Page 1
Page 2
Page 3
499
799
1999
3199
4299
9
1099
LA-
LA-
LA-
LA-
LA-
Bridged Input Connection
REMOTE
BASS BOOST
POWER PROTECT
L
LOW IN
R
+
--
HI IN
R L
+
2CH AMPS
amplifier
to a second
head unit
Y adaptors
4CH AMPS
LA-
REMOTE
BASS BOOST
HI IN
CH2 CH1
CH1
LOW IN
CH2
CH3
LOW IN
CH4
HI IN
CH4 CH3
+
-+
POWER PROTECT
+
-+
head unit
Left Output
from 2 CH Audio Source
4 CH Bridged Input
CH1+2 = Left Channel
CH3+4 = Right Channel
Input Connections
inputs
Y adaptors
Right Output
REMOTE
BASS BOOST
CH1
LOW IN
CH2
CH3
LOW IN
CH4
1099
4CH AMPS
LA-
head unit
from 2 CH Audio Source
Low Level 4 CH Stereo Input
Right Output
+
--
HI IN
+
CH2 CH1
POWER PROTECT
+
--
HI IN
+
CH4 CH3
Y adaptors
Left Output
Low Level 4 CH Stereo Input
REMOTE
BASS BOOST
+
--
HI IN
+
CH2 CH1
CH1
LOW IN
CH2
POWER PROTECT
CH3
LOW IN
CH4
+
--
HI IN
+
CH4 CH3
head unit
from 4 CH Audio Source
L + R Front Outputs
L + R Rear Outputs
Input Connections
inputs
Page 4
499
799
1999
3199
4299
11
1099
LA-
LA-
LA-
REM
FUSE
R
L
LA-
2CH AMPS
LA-
4CH AMPS
LA-
Speaker Connections
+12V BATT
+12V BATT
GROUND
Basic Stereo Output
--
-
+
BRIDGED
+
+
REM
GROUND
FUSE
CH4
CH3
CH2
CH1
--
+
+
--
+
+
Basic 4CH Output
-
BRIDGED
+
-
BRIDGED
+
R
Speakers
REAR
speakers
RL
LEFT speaker RIGHT speaker
FRONT
speakers
L
REMOTE
BASS BOOST
CH1
LOW IN
CH2
CH3
LOW IN
CH4
1099
4CH AMPS
LA-
High Level 4 CH Stereo Input
from 4CH Audio Source
floating ground connection
orange
black
black
+
--
HI IN
+
CH2 CH1
wiring harness
POWER PROTECT
+
--
HI IN
+
CH4 CH3
head unit
orange
LR
LR
orange
black
black
orange
REAR FRONT
High Level 4 CH Stereo Input
from 4CH Audio Source
common ground connection
REMOTE
BASS BOOST
+
--
HI IN
+
CH2 CH1
CH1
LOW IN
CH2
POWER PROTECT
CH3
LOW IN
CH4
+
--
HI IN
+
CH4 CH3
head unit
orange
black
black
orange
RLRL
orange
black
black
orange
REAR FRONT
Input Connections
inputs
Page 5
AMPS
2499
MONO CHANNEL
LA-
13
REMOTE
BASS BOOST
L
LINE OUT
R
POWER PROTECT
L
LINE IN
R
Low Level Stereo Input Connection
TO SATELLITE AMPLIFIER
LINE INPUT
Outputs
L/R Audio
head unit
+12V BATT
REM
GROUND
FUSE
Speaker Output Connection
--
+
+
SPEAKER
MINIMUM
2~4 OHMS!
IMPEDANCE
subwoofer
Input Connections/Speaker Connection
inputs/Speaker
REM
499
799
LA-
LA-
+12V BATT
GROUND
FUSE
--
R
+
L
+
1999
LA-
Bridged Mono Output
-
BRIDGED
+
3199
4299
2CH AMPS
LA-
LA-
4 OHMS!
SPEAKER
MINIMUM
IMPEDANCE
speaker
+12V BATT
REM
GROUND
FUSE
CH4
CH3
CH2
CH1
2 CH Mono-Bridged Output
-
--
+
BRIDGED
+
+
--
-
+
BRIDGED
+
+
speakers
SPEAKER
MINIMUM
+12V BATT
REM
GROUND
FUSE
CH4
CH3
CH2
4 OHMS!
IMPEDANCE
CH1
LR
2 CH Stereo plus
Mono-Bridged
Subwoofer Output
speakers
4 OHMS!
SPEAKER
MINIMUM
IMPEDANCE
-
--
+
BRIDGED
+
+
--
-
+
BRIDGED
+
+
L R
Mono
Subwoofer
Speaker Connections
1099
4CH AMPS
LA-
Speakers
Page 6
15
4 ohm
4 ohm
Two 4-ohm speakers, wired in parallel
to a bridged two-channel amplifier.
will present a 2-ohm mono load to the
amplifier. MOST TWO-CHANNEL
AMPLIFIERS DO NOT SUPPORT 2-OHM
MONO OPERATION! AMPLIFIER DAMAGE
(Operating in
Bridged Mono)
2-channel Amplifier
STOP
4 ohm
2-channel Amplifier
(Operating in Stereo)
• Check for good ground connection.
• Check that remote DC terminal has at least +12v DC.
• Check that there is battery power on the + terminal.
• Check all fuses.
• Check that Protection LED is not lit. If it is lit, shut off amplifier
briefly and then repower it.
• Disconnect all RCA inputs to the amplifier(s) – if hiss/noise
disappears, then plug in the component driving the amplifier
COULD RESULT!
4 ohm
YES! NO!
Two 4-ohm speakers, wired in stereo,
will present a 4-ohm load to each
channel of the amplifier. Most two-
channel amplifiers will work well in this
configuration.
and unplug its inputs. If hiss/noise disappears, go on until the
faulty/noisy component is found.
• It is best to set the amplifier's input level as insensitive as
possible. The best subjective S/N ratio is obtainable this way.
Try to drive as high a signal level from the head unit as possible.
STOP
sound around, Inc.
1600 63rd street.brooklyn. ny 11204
• Check for shorts on speaker leads.
• Check that the volume control on the head unit is turned
down low.
• Remove speaker leads, and reset the amplifier. If the
Protection LED still comes on, then the amplifier is faulty.
4 ohm
4 ohm
4 ohm
4 ohm
NO!
Four 4-ohm speakers, wired in parallel
to a bridged four-channel amplifier,
will present a 4-ohm mono load to the
amplifier. MOST FOUR-CHANNEL
AMPLIFIERS DO NOT SUPPORT 2-OHM
MONO OPERATION! AMPLIFIER DAMAGE
(Operating in
4-channel Amplifier
Bridged Mono)
COULD RESULT!
Troubleshooting
4 ohm
4 ohm
4-channel Amplifier
(Operating in Stereo)
4 ohm
YES!
Four 4-ohm speakers, wired in stereo,
will present a 4-ohm load to each
channel of the amplifier. Most four-
channel amplifiers will work well in this
configuration.
4 ohm
troubleshooting
• Check that the minimum speaker impedance for that model
is correct.
• Check for speaker shorts.
• Check that there is good airflow around the amplifier. In
some applications, an external cooling fan may be required.
• Check that the Level control(s) is set to match the signal
level of the head unit.
• Check that all crossover frequencies are properly set.
• Check for shorts on the speaker leads.
• This is almost always caused by a poorly-grounded RCA
patch cord.
Amplifier will not power up.
High hiss or engine noise (alternator whine) in
speakers.
Protection LED comes on when the amplifier is
powered up.
Amplifier(s) gets very hot.
Distorted sound
High squeal noise from speakers.
Page 7
Protects the amplifier as well as the automobile electrical
system from short circuit conditions.
These terminals are 14K Gold plated for high conductivity
and minimum impedance loss. The terminals face
upwards for easy wiring in tight situations.
Speaker Terminals1
+
+
L
BRIDGED
+
R
-
--
GROUND
+12V BATT
Input Level Control
Power Supply Terminals
Use this control to match the output of the head unit
to the amplifier. If distortion is present, reduce the
Fuse
2
FUSE
REM
setting of this control.
4
3
1
2
3
HPF or LPF as needed.
Crossover Mode Switch
5
High Pass Control
Low Pass Control
Bass Boost Control
6
8
7
High Level Input (Low Impedance)
9
Permits you to adjust the crossover frequency from
80 Hz to 2.5 kHz to suit the tweeters
Permits you to adjust the crossover frequency from 35
Hz to 400 Hz to suit the subwoofers
Allows you to increase the bass signal level sent to the
speakers
In a full range system, set this to FULL. If the amp is
being used to power a crossover system, set to either
3
This LED is illuminated when the REMOTE ON
system is turned on.
Power LED Indicator
This unit is provided with gold-plated RCA input
jacks. Using RCA-RCA type patch cords, connect
these inputs to the RCA outputs from your head
unit.
Low Level Input (High Impedance)
Use these if your car stereo does not have
RCA output jacks: connect the speaker output from
the head unit to these inputs
11
10
The protection circuitry in the amp will disable it if it
senses an input overload, speaker short circuit, or
thermal overload conditions. Should this occur, the
PROTECT LED will be illuminated. At that time, it is
important that you check to determine what has caused
the protection circuitry to become activated.
If the amp shut off because of a thermal overload,
allow it to cool down before attempting to restart.
If the shutdown occured because of an input overload,
or speaker short circuit, be sure to correct these
conditions before attempting to restart the amp.
To reset the amp, turn the REMOTE power off and on
Protection LED Indicator
12
2.5k
Hz
HPF
80
400
Hz
LPF
35
+18db
BASS
0
BOOST
HPF
LPF
FREQ.
FULL
LEVEL
MIN MAX
again.
87
6
5
4
Remote Bass Boost
Plug in the Remote Bass Boost Control wire in here.
13
13
REMOTE
BASS BOOST
POWER PROTECT
11 12
L
10
LOW IN
R
+
--
9
HI IN
R L
+
2499
Mono channel amplifier
LA-
4299
LA-
2CH amplifier
Phase Control 0-180 degree
• Blue light illumination
•
• Remote Bass Control
• Input Impedance : 10K Ohms
• Soft Turn On/Off
• Advanced Protection Circuitry
• S/N Ratio:>90dB
3199
LA-
2CH amplifier
200W mono
335W mono
2600W mono
2 X 300W
2 X 450W
2 X 2100W
1 X 4200W
2 X 200W
2 X 300W
2 X 1550W
1 X 3100W
20-250Hz( 3dB)
10 k-Ohms
100 Ohms
2 OHM
STABLE
40 A
2-4 OHMS
4-8 OHMS
70 A
2-4 OHMS
4-8 OHMS
50 A
11.33 X 1.85 X 12
11.33 X 1.85 X 21
11.33 X 1.85 X 19
250 mV4V14.4 VDC/NEG GD
(10.5-16V)
(288 X 47 X 305)
7.36(3.34)
(288 X 47 X 532)
13.01(5.9)
(288 X 47 X 482)
11.46(5.2)
Features and Controls
-499/799/1999/3199/4299
LA
LA- 2499 also feature:
• Mono Block Subwoofer Amplifier
• 2 Ohm Stable
• MOSFET Power Supply
• Gold Plated RCA Inputs for Line Input & Bypass Output.
• Gold Plated Terminals for Speaker Output and Power Input.
• Thermal, Overload and Short Protection
• Variable Sub-sonic Filter (15Hz~40Hz, 24dB/Octave)
Legacy Sharp Steel Amplifier Features
• Variable Low-pass Filter (20Hz~250Hz, 24dB/Octave)
1999
LA-
2CH amplifier
2 X 125W
2 X 200W
RMS @ 4 OHMS
RMS @ 2 OHMS
Specifications
OUTPUT POWER
2 X 950W
1 X 1900W
10Hz-30 kHz
10 k-Ohms
100 Ohms
MAX OUTPUT
BRIDGE MODE
LOW LEVEL INPUTS
HIGH LEVEL INPUTS
FREQUENCY RESPONSE
INPUT IMPEDANCE
2-4 OHMS
250 mV
LOW LEVEL INPUTS
INPUT SENSITIVITY
4-8 OHMS
2.5V
14.4 VDC/NEG GD (10.5-16V)
HIGH LEVEL INPUTS
STEREO MODE
BRIDGED MODE
POWER SUPPLY VOLTAGE
MATCHING SPEAKER IMPEDANCE
30 A
11.33 X 1.85 X 15
(288 X 47 X 381)
9.04(4.1)
(mm)
Features and Specifications
MAXIMUM CURRENT DRAW
DIMENSIONS, W x H x L, inches
specs
NET WEIGHT, LBS (KG)
Page 8
Protects the amplifier as well as the automobile electrical
system from short circuit conditions.
These terminals are 14K Gold plated for high conductivity
and minimum impedance loss. The terminals face
upwards for easy wiring in tight situations.
Fuse
Speaker Terminals
2
1
Phase Shift Switch
Input Level Control
Use this control to match the output of the head unit
to the amplifier. If distortion is present, reduce the
setting of this control.
Power Supply Terminals
5
4
3
Adjustable from 20Hz to 250Hz with a slope of 24dB per
octave.This allows for the adjustment of the upper point
of the frequency bandwidth and the respective subwoofer.
Adjustable from 15Hz to 40Hz with a slope of 24dB per
octave.This allows for the attenuation of frequencies that
are mostly inaudible and cause unnecessary strain on the
amplifier.
Allows you to change the phase of your subwoofer
from 0 degree to 180 degrees to help compensate from
timing difference between drivers.
High Pass Subsonic Filter
Crossover Low Pass Filter
This unit is provided with gold-plated RCA input
jacks. Using RCA-RCA type patch cords, connect
these inputs to the RCA outputs from your head
Low Level Input (High Impedance)
8
7
6
5
The protection circuitry in the amp will disable it if it
senses an input overload, speaker short circuit, or
thermal overload conditions. Should this occur, the
PROTECT LED will be illuminated. At that time, it is
important that you check to determine what has caused
the protection circuitry to become activated.
unit.
Low Level Output (High Impedance)
This unit is provided with gold-plated RCA Output jacks.
Using RCA-RCA type patch cords, connect these Outputs
to the RCA Inputs for your anyther amplifier.
9
If the amp shut off because of a thermal overload,
Protection LED Indicator
10
allow it to cool down before attempting to restart.
If the shutdown occured because of an input overload,
or speaker short circuit, be sure to correct these
conditions before attempting to restart the amp.
To reset the amp, turn the REMOTE power off and on
again.
This LED is illuminated when the REMOTE ON
system is turned on.
Remote Bass Boost
Plug in the Remote Bass Boost Control wire in here.
Power LED Indicator
11
12
+
1
+
--
FUSE
2
GROUND
REM
3
+12V BATT
Protects the amplifier as well as the automobile electrical
system from short circuit conditions.
These terminals are 14K Gold plated for high conductivity
and minimum impedance loss. The terminals face
upwards for easy wiring in tight situations.
Speaker Terminals
1
Fuse
2
Power Supply Terminals
3
Input Level Control
Use this control to match the output of the head unit
to the amplifier. If distortion is present, reduce the
setting of this control.
4
HPF or LPF as needed.
Bass Boost Control
Crossover Mode Switch
5
High Pass Control
Low Pass Control
7
6
High Level Input (Low Impedance)
8
9
Permits you to adjust the crossover frequency from
80 Hz to 2.5 kHz to suit the tweeters
Permits you to adjust the crossover frequency from 35
Hz to 400 Hz to suit the subwoofers
Allows you to increase the bass signal level sent to the
speakers
In a full range system, set this to FULL. If the amp is
being used to power a crossover system, set to either
This LED is illuminated when the REMOTE ON
system is turned on.
Power LED Indicator
Low Level Input (High Impedance)
Use these if your car stereo does not have
RCA output jacks: connect the speaker output from
the head unit to these inputs
This unit is provided with gold-plated RCA input
jacks. Using RCA-RCA type patch cords, connect
these inputs to the RCA outputs from your head
unit.
11
10
Hz
67
15 40
250
Hz
15
LOW PASS SUB SONIC
SHIFT
PHASE
LEVEL
The protection circuitry in the amp will disable it if it
Protection LED Indicator
5
0 180
4
MIN MAX
senses an input overload, speaker short circuit, or
thermal overload conditions. Should this occur, the
PROTECT LED will be illuminated. At that time, it is
important that you check to determine what has caused
the protection circuitry to become activated.
If the amp shut off because of a thermal overload,
allow it to cool down before attempting to restart.
If the shutdown occured because of an input overload,
or speaker short circuit, be sure to correct these
conditions before attempting to restart the amp.
To reset the amp, turn the REMOTE power off and on
again.
12
12
REMOTE
BASS BOOST
L
LINE OUT
R
POWER PROTECT
11 10
L
8 9
LINE IN
R
Remote Bass Boost
Plug in the Remote Bass Boost Control wire in here.
13
Features and Controls
LA-2499
+
+
CH1
BRIDGED
1
+
CH2
-
--
+
+
CH3
BRIDGED
+
CH4
--
-
FUSE
2
GROUND
REM
3
+12V BATT
8 8
5 5
LEVEL
MIN MAX
+18db
HPF
LPF
FREQ.
BASS
0
BOOST
FULL
400
Hz
Hz
LPF
HPF
80 2.5k
35
400
Hz
Hz
LPF
HPF
80 2.5k
35
+18db
HPF
LPF
FREQ.
BASS
0
BOOST
FULL
LEVEL
CH 3/4 CH 1/2
MIN MAX
REMOTE
13
BASS BOOST
+
--
HI IN
9
+
CH2 CH1
7 6 4
CH1
10
LOW IN
CH2
POWER PROTECT
11 12
CH3
10
LOW IN
CH4
+
--
HI IN
9
+
CH4 CH3
4 6 7
Features and Controls
LA-1099
Page 9
499
799
1999
3199
7
4299
LA-
LA-
LA-
LA-
REMOTE
BASS BOOST
L
LOW IN
R
HI IN
R L
Low Level Stereo Input Connection
LA-
POWER PROTECT
+
-+
2CH AMPS
head unit
L/R audio outputs
PLEASE NOTE! If using high level
inputs, do not use the low level
RCA inputs at the same time!
REMOTE
BASS BOOST
POWER PROTECT
L
LOW IN
R
+
--
HI IN
R L
+
High Level Stereo Input Connection
wiring harness
head unit
orange
black
black
orange
LRLR
Input Connections
inputs
from speaker terminals
+12V BATT
REM
GROUND
FUSE
--
CH4
+
CH3
+
--
CH2
+
CH1
+
Making Power Connections
1. Connect the +12V terminal directly to the car battery (+) terminal.
+12V
turn-on
to remote
-
BRIDGED
+
-
BRIDGED
+
2. Connect the GROUND terminal directly to the car battery (-) terminal
OR to a good clean, paint-free chassis ground point.
3. To ensure a good ground, and to prevent “motor-boating” noise in the
system, make an additional connection from the car battery (-) terminal
to the chassis of the stereo unit, using 12 gauge minimum wire.
4. Connect the REMOTE terminal to an external switch for positive 12V
turnon-off. This may be connected to the head unit power antenna lead.
12V battery
head unit
(all models)
Electrical Connections
This amplifier comes complete with all mounting harware required. Please remember that this is a high-power unit, which generates considerable electrical energy and
heat. Therefore, be sure to install the unit in a place with sufficient airflow, a minimum of dust, and no moisture. Allow enough space around the cooling fins to permit
reasonable airflow and cooling.
• Before you drill or cut any holes, investigate your car’s layout very carefully. Take care when you work near the gas tank, fuel lines, hydraulic line and electrical wiring.
• Do not operate the amplifier when it is unmounted. Attach all audio system components securely within the automobile to prevent damage, especially in an accident.
Installation Precautions
• Do not mount this amplifier so that the wire connections are unprotected or in a pinched condition, or likely to be damaged by nearby objects. Be sure to select a
location inside your vehicle which has adequate ventilation.
• Before making or breaking power connections in your system, disconnect the vehicle 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, only replace it with a fuse identical to that supplied with the system. Using a fuse of a different type or rating may result in
damage to your system which isn’t covered by the manufacturer’s warranty.
After all electrical connections have been made, and physical installation is complete, turn on your stereo and listen for the amplifier to turn on. If there are any unusual
noises from the speakers, turn the stereo off and recheck ALL wiring.
Assuming the amplifier turn on normally, you may have to adjust the LEVEL control(s) to match the output levels from your head unit. Follow these steps:
1. Set the volume control on your head unit to about the 2/3 position.
2. Adjust the amplifier LEVEL control(s) to an average listening position.
3. Turn the head unit volume all the way down, and listen for background noise.
Setting Up and Turning On Your New Amplifier
4. Start your vehicle, and again, listen for background noise.
5. By fine tuning the LEVEL control(s), you can reduce background and engine noise, if present.
Electrical Wiring and Installation
These adjustments should only be made once. After that, use the head unit volume control to adjust the system volume, not the LEVEL control(s).
CAUTION: Never turn the LEVEL control(s) up any higher than you need to get clear sound at 2/3 volume on the head unit.
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