Audio Design LA-1600MD, LA-8004 User Manual

A

mplifiers

4ch

• LA-8004

mono

• LA-1600MD

RED: PROTECT

BLUE: POWER

0dB 10dB10Hz 150Hz 30Hz 150Hz6V

4CH

FULL

LPF

HPF

FULL

LPF

HPF

2CH

0.2V 0dB 10dB10Hz 150Hz 30Hz 150Hz6V 0.2V

LEVEL LEVEL

CH1/CH2CH3/CH4

MODE

X-OVER X-OVER

LOW PASS LOW PASSHIGH PASSHIGH PASS

BASS BOOST BASS BOOST

POWER INPUT

GNDREM12V

L CH1 CH3

R CH2

CH1

INOUT

CH4

CH2 CH3 CH4

FUSE

BRIDGED BRIDGED

0dB 12dB

40Hz 150Hz 15Hz 55Hz6V

MASTER
OUTPUT

SLAVE
INPUT

0.2V

INPUT LEVELMODE LOW PASS SUBSONIC BASS BOOST

RED: PROTECT

BLUE: POWER

POWER INPUT SPEAKER

FUSE

12V REM GND

OUTPUT

REMOTE

INPUTSLAVE INPUT

MASTER OUTPUT

L

R

LA-8004

LA-1600MD

Fuse(s): Value dependant on amplifier

power output

Power Connector

Terminal: power (12V), ground (GND), &

remote (REM)

Remote Bass Boost: Con-

nect the supplied control to remotely control the
bass boost.

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 (HPF),

& low-pass (LPF)

Adjustable Crossover

Frequency Control: 12db/Oct;

Speaker Connector

Terminal: positive (+) & negative (-)

Pass Thru Outputs:

Outputs the same signal that is fed to the inputs or
Slave and Master input (MD models only)

Subsonic Control: Variable

subwoofer high pass filter; 15Hz - 55Hz

30Hz - 1.2kHz

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

2CH / 4CH or Master / Slave (MD models only)

Model

Power

Rating

Crossover

Crossover

Frequency

Subsonic

Filter

Bass Boost

Inputs

Fuse(s)

Dimensions

(LxWxH)

LA-8004 LA-1600MD

MAX

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

12dB/Oct HP/FULL/LP 12dB/Oct LP

0 to +10dB @ 45Hz 0 to +12dB @ 45Hz

9.875” x 7.5” x 2.625” 9.875” x 7.5” x 2.625”

RMS

80 x 4 @ 4Ω
110 x 4 @ 2Ω
220 x 2 @ 4Ω

MAX

800 x 1 @ 4Ω
1200 x 1 @ 2Ω
1600 x 1 @ 1Ω

Variable

10Hz - 150Hz

40Hz - 150Hz

N/A Variable

15Hz - 55Hz

(Remote Included)

RCA RCA

25A(2) 40A(2)

Variable

RMS

300 x 1 @ 4Ω
500 x 1 @ 2Ω
700 x 1 @ 1Ω

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 fire
wall 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. When using a Master/Slave configuration (MD models only), select which amplifier
will be the master, then set the mode switch to Master and connect RCA cables to the input jacks. The Slave amplifier(s); set the mode switch to Slave and connect
RCA cables to the Slave in/out jacks from the Master’s Slave in/out jacks.
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. When using a Master/Slave setup do not exceed more than two amplifiers. (MD models only)

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. In a Master/Slave setup ONLY adjustments made to the master amplifier will effect the output. (MD models only)
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. In a Master/Slave setup ONLY adjustments made to the
master amplifier will effect the output. (MD models only)