MR1950 说明书 转曲
MR1950
9-CHANNEL MOSFET
ИАН!
0813
3033
AUDIO SYSTEMS
3451 Lunar Court ® Oxnard, CA 93030
www.bossaudio.com
800.999.1236
tech support: www.bossaudio.com/support
XCE®
USER'S MANUAL
MR1950
9-CHANNEL MOSFET
MARINE POWER AMPLIFIER
3058
AUDIO SYSTEMS
3055 >
DUE US
MR1950 FiveChannel
High Power MOSFET
Marine Audio Amplifier
Congratulations on your
purchase of a 3055 Marine
Amplifier.
It has been designed, engineered
and manufactured to bring you
the highest level of performance
and quality, and will afford you
years of listening pleasure.
Thank you for making
393 Marine your choice for
AUDIO SYSTEMS
marine audio entertainment!
Marine MOSFET Amplifier User's Manual - page 1
USER’S MANUAL
page CONTENTS
2 Introduction
What is included?
Features
About 2 Ohm operation
General precautions
Protection circuitry
Installation precautions
Fuses
9 a a E E 6 © N
Mounting the amplifier
6/7 Connecting the amplifier
8/9 Low level input wiring
10 Power and speaker wiring
Five channel Mode
Bridged Mode
11 Troubleshooting
12 Specifications
Specifications
3055 »
MUST
Five Channel
Marine Amplifier
MODEL MR1950
RMS Power 120 Wx4 +
into 4 Q 300 Wx1
MAX Power 250 Wx4 +
into 2 Q 600 Wx1
Bridged Power 500 W x 2
into 4 Q
Min. Speaker 2 Q Stereo (CH1-CH5)
Impedance 4 Q Bridged (CH1/CH2,CH3/CH4)
THD+N < 0.01%
Frequency Response
S/N Ratio (A-Weighted)
Channel Separation
Low Pass Filter
High Pass Filter
Bass Boost
Input Mode Selector
Fuse Rating
Dimensions (Lx W x H) :
10 Hz - 45 KHz (CH1-CH4)
10Hz-150Hz(CH5)
103 dB
90 dB
40 Hz - 150 Hz
Fixed, 80 Hz (CH1-CH4)
Variable O - +18 dB (CH1-CH4)
2CH/4CH/5CH
External 80Ax 1 (AGU)
18.9" (L) x 7.32"(W)) x 2.09"(H)
All specifications subject to
change without notice.
Marine MOSFET Amplifier User's Manual - page 12
Troubleshooting
If you experience operation or performance problems with this product, compare your
installation with the electrical wiring diagram on the previous pages. If problems persist,
read the following troubleshooting tips which may help eliminate the problems.
SYMPTOM POSSIBLE REMEDY
Amplifier will not Check to make sure you have a good ground connection.
power up Check that the Remote Input (Turn-On) has at least 11VDC.
Check that there is battery power on the (+) terminal.
Check that there is at least 12v.
Check all fuses, replace if necessary.
Make sure that the Protection LED is not illuminated. If it is lit, shut off
the amplifier briefly, and then repower it.
Protection LED
comes on when
amplifier is
powered up
Check for short circuits on speaker leads.
Turn down the volume control on the head unit to prevent overdriving.
Remove speaker leads, and reset the amplifier. If the Protection LED still
comes on, then the amplifier is faulty and needs servicing.
No output
Check that all fuses are OK.
Check that amplifier is properly grounded.
Check that the Remote Input (Turn-On) has at least 11VDC.
Check that the RCA audio cables are plugged into the proper inputs.
Check all speaker wiring.
Low output
Reset the Level Control.
Check the Crossover Control settings.
Audio present in
only one channel
Check the RCA interconnect cables.
Check all speaker wiring.
High hiss in the
speakers
Disconnect all RCA inputs to the amplifiers. If the hiss disappears, then
plug in the component driving the amplifier and unplug its inputs. If the
hiss disappears at this point, go on until the faulty/noisy component is
found.
Itis best to set the amplifier's input level control as low as possible. The
best subjective signal-to-noise ratio is achieved in this manner. Try to set
the head unit as high as possible (without distortion) and the amp input
level as low as possible.
Distorted sound
Check that the Input Level Control is set to match the signal level of the
head unit. Always try to set the Input Level as low as possible.
Check that all crossover frequencies are properly set.
Check for short circuits on the speaker leads.
Amplifier gets
very hot
Check that the minimum speaker impedance for the amp model is correct.
Check that there is good air circulation around the amp. In some
applications, it may be necessary to add and external cooling fan.
Engine noise
(static type)
This is usually caused by poor quality RCA cables,which can pick up
radiated noise. Use only the best quality cables, and route them away
from power cables.
Engine noise
(alternator
whine)
Check that speaker leads are not shorted to the marine vessel chassis.
Check that the RCA grounds are not shorted to the marine vessel chassis.
Check that the head unit is properly grounded.
Check that the head unit is properly grounded.
Check signal cables are away from power cables.
Marine MOSFET Amplifier User's Manual - page 11
Introduction
With the 3935 Marine MOSFET
amplifier series, we are introducing
one new amplifier, designed
specifically for marine audio
installations. This new series includes
a 5-channel amplifier.
All 3938 Marine models feature both
high pass and low pass crossovers.
For further flexibility in the use of a
subwoofer, a variable bass boost
control has been included. You can
control the subwoofer level with the
remote level control module.
This BOSS Marine amplifier is
constructed using a special corrosion
resistant coating on the printed circuit
board to prevent damage from the
high humidity of the marine
environment.
In order to prevent the intrusion of
water into the amplifier enclosure, we
have provided the connections at the
end of waterproof wires/cables, and
tightly grommeted the wires as they
pass through the end panels.
An additional important, unique
compenent is the rubber pad which
seals all control openings.
803 Marine understands that
amplifiers are placed in many different
kinds of installations, so we have also
included an input sensitivity control to
help you integrate the amp into your
system regardless of the nature of your
input source.
What is included?
When first unpacking your new amplifier,
please check first that the package contains
all of the items below. If something is
missing, contact the store where you
purchased the player.
e Marine amplifier
e Speaker output cables with
connector (s)
e Remote level controller
e Four (4) mounting screws
e 80A external AGU fuse
Marine MOSFET Amplifier User’s Manual - page 2
Features
Your new 308$ Marine amplifier
AUDIO SYSTEMS
features the following:
* Class A-B operation
* Bridgeable outputs
* Stereo capable
* MOSFET PWM (Pulse Width
Modulated) Power Supply
* 2 Ohm stable stereo operation
with output power increase
* Thermal and speaker short
protection
e Soft turn-on circuit
* Remote turn-on/turn-off circuit
* Variable input gain control
* Variable low and fixed high pass
crossovers
* Variable bass boost (0 to +18dB)
e Exclusive protective coating on
PC board to prevent damage from
humidity
e LED power and protection
indicators
e Silver heatsink
e Remote subwoofer level control
Marine MOSFET Amplifier User's Manual - page 3
About 2 Ohm operation
Your 3938 Marine amplifier has been
designed to operate efficiently at loads
down to 2 Ohms. This means that you
can install four 8 Ohm speakers per
channel, when using parallel wiring.
Increasing the number of woofers per
channel at low frequencies (below
100Hz) produces an acoustic coupling
effect. This acoustic coupling effect
increases your power output by about
3dB per speaker, or the equivalent of
an additional 10W per speaker.
When operating at 2 Ohms, the
amplifiers will increase their output
power by approximately 50%. The
current draw will also increase by
about the same amount, so be sure
you have enough current to run the
amplifiers into a 2 Ohm load.
If you lack adequate current, your
music reproduction will be distorted.
Power and Speaker Wiring
5-Channel Amplifier
MR1950
=
Five
Channel
Mode /© © ®
= OSS Tae TT GROUND BATT+ REMOTE OUTPUT
Tork O
ar Inc
© ©
CH1
Speaker
FUSE
(Provided) CH1-CH4
SPEAKER
IMPEDANCE
to REMOTE TURN-ON _ mee J ] CH3 2-6 OHMS
terminal of head unit Speaker
PURPLE CHa
PURPLE/BLACK Speaker
CH5
CH5 SUBWOOFER
RED/BLACK Subwoofer EE Е
Bridged
Mode
©
300 > a
morme
FUSE
(Provided)
©
BATT+ REMOTE OUTPUT
Connect the CH1(+) lead to
the Bridged 1 (+) terminal .
Connect the CH2(-) lead to
the Bridged 1 (-) terminal.
WHITE
BRIDGED 1
GRAY/BLACK
snowmen se (SPEAKER
4-8 OHMS
GREEN —
Connect the CH3(+) lead to ras BRIDGED 2
the Bridged 2 (+) terminal.
Connect the CH4(-) lead to
the Bridged 2 (-) terminal .
RED
|
id SUBWOOFER
RED/BLACK
Connect the CH5(+) lead to
SUBWOOFER я
IMPEDANCE the Subwoofer (+) terminal.
ESE Connect the CH5(-) lead to
the Subwoofer (-) terminal .
Marine MOSFET Amplifier User's Manual - page 10
5=-Channel Amplifier with 2-channel Audio Input Source
MR1950
©
POWER (GREEN) CH 3/4 CONTROLS CHANNEL 5
FILTER jo ве
PROTECTION (RED) = FULL HP BOOST S. a ENS. AUDIO
O =D © a E INPUT MODE INPUTS
GROSSOVER 100 my-2Y 2V-8V 5CH 4CH 2CH
es 80H;
CROSSOVER E © © QE INPUT SENS. se
° e .
Red bie 5; FULL HP 40Hz 150Hz 8dB MIN UA 55 mV-2V 2V-8V, Mn wax 40Hz 150Hz
e SUBI РЕЯ CH 1/2 CONTROLS — FILTER FREQ. BOOST
Remote
Subwoofer Control
=F =O
INPUT MODE
. . a a '
Input Mode switch in mo om SUBIL hs
2CH Position SUBIR
5CH 4CH 2CH
O
EI EIC ICE IC
To L/R Audio Outputs
of head unit or signal
processor
Marine MOSFET Amplifier User's Manual - page 9
General precautions
Before installing and using your new
3058 Marine amplifier, please be-
come familiar with all the informa-
tion contained in this manual.
Please keep this manual in a safe
place for future reference.
* Do not open or attempt to repair this
unit yourself. Dangerous high voltages
are present which may result in electric
shock. Refer any repairs to a qualified
service technician.
e To avoid risk of electronic shock or
damage to the amplifier, do not permit
any of this equipment to become damp
or wet from water or drinks. If this does
occur, immediately unplug the power
wires and send the amplifier to your
local dealer or service center as soon
as possible.
e If there is smoke or any peculiar odor
present during use or if there is damage
to any of the component enclosures,
immediately unplug the power cord
and send the amplifier to your local
dealer or service center as soon as
possible .
SHOCK HAZARD! Do not open the case
of this product. There are dangerous
voltages present within the unit. There are
no user-serviceable parts within the unit.
Protection Circuitry
This amplifier incorporates special
protection circuitry which will disable
the amplifier if any of the following
should occur:
e [Input overload
* Short circuit
e Extremely high temperatures
If any of these conditions is detected,
the amplifier will go into a self-
preservation mode, and the PROTECT
LED on the model number badge on
top of the amplifier will be illuminated.
What should | do if my amplifier
PROTECT LED is illuminated?
If you observe that the PROTECT LED
is on, please check the system carefully
to determine what has caused the
protection circuit to engage.
To reset the amplifier when it is in
PROTECT mode, turn the power off to
the system (usually by turning off the
head unit or other signal source which
feeds the amplifier) and then turn it on
again.
If the amplifier has shut down due to
thermal overload, you should first allow
it to cool down before restarting.
If the shut down was due to either an
input overload or a short circuit, be sure
to correct these conditions before
attempting to power up the amplifier
again.
Marine MOSFET Amplifier User's Manual - page 4
Installation precautions
Before you drill or cut any holes,
investigate your vessel's layout very
carefully. Take special care when you
work near the gas tank, fuel lines,
hydraulic lines and electrical wiring.
Never operate the amplifier when it is
unmounted. Attach all audio system
components securely within the
amplifier to prevent damage, especially
in an accident.
Do not mount this amplifier so that
wire connections are unprotected, in
a pinched condition, in contact with
any metal surfaces in your marine
vessel, or likely to be damaged by
nearby objects.
Before making or breaking power
connections in your system,
disconnect the marine vessel battery.
Confirm that your head unit or other
equipment is turned off while
connecting the input jacks and speaker
terminals.
If you need to replace the power fuse,
replace it only with a fuse identical to
that supplied with the amplifier. Using
a fuse of a different type or rating may
result in damage to your audio system
or your amplifier which is not covered
by the manufacturer's warranty.
Marine MOSFET Amplifier User's Manual - page 5
Fuses
Power fuses protect both the amplifier
and the electrical system of your boat
from fault conditions. If you must
replace a fuse in your Marine amp, use
a fuse of exactly the same type and
rating. Using a different type or rating
of fuse may result in damage to your
amp or marine vessel or cause a fire.
Low Level Input Wiring
Low-level (RCA) input wiring is preferred for best audio performance. Always use
a high-quality RCA cable for best audio performance.
5-Channel Amplifier with 5-channel Audio Input Source
POWER (GREEN) CH 3/4 CONTROLS CHANNEL 5
PROTECTION (RED) o FULL FILTER FREQ. AUDIO
O ZW © Ta o 0] SENS. INPUT MODE INPUTS
CROSSOVER 5 Ze ae МОПИЗУ 294 Stn atm 25a
iz 80Hz
CROSSOVER a © © QE INPUT SENS.
o
LCL] FULL HP 40Hz 150Hz 0 e MIN ax E mY-2V 2V-8V, MN wax зоне 150 Hz
CH 1/2 CONTROLS FILTER FREQ. ee he, LP
emote = zZ B=
Subwoofer Control = Ва. —
MR СО INPUT MODE HEE zen] [me
Input Mode switch in = =~ Sen om
5CH Position SUBIR
5CH 4CH 2CH
mn | | | | |
TO Front, Rear and Sub Audio Outputs
of head unit or signal processor
5-Channel Amplifier with 4-channel Audio Input Source
POWER (GREEN) CH 3/4 CONTROLS CHANNEL 5
PROTECTION (RED) LP FULL HP or oon INPUT S
O NERO) a © O O E 0
CROSSOVER a 100 mV-2V 2V-8V 5CH 4CH 2CH я к
ganz 2
e 80
o
LP FULL HP 40H 150Hz 0 188 Mn MAX 100 mV-2V 2V-8V, Mi y MAX 40Hz 150Hz
CH1/2CONTROLS FILTERFREQ. peer SENS. LP
he
Input Mode switch in ~~
Subwoofer Control
MN =O
INPUT MODE
HR ec
CHI CH2 CH4 CH5
4CH Position SUBIR
5CH 4CH 2CH
es | | | | ||
TO Front and Rear Audio Outputs
of head unit or signal processor
Marine MOSFET Amplifier User's Manual - page 8
6. Connect all line inputs and outputs (if
used) using high-quality cables. Connect
all speakers, following the diagrams in
this manual. Be sure to observe proper
polarity to avoid audio phase problems.
7. Insert fuse(s) into the battery fuse
holder(s).
8. Recheck all connections before
powering up the amplifier.
9. Set all level controls to minimum
position, and set all crossover
controls/switches to the desired
frequency points.
10. Power up the head unit and the
amplifier. Then set the volume control
on the head unit to about 3/4 volume,
and adjust the amplifier's input level
control(s) to just below the level of
distortion.
11. Further fine tuning of the various
controls may be necessary to obtain best
results.
Marine MOSFET Amplifier User's Manual - page 7
Don't misuse the
level control!
Do not mistake the input level control
for a volume control! It is designed
ONLY to match the output level of
your audio source to the input level
of your amplifier.
Do not adjust this input level to
maximum unless your input level
requires it.
Ignoring these instructions will result
in an input overload to the amplifier,
and excessive audio distortion. It
can also cause the protection circuit
to engage.
Mounting the amplifier
1. Find a suitable location in the marine
vessel in which to mount the amplifier.
2. Make sure there is sufficient air
circulation around the intended
mounting location.
3. Mark the location for the mounting
hole screws by positioning the amplifier
where you wish to install it. Use a
scribe or mounting screw, inserted
through each of the amp's mounting
holes, to mark the mounting surface.
If the mounting surface is carpeted,
measure the hole centers and mark
with a felt tip pen.
4. Drill pilot holes in the mounting
surface for the mounting screws. Place
the amplifier in position, and attach
the amplifier to the mounting surface
securely using screws.
Connecting the amplifier
Before doing any wiring, look through
this manual and identify the diagrams
to follow for power, input and speaker
connections for your particular
installation. Be sure you understand
all the connections before you proceed.
1. Connect the ground terminal to the
closest point on the chassis of the
marine vessel. Keep this ground wire
to less than 39" (100 cm) in length.
Use 8 gauge (or heavier) wire.
2. Connect the remote terminal to the
remote output of the head unit using
16 gauge (or heavier) wire.
3. Connect an empty fuse holder within
18" (45 cm) of the boat’s battery, and
run 8 gauge (or heavier) cable from
this fuse to the amplifier location.
4. Check that the fuse holder is empty.
Then connect the fuse holder to the
"BATT+" connection on the amplifier.
5. If multiple amplifiers are being used
in your system, either:
* Run a separate pair of cables from
the battery and a chassis ground point
to each amplifier. Each (+) cable must
have its own inline fuse.
-Or-
e Run a 4 gauge cable from the fuse
holder at the battery to a distribution
block at or near the amplifier's location.
Then run separate cables from the
amplifier to this distribution block and
to independent chassis ground points.
Marine MOSFET Amplifier User's Manual - page 6
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