AMPLIFIERS
2CH
• LA-2100
4CH
•LA-4100
•LA-4200
5CH
• LA-51000
LA-2100
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X-OVER |
LOW |
BASS |
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L |
LEVEL |
HIGH |
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POWER |
INPUT |
PASS |
PASS |
BOOSTPROTECT |
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L |
R |
HP |
LP |
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FULL |
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HIGH LEVEL |
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INPUT |
4V 0.2V |
60Hz 1.2kHz 40Hz 150Hz |
0dB 12dB |
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R |
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LINE |
LINE |
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OUTPUT |
INPUT |
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GND REM +12V
POWER |
INPUT |
FUSE |
R |
L |
SPEAKER
OUTPUT
BRIDGED
LA-4100
INPUT |
CH3 |
CH1 |
LEVEL |
BASS BOOST |
HIGH PASS |
LOW PASS |
X-OVER |
CH3/CH4 |
INPUT MODE |
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HIGH LEVEL INPUT |
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4CH 2CH |
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CH3 |
CH4 4V |
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L |
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0.2V |
0dB |
12dB |
60Hz 1.2kHz |
30Hz 250Hz |
FULL LP HP |
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LINE |
CH4 |
CH1 |
CH2 |
0.2V |
0dB |
12dB |
60Hz 1.2kHz |
30Hz 250Hz |
X-OVER |
CH1/CH2 |
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CH2 |
4V |
FULL LP HP |
R |
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LINE |
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OUTPUT |
LA-4200
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LEVEL |
BASS |
LOW |
HIGH |
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CH3 |
CH1 |
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X-OVER |
BOOST |
PASS BPF PASS |
INPUTMODE |
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L |
LP/BP |
HP |
FULL |
4V |
0.2V |
0dB |
12dB |
30Hz 150Hz |
10Hz 1.2kHz |
CH4 CH2 |
CH3/CH4 |
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LP/BP |
HP |
FULL |
4V |
0.2V |
0dB |
12dB |
30Hz 150Hz |
10Hz 1.2kHz |
OFF ON |
CH1/CH2 |
CH4 |
CH2 |
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BASS REMOTE |
X-OVER |
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BPF |
TWINSUB |
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R |
PROTECT POWER |
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LINE OUTPUT |
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LINE INPUT |
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LA-51000
CH5 |
CH4 |
CH2 |
LEVEL |
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HPF |
LEVEL |
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HPF |
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INPUT |
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5V |
0.2V |
CH 3/4 |
10Hz |
150Hz MODE |
5V |
0.2V |
CH 1/2 |
10Hz |
150Hz |
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FULL HPF |
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CH4 CH5 |
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FULL HPF |
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LINE |
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X-OVER |
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X-OVER |
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REMOTE |
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CH 5 |
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CH 5 |
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5V |
0.2V |
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15Hz |
55Hz |
0dB |
12dB |
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30Hz |
150Hz |
PROTECT |
CH5 |
CH3 |
CH1 |
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LEVEL |
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SUBSONIC |
BASS EQ |
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LPF |
POWER |
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GND |
REM |
+12V |
POWER |
CH4 |
CH3 |
CH2 |
CH1 |
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PROTECT |
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POWER |
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INPUT |
FUSE |
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BRIDGED |
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BRIDGED |
SPEAKER OUTPUT
GND |
REM |
+12V |
CH1 |
CH2 |
CH3 |
CH4 |
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FUSE |
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POWER |
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INPUT |
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BRIDGED |
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BRIDGED |
SPEAKER OUTPUT
CH1 |
CH2 |
CH3 |
CH4 |
CH5 |
+12V |
REM |
GND |
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FUSE |
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POWER 
INPUT
BRIDGED |
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BRIDGED |
SPEAKER OUTPUT
Fuse(s): Value dependant on amplifier |
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Level Control: Adjust to match |
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Speaker Connector |
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power output |
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the output levels of the source unit. |
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Terminal: positive (+) & negative (-) |
Power Connector |
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Crossover Filter |
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Pass Thru Outputs: Out- |
Terminal: power (B+), ground (GND), & |
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Switch: full range (FULL), high-pass (HP), & |
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puts the same signal that is fed to the inputs. |
remote (REM) |
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low-pass (LP) |
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High Level Inputs: Use if the |
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Adjustable Crossover |
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Subsonic Control: Variable |
source unit has only speaker line outputs. |
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Frequency Control: 12db/Oct; |
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subwoofer high pass filter; 15Hz - 55Hz |
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30Hz - 1.2kHz |
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RCA Inputs: Line level from radio |
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Bass Boost: 0dB - 12dB |
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Input Mode Switch: Select |
pre-outs. |
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2CH, 3CH, 4CH or 5CH |
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Model |
LA-2100 |
LA-4100 |
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LA-4200 |
LA-51000 |
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Power |
MAX |
RMS |
MAX |
RMS |
MAX |
RMS |
MAX |
Rating |
100 x 2 @ 4Ω |
50 x 2 @ 4Ω 100 x 4 @ 4Ω |
50 x 4 @ 4Ω 200 x 4 @ 4Ω 100 x 4 @ 4Ω |
125 x 4 @ 4Ω / 400 x 1 @ 2Ω |
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200 x 2 @ 2Ω |
90 x 2 @ 2Ω 200 x 4 @ 2Ω |
75 x 4 @ 2Ω 400 x 4 @ 2Ω 150 x 4 @ 2Ω |
200 x 4 @ 2Ω / 500 x 1 @ 1Ω |
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400 x 1 @ 4Ω 180 x 1 @ 4Ω 400 x 2 @ 4Ω 150 x 2 @ 4Ω 800 x 2 @ 4Ω 300 x 2 @ 4Ω RMS |
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62.5 x 4 @ 4Ω / 200 x 1 @ 2Ω |
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100 x 4 @ 2Ω / 250 x 1 @ 1Ω |
Crossover |
12dB/Oct HP/AP/LP |
12dB/Oct HP/AP/LP/BP |
12dB/Oct HP/AP/LP/BP |
12dB/Oct HP/AP/LP |
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Crossover |
Variable |
Variable |
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Variable |
Variable |
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Frequency |
30Hz - 1.2kHz |
30Hz - 1.2kHz |
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30Hz - 1.2kHz |
30Hz - 1.2kHz |
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Subsonic |
N/A |
N/A |
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N/A |
Variable |
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Filter |
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15Hz - 55Hz |
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Bass Boost |
0 to +12dB @ 45Hz |
0 to +12dB @ 45Hz |
0 to +12dB @ 45Hz |
0 to +12dB @ 45Hz |
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(Remote Included) |
(Remote Included) |
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Inputs |
RCA / High Level |
RCA / High Level |
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RCA |
RCA |
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Fuse(s) |
15A(2) |
20A(2) |
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80A(1) |
80A(1) |
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Dimensions |
9.5” x 9.4” x 2.3” |
11.8” x 9.4” x 2.3” |
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16.5” x 9.4” x 2.3” |
20.3” x 9.4” x 2.3” |
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(LxWxH) |
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Installation
Preliminary Considerations:
•If you feel unsure about installing this system yourself, have it installed by a qualified technician.
•Think before you drill! Be careful not to cut or drill into gas tanks, fuel lines, brake or hydraulic lines, vacuum lines or electrical wiring when working on any vehicle.
•Aftermarket amplifiers will put an increased load on the vehicle’s battery and charging system, which can reduce battery and alternator life. It is strongly recommended to upgrade your factory alternator and battery for optimum performance from your new audio system.
CAUTION: Before installation, disconnect the battery negative (-) terminal to prevent damage to the unit, fire and/or possible injury.
1. Choose a mounting location that will be secure and offer plenty of unobstructed space for proper cooling. Then plan the wire routing. Keep RCA cables close together but isolated from the amplifier’s power cables and any high power auto accessories, especially electric motors. When feeding the wires through the firewall or any metal barrier, protect them with plastic or rubber grommets to prevent short circuits. Leave the wires long at this point to adjust for a precise fit at a later time.
NOTE: Never run wires underneath the vehicle.
2. Prepare the power cable for attachment to the amplifier by stripping 1/2” of insulation from the end of the wire. Insert the bared wire into the B+ terminal and tighten the setscrew to secure the cable in place.
3. Trim the power cable within 18” of the battery and strip1/2”of insulation from the end of the wire.
4. Strip 1/2” from the battery end of the power cable and crimp a large ring terminal to the cable. Use the ring terminal to connect to the battery positive terminal. DO NOT install the fuse at this time.
NOTE: ALWAYS protect the battery and electrical system from damage with proper fusing.
5. Prepare the chassis ground by scraping any paint from the metal surface and thoroughly clean the area of all dirt and grease. Strip the end of the wire and attach a ring connector. Fasten the cable to the chassis using a non-anodized screw and a star washer. Prepare the grounding cable for attachment to the amplifier by stripping 1/2” of insulation from the other end of the wire. Insert the bared wire into the GND terminal and tighten the setscrew to secure the cable in place. 6. Prepare the REM turn-on wire for connection to the amplifier by stripping 1/2” of insulation from the wire end. Insert the bared wire into the REM terminal and tighten the setscrew to secure the cable into place. Connect the other end of the REM wire to a switched 12-volt positive source.
NOTE: The switched voltage is usually taken from the source unit’s accessory/remote lead.
7. Securely mount the amplifier to the vehicle or amp rack. Remember: Think before you drill! NOTE: Be careful not to mount the amplifier on cardboard or plastic panels.
8. Connect the source signal to the amplifier by plugging the RCA cables/high level inputs into the input jacks at the amplifier. Use only one input configuration. Using both the RCA and High Level inputs will cause undesirable operation.
NOTE: When using High Level Inputs, if audible engine noise is present, connect the Black wire to chassis ground. If noise is still present, contact your local authorized dealer or Lightning Audio customer service.
9. Connect the speakers. Strip the speaker wires 1/2” and insert into the speaker terminal and tighten the setscrew to secure into place. Be sure to maintain proper speaker polarity. DO NOT chassis ground any of the speaker leads as unstable operation may result.
NOTE: Mono amplifier speaker outputs (A & B) are wired in parallel internally.
10. Perform a final check of the completed system wiring to ensure that all connections are accurate. Check all power and ground connections for frayed wires
and loose connections. Complete the installation by installing the proper value fuse.
Operation
Adjusting Level: To adjust the level setting, turn the amplifier gain level to the lowest setting. Turn the source unit volume up until distortion is audible and then slowly down until the distortion is inaudible (approximately ¾ volume position). Next, increase the amplifier level setting until once again distortion is audible and then down slowly until the distortion is inaudible.
NOTE: Proper level setting is done by a trained professional utilizing an oscilloscope. For a more in depth setting procedure, contact Lightning Audio Technical Support.
Adjusting Crossover: Select the appropriate position for the crossover filter switch. Turn the crossover adjustment knob to the lowest setting. With the system playing at normal listening level, turn the crossover adjustment knob up slowly until the desired crossover point is achieved. Example: subwooferslow pass with an 80Hz crossover point and full-range- high pass with a 100Hz crossover point
NOTE: Some models include a subsonic filter with a variable 15-40Hz high pass filter designed to prevent frequencies below the audio range from being applied to the subwoofer from the amplifier. Set this to your personal preference while listening to the system.
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