Legacy Car Audio LA738, LA638, LA538, LA938, LA2038 User Manual

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MANUFACTURER’S LIMITED TWO YEAR WARRANTY

LEGACY SOUND CORP. warrants this unit to be free from defective material or workmanship and will repair or replace this unit or any part thereof if it proves defective in normal use or service within two (2) years from the date of original purchase.

Our obligation under this warranty is limited to repairing or replacing, at our discretion, the defective instrument or any part thereof when it is returned, transportation prepaid to the Legacy Service Center at the address below. This warranty will be considered void if the unit has been tampered with, improperly serviced, subjected to abuse or misuse or if installed in a commercial vehicle. This warranty does not cover accidental damage. When returning this unit for service, please include $15.00 for return postage and handling. Send your unit to:

IMPORTANT: Pack carefully in original carton if possible. We are not responsible for damage incurred in returning items for repair. A letter stating your exact street address, daytime phone number, and the problem you are experiencing should be included. You must also enclose a copy of the original receipt as proof of date of purchase.

FOR YOUR PROTECTION Completely and immediately mail the Product Registration Card

so that we may contact you directly in the event a safety notification is issued in accordance with the 1972 Consumer Product Safety Act, or for other reasons Legacy may deem necessary.

TECHNICAL SUPPORT HOTLINE Our technical department will gladly answer any questions you may have about our products. They cannot, however tell you the status of a repair, or handle other customer service situations.

1-800-934-2277

Monday through Thursday, 9AM to 5PM Friday 9AM to 2PM Eastern.

LEGACY SERVICE CENTER

1600 63rd Street

Brooklyn, NY 11204

WWW.legacycaraudio.com

LA438

LA538

LA638

LA738

LA838

LA938

LA1038

LA1438

LA1838

LA2038

HIGH SPEED

CAR AMPLIFIER

Congratulations

on your purchase of a new

American Legacy

amplifier !

Legacy amps are some of the most advanced car amplification products

 

 

available. These quality audio products are designed and engineered to afford

 

USER MANUAL

you years of uncompromised musical service. Legacy has utilized

the latest

 

electronic technologies in order to deliver a superb listening experience.

 

table of contents

1

SPECIFICATIONS

 

 

 

 

This innovative system has been designed utilizing a 12 V DC Negative Ground

2

LA438/538/738/938/1438/1838/2038

 

FEATURES & CONTROLS

power supply. The LEGACY

Series

amps incorporate two to eight MOSFETS

 

3

LA638/838/1038 FEATURES & CONTROLS

in the different models.

 

 

 

 

 

 

4

ELECTRICAL WIRING, INSTALLATION & SETUP

 

 

 

 

 

 

 

 

5

2 CH STEREO INPUT CONNECTIONS

This design produces enough available voltage to supply the main amplifier

6

4 CH STEREO INPUT CONNECTIONS

sections, and still have a huge amount of reserve voltage for peak “high

7

BRIDGED INPUT CONNECTIONS

demand” situations.

 

 

 

9

BASIC STEREO SPEAKER CONNECTIONS

 

 

 

 

10

MONO-BRIDGED SPEAKER CONNECTIONS

The Legacy line has been

designed

to ensure adequate headroom for even

11

TROUBLESHOOTING

13

WARRANTY

 

 

 

 

the most demanding peaks and dynamic ranges found on today’s CD’s and recordings. Used properly, these amplifiers will provide you with years of listening pleasure.

American Legacy Amplifier Features

all amps feature:

 

 

 

 

 

 

 

 

 

LA438/538/638/738/838/938/1038/1438/1838/2038 also feature:

• LED Light Bar with Hold or Scan

 

 

 

• Fully adjustable electronic crossover network

 

 

• Soft turn on/off circuit

 

 

 

• Remote control Bass boost ( 0 – +18dB @ 60Hz )

 

• Variable gain control

 

 

 

 

 

 

 

 

 

• 2 ohm stereo stable

 

 

 

 

• Remote turn on/off

 

 

 

 

 

 

 

 

 

• Bridgeable into 4 ohms

 

 

 

 

• Hi/low level inputs

 

 

 

 

 

 

 

 

 

• MOSFET PWM power supplies

 

 

 

• Power on LED indicator

 

 

 

• LED protection indicator

 

 

 

 

Specifications

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2CH amplifier

2CH amplifier

4CH amplifier

2CH amplifier

4CH amplifier

2CH amplifier

4CH amplifier

2CH amplifier

2CH amplifier

2CH amplifier

 

 

LA438

LA538

LA638

LA738

LA838

LA938

LA1038

LA1438

LA1838

LA2038

OUTPUT POWER

@ 4 OHMS

2 X 40W

2 X 50W

4 X 35W

2 X 75W

4 X 50W

2 X 90W

4 X 75W

2 X 125W

2 X 150W

2 X 200W

RMS

RMS

@ 2 OHMS

2 X 60W

2 X 75W

4 X 55W

2 X 125W

4 X 75W

2 X 150W

4 X 115W

2 X 200W

2 X 225W

2 X 300W

MAX OUTPUT

2 X 300W

2 X 400W

4 X 250W

2 X 500W

4 X 400W

2 X 600W

4 X 500W

2 X 800W

2 X 1000W

2 X 1200W

BRIDGE MODE

1 X 600W

1 X 800W

2 X 250W+500W

1 X 1000W

2 X 400W+800W

1 X 1200W

2 X 500W+1000W

1 X 1600W

1 X 2000W

1 X 2400W

FREQUENCY RESPONSE

10Hz-30 kHz

 

 

 

OR 2 X 500W

 

OR 2 X 800W

 

OR 2 X 1000W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INPUT IMPEDANCE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOW LEVEL INPUTS

10 k-Ohms

 

 

 

 

 

 

 

 

 

 

 

HIGH LEVEL INPUTS

100 Ohms

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

INPUT SENSITIVITY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOW LEVEL INPUTS

250 mV

 

 

 

 

 

 

 

 

 

 

 

 

 

HIGH LEVEL INPUTS

2.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER SUPPLY VOLTAGE

14.4 VDC/NEG

GD (10.5-16V)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MATCHING SPEAKER IMPEDANCE

2-4 OHMS

2-4 OHMS

2-4 OHMS

2-4 OHMS

2-4 OHMS

2-4 OHMS

2-4 OHMS

2-4 OHMS

2-4 OHMS

2-4 OHMS

STEREO MODE

BRIDGED MODE

4-8 OHMS

4-8 OHMS

4-8 OHMS

4-8 OHMS

4-8 OHMS

4-8 OHMS

4-8 OHMS

4-8 OHMS

4-8 OHMS

4-8 OHMS

MAXIMUM CURRENT DRAW

15 A

15 A

20 A

20 A

30 A

30 A

40 A

30 A

40 A

50 A

DIMENSIONS, W x H x L, inches

11 X 2.7 X 8.2511 X 2.7 X 9.25

11 X 2.7 X 12

11 X 2.7 X 12

11 X 2.7 X 15

11 X 2.7 X 13.5

11 X 2.7 X 17

11 X 2.7 X 15

11 X 2.7 X 17

11 X 2.7 X 19

(mm)

 

(279 X 69 X 209)(279 X 69 X 235)

(279 X 69 X 305)

(279 X 69 X 305)

(279 X 69 X 381)

(279 X 69 X 343)

(279 X 69 X 432)

(279 X 69 X 381)

(279 X 69 X 432)

(279 X 69 X 482)

NET WEIGHT, LBS (KG)

5.7 (2.5)

 

 

 

 

6.2 (2.8)

 

8.1 (3.7)

7.5 (3.4)

9.5 (4.3)

8.4 (3.8)

10.6 (4.8)

9.2 (4.2)

10.6 (4.8)

11.4 (5.2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Features andspecsSpecifications

Legacy Car Audio LA738, LA638, LA538, LA938, LA2038 User Manual

1

2

3

14

13 12 1 8 7 6 5 4 10 9

LA438/538/738/938/1438/1838/2038

Features and Controls

1 Speaker Terminals

These terminals are 14K Gold plated for high conductivity and minimum impedance loss. The terminals face upwards for easy wiring in tight situations.

2 Fuse

Protects the amplifier as well as the automobile electrical system from short circuit conditions.

3Power Supply Terminals

4Input 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.

5 Crossover Mode Switch

In a full range system, set this to FULL. If the amp is being used to power a crossover system, set to either HPF or LPF as needed.

6 Bass Boost Control

Allows you to increase the bass signal level sent to the speakers

7 Low Pass Control

Permits you to adjust the crossover frequency from 35 Hz to 400 Hz to suit the subwoofers

8 High Pass Control

Permits you to adjust the crossover frequency from 80 Hz to 2.5 kHz to suit the tweeters

9 High Level Input (Low Impedance)

Use these if your car stereo does not have RCA output jacks: connect the speaker output from the head unit to these inputs

10 Low Level Input (High Impedance)

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.

1 Power LED Indicator

This LED is illuminated when the REMOTE ON system is turned on.

12 Protection LED Indicator

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 again.

13 Remote Bass Boost (LA438 WITHOUT)

Plug in the Remote Bass Boost Control wire in here.

14 LED Light Bar Switch.

When switch set at"SCAN"position,the LEDs scan automatically from left to right over top cover. When switch set at"Hold" position light up all the LED indicator.

1

2

3

14

4

13

4

9 10 5 6 7 8 12 1 8 7 6 5 10 9

LA638/838/1038

Features and Controls

1 Speaker Terminals

These terminals are 14K Gold plated for high conductivity and minimum impedance loss. The terminals face upwards for easy wiring in tight situations.

2 Fuse

Protects the amplifier as well as the automobile electrical system from short circuit conditions.

3 Power Supply Terminals

4 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.

5 Crossover Mode Switch

In a full range system, set this to FULL. If the amp is being used to power a crossover system, set to either HPF or LPF as needed.

6 Bass Boost Control

Allows you to increase the bass signal level sent to the speakers

7 Low Pass Control

Permits you to adjust the crossover frequency from 35 Hz to 400 Hz to suit the subwoofers

8 High Pass Control

 

Permits you to adjust the crossover frequency from

3

 

80 Hz to 2.5 kHz to suit the tweeters

9 High Level Input (Low Impedance)

 

 

Use these if your car stereo does not have

 

 

RCA output jacks: connect the speaker output from

 

 

the head unit to these inputs

 

10 Low Level Input (High Impedance)

 

 

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.

 

1

Power LED Indicator

 

 

This LED is illuminated when the REMOTE ON

 

 

system is turned on.

 

12

Protection LED Indicator

 

 

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

 

 

again.

 

13

Remote Bass Boost (LA638 WITHOUT)

 

 

Plug in the Remote Bass Boost Control wire in here.

 

14 LED Light Bar Switch.

When switch set at"SCAN"position,the LEDs scan automatically from left to right over top cover. When switch set at"Hold" position light up all the LED indicator.

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