged.
Safety Considerations:
Your amplifier needs to be installed in a dr y,
well-ventilated environ ment and in a manner
which does not i nterfere with your vess el’s factory
insta lled electronic dev ices. You should also take
the time to securely mou nt the amplifier using the
supplied screws so that it does not come loose in the
event of a colli sion or a sudden jolt to the vessel.
Stupid Mistakes to Avoid:
• Check before dril ling any holes in your vessel to
make sure t hat you will not be drilli ng throug h
the hull, a fuel tank, fuel l ine, wiring harness or
other vital vessel s ystem.
• Do not run system wiring out side or underneath
the vessel . This is a n extremely dangerous
practice w hich can result in severe damage to
your vessel a nd person.
• Protect all system wire s from sharp edges
(metal, fiberglass, etc.) by carefully routing
them, ty ing them down and usi ng grommet s
and loom where appropriate.
• Do not mount the amplif ier in the engine
compart ment or in any other area that will
expose t he amplifier circuitry to t he elements.
While t his amplifier is specially de signed
for marine applications, it is not waterproof
and it should not be mou nted where it is
likely to get wet.
PROTEC T YOUR HE ARING!
We value you as a long-term cu stomer. For
that reason, we urge you to practice rest raint in
the operat ion of this product so as not to da mage
your hearing and that of others in your vessel.
Studies have shown that cont inuous exp osure to
high sound pressure levels can lead to permanent
(irreparable) hearing loss. This a nd all other
high-power amplifiers are capable of producing
such high sound pressure levels when connected
to a speaker system. Please li mit your continuous
exposure to high volume levels.
While d riving, operate you r audio system
in a manner that sti ll allows you to hear necessar y
noises to operate your vessel s afely (horns,
sirens, etc.).
SERIAL NUMBER
In the event t hat your amplifier requires
service or is ever stolen, you will need to have
a record of the product’s seria l number. Please
take the time to enter t hat number in the space
provided below. The serial number can be fou nd
on the bottom panel of the amplifier and on the
amplifier packaging.
Serial Number:
INSTALLATION APPLICATIONS
This ampl ifier is designed for operation in
vessels with 12 volt, negat ive-ground electrical
systems. Use of this produc t in vessels with
positive ground and/or voltages other than 12V
may result in d amage to the product and w ill void
th e war rant y.
This produc t is not cert ified or approved for
use in ai rcraf t.
Do not attempt to “bridge” the outputs of this
amplif ier with the outputs of a second amplifier,
including an identica l one.
PLANNING YOUR INSTALLATION
It is important that you ta ke the time to read
this ma nual and t hat you plan out your
installation carefu lly. The following are some
considerations that you must t ake into account
when plann ing your instal lation.
Cooling Efficiency Considerations:
The outer shell of your JL Audio ampl ifier is
designed to remove heat from the a mplifier
circuit ry. For optimum cooling performance, this
outer shell shou ld be exposed to as large a volume
of air as possible. Enclosing the amplifier in a
small, p oorly ventilated chamber can lead to
excessive heat build-up and degraded
performa nce. If an instal lation calls for an
enclosure around the amplifier, we recommend
that this enclosure be ventilated with the aid
of a fan. In normal applications, fa n-cooling
is not necessary.
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
+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 Turn-On
Connector
(pg. 6)
Chassis Ground
Connector
(pg. 5)
Channels 1 & 2
Preamp Input Jacks
(pg. 7)
Channels 5 & 6
Preamp Input Jacks
(pg. 7)
+12 V Power
Connector
(pg. 5)
Channels 5 & 6
Speaker Outputs
(pg. 10)
Channels 7 & 8
Speaker Outputs
(pg. 10)
Channels 3 & 4
Speaker Outputs
(pg. 10)
Channels 1 & 2
Speaker Outputs
(pg. 10)
Jack for
Remote Level
Control Knob
(pg. 10)
Channels 3 & 4
Preamp Input Jacks
(pg. 7)
Channels 7 & 4
Preamp Input Jacks
(pg. 7)
4 | JL Audio - XD800/8v2 Owner’s Manual
5
favorite music.
POWER CONNECTIONS
Before installi ng the amplifier, disconnect t he
negative (ground) wire f rom the vessel’s batter y.
This will prevent accidental d amage to the system,
the vessel a nd your body during instal lation.
+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 C H. 7&8
The M800/8v 2’s “+12 VD C” and “Ground ”
connections are desig ned to accept 4 AWG
power wi re. 4 AWG is the required wire size for
this amplif ier.
If you are install ing the M800/8v2 wit h other
amplif iers and wish to use a single main power
wire, us e 2 AWG or 1/0 AWG main power wire
(depending on the overall c urrent dema nds of all
the ampli fiers in the system). This 2 AWG or
1/0 AWG power wire shou ld terminate into a
fused d istribution block mounted as close to
the ampli fiers as possible (with in 12 inches
/ 30cm of wi re length). The fused output of
the dist ribution block will connect to t he
M800/8v2 w ith 4 AWG power wire. JL Audio
ECS fus ed distribution blocks are recommended
(XD-FDBU-2 and XD-FDBU-4)
Note: Smaller AWG numbers mean bigger
wire and v ice-versa (1/0 AWG is the largest, 2
AWG is smal ler, then 4 AWG, then 8 AWG, etc.).
To connect the power wires to the a mplifier,
first back out the set screw on the top of t he
terminal block, using the suppl ied 2.5 mm hex
wrench. Strip 1/2 inch (12 mm) of insulation from
the end of each w ire and insert the bare wire i nto
the terminal block, seating it firm ly so that no
bare wire is exposed. Whi le holding the wire in
place, tig hten the set screw fir mly, taking care not
to strip the head of the screw.
The ground connection should be made using
the same gau ge wire as t he power connection.
Any wires run th rough barriers must
be protected w ith a high qualit y rubber
grommet to prevent damage to t he
insulat ion of the wi re. Failu re to do so
may result in a d angerous short circu it.
Many vessels employ small (10 AWG - 6 AWG)
wire to conne ct the alternator’s positive
connection to the batter y. To prevent voltage
drops, this wire shou ld be upgraded to 4 AWG
when insta lling amplifier systems with main
fuse rati ngs above 60A.
It is common for the a lternator to be grounded
through its chassi s. If the alternator is not
grounded t hrough its chassis a nd instead employs
a small (10 AWG - 6 AWG) wire to connect to
ground, t his wire should al so be upgraded to 4
AWG when inst alling ampli fier systems wit h main
fuse rat ings above 60A.
FUSE REQUIREMENTS
It is absolutely vital that the main power
wire(s) to the amplifier(s) in the system be
fused w ithin 18 inches (45 cm) of the positive
battery post connec tion. The f use value at each
power wire shou ld be high enough for all of the
equipment being run from t hat power wire. If
only the M800/8v2 is bei ng run from that power
wire, we recommend a 80A fuse be used.
If fusing the amplifier nea r its power
connections (when more than one a mp is being
run from t he main power wire), use a 80A fuse.
MAX I™ (big plastic-body) fuses
are recommended.
PRODUCT DESCRIPTION
The JL Audio M800/8v2 is an eight-chan nel,
full-range audio a mplifier utili zing JL Audio
NexD™ ult ra-high speed sw itching technolog y to
deliver outst anding fidelit y and efficiency.
The M800/8v 2 can be operated with a wide
variet y of source units and system conf igurat ions.
TYPICAL INSTALLATION SEQUENCE
The followi ng represents the sequence for a
typical ampli fier installation. Addit ional steps
and dif ferent procedures may be required in some
applications. If you have any questions, please
contact your aut horized JL Audio dealer for
assistance.
1) Disconnec t the negative batter y post
connection and secu re the disconnected cable
to prevent accidental re-connection dur ing
installation. This step is not optional.
2) Run 4 AWG power wire from the battery
location to t he amplif ier mounting location,
taki ng care to route it in such a way that it
will not be damage d and will not interfere
with vessel operation. Use 2 AWG or larger
power wire and a power distribution block if
additiona l amplifiers are being inst alled w ith
the M800/8v2.
3) Connec t power wire to the positive battery
post. Fuse t he wire with an appropr iate fuse
block (and connectors) within 18 inches (45
cm) wire length of the positive battery post.
This fus e is essential to protect t he vessel.
Do not insta ll the fuse until t he power wire
has been sec urely connected to the a mplifier.
4) Connect negative power w ire to the negat ive
battery post. Use the same size power
wire as the w ire connected to the “+12 V”
connection (minimum 4 AWG).
5) Ru n signal cables and remote turn-on wire
from the sou rce unit to t he amplif ier
mounting location.
6) Run speaker cable f rom the speaker systems
to the amplifier mounting locat ion.
7) Secu rely mount the amplifier.
8) Connect the positive a nd negative power
wires to t he amplifier. A fuse near
the ampli fier is not necessar y if the
M800/8v2 is t he only device being r un
from the fused mai n power wire. If
the fused main power wire is sha red
by the M800/8v2 and other a mplifiers
or devices, fuse each amplifier/device
withi n 12 inches (30 cm) of wire length,
via a fused dist ribution block or multiple
individual fuse blocks/on-boa rd fuses.
9) Connect the remote turn-on wire
to the amplifier.
10) Connect the input cables to t he amplifier.
11) Con nect the speaker cables to t he amplifier.
12) Carefully review the amplifier’s control
setti ngs to make su re that they are set
according to the needs of t he system.
13) Install the power wire f use (80A for a
single M80 0/8v2) and reconnect the negative
battery post terminal. Instal l the fuse (80A)
near the a mplifier (if applicable).
14) Turn on the source unit at a low level
to double-check that the a mplifier is
config ured correctly. Resist t he temptation
to crank it up until you have verified the
control settings.
15) Make necessary adjustments to t he input
sensitiv ity controls to obtain t he right
overall out put and the desired balance
in the system. See Appendix A (page 14)
for the recommended input sensit ivity
setting method.
16) Enjoy the f ruits of your labor wit h your
6 | JL Audio - XD800/8v2 Owner’s Manual
7
INPUT SECTION
The M800/8v 2’s input section a llows
you to send signa ls to the amplifier
section t hrough the use of two, fou r or
eight dif ferential-balanced inputs.
Input connect ions are via four pairs of
tradit ional RCA-type jack s.
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 C H. 7&8
Remote
Level
Mode
All | 5- 8 | 7&8
Input Mode
2 Ch. | 4 Ch. | 8 Ch.
CH. 7 & 8
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O | HP | LP
CH. 1 & 2
CH. 3 & 4 CH. 5 & 6
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
Rem. | Oset | Signal
Input Voltage
Low | High
If you wish to send eight discrete channels into
the M800/8v2, simply use all eight inputs and set
the “Input Mode” switch in t he “8 Ch.” position.
If you wish to feed all eight channels by using
only four cha nnels of input, set the “Input Mode”
switch to “4 Ch.” and use only the inputs to
channels 1, 2, 5 and 6. In t his mode, input 1 will
feed channels 1 and 3, input 2 w ill feed channels
3 and 4, input 5 w ill feed channels 5 and 7 and
input 6 wil l feed channels 6 and 8.
If you wish to use only two channels of i nput
to deliver signal to al l eight amplifier channels,
set the “Input Mode” switch to “2 Ch.” and
use only the inputs to cha nnels 1 and 2 . In this
mode, input 1 will feed a ll the odd-numbered
channels (1, 3, 5 and 7) and input 2 wil l 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
CH. 8
CH. 7 & 8
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O | HP | LP
CH. 5
CH. 6
CH. 3
CH. 4
CH. 1
CH. 1 & 2 CH. 3 & 4 CH. 5 & 6
CH. 2
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
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)
Input Voltage Range:
Input Voltage Range: A w ide range of sig nal
input voltages c an be accom modated by the
M800/8v2’s input sec tion (200mV – 8V). This
wide range is split up into t wo sub-range s,
accessible v ia the “Input Voltage” switch:
“Low”: for preamp level signa ls
“Hi gh”: for speaker level signal s
Remote
Level
Mode
All | 5- 8 | 7&8
Input Mode
2 Ch. | 4 Ch. | 8 Ch.
CH. 7 & 8
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O | HP | LP
CH. 1 & 2 CH. 3 & 4 CH. 5 & 6
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. 3
CH. 5
(L)
CH. 7
Turn-On
Mode
Rem. | Oset | Signal
Input Voltage
Low | High
The “Low ” position on the “Input Voltage”
switch sele cts an i nput sensitiv ity range between
200mV and 2V for all i nput channel s. This me ans
that the “I nput Sens.” rotary control for each
channel section will operate within that voltage
window. If you are using a source unit wit h
conventional preamp-level out puts, this is most
likely t he position that you wil l use
The “Hig h” position on the “Input Voltage”
switch sele cts an i nput sensitiv ity range between
800mV and 8V for all input channels. This is
usefu l for certa in high-output preamp level
signals as well as speaker-level output from source
units and small a mplifiers. To use speaker-level
sources, splice the speaker output wires of t he
source un it or small amplif ier onto a pair of RCA
cables or plugs or use the J L Audio ECS Speaker
Wire to RCA adaptor (XD-CLRAIC2-SW).
Line Output Converters are usua lly not needed
with the M800/8v2 . If you find that the out put
cannot be re duced suf ficiently with a direct
speaker level signa l applied to the amplif ier and
the “Input Voltage” sw itch in its “High” position,
you may use a “ line output converter” or voltage
divider to re duce the signal level.
TURNON OPTIONS
The M800/8v 2 can be sw itched on and off
using one of th ree methods, determ ined by the
position of the amplif ier’s “ Turn-On Mode”
switch. Ple ase read these option s and decide
which is best suited for your specif ic system.
1) +12V remote turn-on le ad
2) Signal-sensing tur n-on circu it.
3) DC offset-sensing tur n-on circuit
Remote
Level
Mode
All | 5- 8 | 7&8
Input Mode
2 Ch. | 4 Ch. | 8 Ch.
CH. 7 & 8
Filter Mode
Filter Freq. (Hz)
Input
Sens.
O | HP | LP
CH. 1 & 2 CH. 3 & 4 CH. 5 & 6
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. 3
CH. 4
CH. 5
CH. 6
(L)
(R)
CH. 7
CH. 8
Turn-On
Mode
Rem. | Oset | Signal
Input Voltage
Low | High
+12 V Remote Turn-On : This is the preferred
method for tu rning the amplifier on/off. T he
amplif ier will turn on when +12 V is present at
its “Remote” input and turn off when +12 V is
switched of f. This +12V remote turn-on signa l is
typically cont rolled by a source unit’s remote
turn-on wire. The M800/8v2’s “Remote” turn-on
connector w ill accept 18 AWG – 12 AWG wire. To
connect t he remote tur n-on wire to t he amplifier,
first back out the set screw on the top of t he
terminal block, using the suppl ied 2.5 mm hex
wrench. Strip 1/2 inch (12mm) of wire a nd insert
the bare w ire into the termina l block, seating it
firm ly so that no bare wire is exposed . While
holding the wire in t he terminal, tig hten the set
screw fi rmly, tak ing care not to strip t he head of
the screw a nd making sure that the wire is fir mly
gripped by t he set screw.
If a source un it does not have a dedicated
remote turn-on output, consider one of t he
following a lternative turn-on options:
These met hods are us eful when a conventional
+12 V remote turn-on signal is not available in a
system. These allow you to operate the amplif ier
without hav ing to locate a remote turn-on lead at
the source u nit.
Depending on the cha racteristics of the audio
signal, one of the following methods may work
better t han the other. We recommend trying DC
Offset-Sensing first as it does not require a long
delay to turn the system off af ter the signal is
shut off.
DC Offset-Sensing: The a mplifier will turn on
and off by detecting the presence of a very smal l
DC signa l (of fset) that is typic al in the audio
speaker out puts of most source units a nd small
amplif iers. The amplifier will turn on a nd off in
reaction to the presence or absence of t his DC
Offset . The sensit ivity of t his circuit is desig ned
for high-level (spea ker level) signals, not for lowlevel (preamp level) signals . The circu it monitors
the signa l at the Channel 1 i nput only.
Signal-Sensi ng: The amplifier w ill turn on
and off by detecting the presence of a f ull-range
audio signa l at its Channel 1 input. After several
minutes of no sig nal, the amplif ier will shut off.
The sensitivity of t his circ uit is desig ned for
high-level (spea ker level) signals, not for low-level
(preamp level) signals. The circuit is tuned to
react to signals at mid-range frequencies. This
prevents false switch ing from sig nals created by
moving loudspeakers that are in paral lel with the
amplif ier’s i nput signal.
In signal and DC sensing applications, the
am plif ier’s “Remote” turn-on terminal becomes a
remote turn-on output. Th is allows the M800/8v2
to turn on ot her amplifiers in t he audio system
that do not have sig nal sensi ng.
+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 C H. 7&8
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