Audio Design LA-5100, LA-2100, LA-4200, LA-4100 User Manual

A

mplifiers

2ch

• LA-2100

4ch

• LA-4100

• LA-4200

5ch

• LA-51000

HIGH LEVEL INPUT

CH3

CH3

CH4

CH4

CH2

CH2

CH1

4CH 2CH

CH1

LINE

OUTPUT

X-OVER

X-OVER

INPUT MODE

LEVEL BASS BOOST HIGH PASS LOW PASS

CH1/CH2 CH3/CH4

LINE INPUT

HPLPFULL

HPLPFULL

4V 0dB 12dB 60Hz 1.2kHz 30Hz 250Hz0.2V

4V 0dB 12dB 60Hz 1.2kHz 30Hz 250Hz0.2V

R

L

FUSE

GND REM

POWER

PROTECT

+12V

POWER INPUT

CH1

SPEAKER OUTPUT

BRIDGED

BRIDGED

CH2CH3CH4

CH2CH4

OFF ON

LP/BP FULL

BPF

BPF

HP

X-OVER INPUT MODE

TWIN SUB

LP/BP FULL

HP

X-OVER

BASS REMOTE

LOW

PASS

HIGH
PASS

BASS

BOOST

CH1/CH2 CH3/CH4

CH3

CH4 CH2

CH1

LINE INPUTLINE OUTPUT

PROTECTPOWER

0dB 12dB 10Hz 1.2kHz

30Hz 150Hz

LEVEL

4V 0.2V

0dB 12dB 10Hz 1.2kHz

30Hz 150Hz

4V 0.2V

R

L

FUSE

GND REM +12V

POWER INPUT

CH1

SPEAKER OUTPUT

BRIDGED

BRIDGED

CH2 CH3 CH4

FULL HPF FULL HPF

CH1

CH2

CH 3/4 CH 1/2

CH3

CH4

CH4 CH5

CH5

CH5

LINE INPUT

PROTECT

POWER

LEVEL

LEVEL

LEVEL

MODE

X-OVERX-OVER

HPF

CH 5 CH 5

HPF

REMOTE

LPFBASS EQSUBSONIC

0dB 12dB

10Hz

15Hz 55Hz 30Hz 150Hz

150Hz 10Hz 150Hz5V5V0.2V 5V 0.2V

0.2V

FUSE

GNDREM+12V

POWER INPUT

CH1

SPEAKER OUTPUT

BRIDGED

BRIDGED

CH2 CH3 CH4 CH5

LA-2100

HIGH LEVEL

LA-4100

LA-4200

X-OVER

LEVEL

L

R

L

INPUT

R

LINE

OUTPUT

INPUT

LP

HP

FULL

4V 0.2V 60Hz 1.2kHz 40Hz150Hz 0dB 12dB

LINE

INPUT

BASS

LOW

HIGH

BOOST

PASS

PASS

PROTECTPOWER

GND REM +12V

POWER INPUT

FUSE

R

SPEAKER OUTPUT

BRIDGED

L

LA-51000

Fuse(s): Value dependant on amplifier

power output

Power Connector

Terminal: power (B+), ground (GND), &

remote (REM)

High Level Inputs: Use if the

source unit has only speaker line outputs.

RCA Inputs: Line level from radio

pre-outs.

Level Control: Adjust to match

the output levels of the source unit.

Crossover Filter

Switch: full range (FULL), high-pass (HP), &

low-pass (LP)

Adjustable Crossover

Frequency Control: 12db/Oct;

30Hz - 1.2kHz

Bass Boost: 0dB - 12dB Input Mode Switch: Select

Speaker Connector

Terminal: positive (+) & negative (-)

Pass Thru Outputs: Out-

puts the same signal that is fed to the inputs.

Subsonic Control: Variable

subwoofer high pass filter; 15Hz - 55Hz

2CH, 3CH, 4CH or 5CH

Model

Power
Rating

LA-2100 LA-4100 LA-4200 LA-51000

MAX

100 x 2 @ 4Ω
200 x 2 @ 2Ω
400 x 1 @ 4Ω

RMS

50 x 2 @ 4Ω
90 x 2 @ 2Ω

180 x 1 @ 4Ω

MAX

100 x 4 @ 4Ω
200 x 4 @ 2Ω
400 x 2 @ 4Ω

RMS

50 x 4 @ 4Ω
75 x 4 @ 2Ω

150 x 2 @ 4Ω

MAX

200 x 4 @ 4Ω
400 x 4 @ 2Ω
800 x 2 @ 4Ω

RMS

100 x 4 @ 4Ω
150 x 4 @ 2Ω
300 x 2 @ 4Ω

MAX

125 x 4 @ 4Ω / 400 x 1 @ 2Ω
200 x 4 @ 2Ω / 500 x 1 @ 1Ω

RMS

62.5 x 4 @ 4Ω / 200 x 1 @ 2Ω
100 x 4 @ 2Ω / 250 x 1 @ 1Ω

Crossover

Crossover

Frequency

Subsonic

Filter

Bass Boost

Inputs

Fuse(s)

Dimensions

(LxWxH)

12dB/Oct HP/AP/LP 12dB/Oct HP/AP/LP/BP 12dB/Oct HP/AP/LP/BP 12dB/Oct HP/AP/LP

Variable

30Hz - 1.2kHz

N/A N/A N/A

0 to +12dB @ 45Hz 0 to +12dB @ 45Hz 0 to +12dB @ 45Hz

Variable

30Hz - 1.2kHz

Variable

30Hz - 1.2kHz

(Remote Included)

Variable

30Hz - 1.2kHz

Variable

15Hz - 55Hz

0 to +12dB @ 45Hz

(Remote Included)

RCA / High Level RCA / High Level RCA RCA

15A(2) 20A(2) 80A(1) 80A(1)

9.5” x 9.4” x 2.3” 11.8” x 9.4” x 2.3” 16.5” x 9.4” x 2.3” 20.3” x 9.4” x 2.3”

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: subwoofers- low 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.