Legacy Car Audio LA1880, LA480, LA580, LA2080, LA680 User Manual

HIGH SPEED

CAR AMPLIFIER

LA480 LA1080
LA580 LA1480
LA680 LA1880
LA780 LA2080

Congratulations

on your purchase of a new

Legacy Blue Diamond Series amplifier!

Legacy amps are some of the most advanced car amplification products
available. These quality audio products are designed and engineered to afford
you years of uncompromised musical service. Legacy has utilized the latest
electronic technologies in order to deliver a superb listening experience.

This innovative system has been designed utilizing a 12 V DC Negative Ground
power supply. The LEGACY Blue Diamond Series amps incorporate two to
eight MOSFETS in the different models.

This design produces enough available voltage to supply the main amplifier
sections, and still have a huge amount of reserve voltage for peak “high
demand” situations.

The Legacy line has been designed to ensure adequate headroom for even
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.

USER MANUAL

table of contents

SPECIFICATIONS

1

LA480/580/780/1480/1880/2080 FEATURES &

2

CONTROLS
LA680/1080 FEATURES & CONTROLS

3

ELECTRICAL WIRING, INSTALLATION & SETUP

4

2 CH STEREO INPUT CONNECTIONS

5

4 CH STEREO INPUT CONNECTIONS

6

BRIDGED INPUT CONNECTIONS

8

BASIC STEREO SPEAKER CONNECTIONS

9

MONO-BRIDGED SPEAKER CONNECTIONS

10

TROUBLESHOOTING

11

WARRANTY

12

Legacy Blue Diamond Amplifier Features

all amps feature:

• Polished chrome finish w/plexiglass panel

• Soft turn on/off circuit

• Variable gain control

• Remote turn on/off

• Hi/low level inputs

• Power on LED indicator

LA

Specifications

480

2CH amplifier

LA

2CH amplifier

580

• Fully adjustable electronic crossover network

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

• 2 ohm stereo stable

• Bridgeable into 4 ohms

• MOSFET PWM power supplies

• LED protection indicator

LA

680

4CH amplifier

LA

780

2CH amplifier

LA

1080

4CH amplifier

LA

1480

2CH amplifier

LA

1880

2CH amplifier

LA

2080

2CH amplifier

OUTPUT POWER

RMS @ 4 OHMS
RMS @ 2 OHMS
MAX OUTPUT
BRIDGE MODE

FREQUENCY RESPONSE

INPUT IMPEDANCE

LOW LEVEL INPUTS
HIGH LEVEL INPUTS

INPUT SENSITIVITY

LOW LEVEL INPUTS
HIGH LEVEL INPUTS

POWER SUPPLY VOLTAGE

MATCHING SPEAKER IMPEDANCE

STEREO MODE
BRIDGED MODE

MAXIMUM CURRENT DRAW

DIMENSIONS,WxHxL,inches

(mm)

NET WEIGHT, LBS (KG)

2 X 40W
2 X 60W
2 X 300W
1 X 600W

10-30 kHz

10 k-Ohms
100 Ohms

250 mV

2.5V

14.4 VDC/NEG GD (10.5-16V)

2-4 OHMS
4-8 OHMS

15 A

11.5X2X8.25

(292 X 51 X 209)

5.4 (2.45)

2 X 50W
2 X 85W
2 X 400W
1 X 800W

2-4 OHMS
4-8 OHMS

15 A

11.5X2X9.25

(292 X 51 X 241)

6 (2.72)

4 X 35W
4 X 55W
4 X 250W
2 X 500W
(2 X 250W+1X500W)

2-4 OHMS
4-8 OHMS

20 A

11.5X2X12

(292 X 51 X 305)

8.1 (3.66)

2 X 75W
2 X 125W
2 X 500W
1 X 1000W

2-4 OHMS
4-8 OHMS

20 A

11.5X2X12

(292 X 51 X 305)

7.4 (3.35)

4 X 75W
4 X 125W
4 X 500W
2 X 1000W
(2 X 500W+1X1000W)

2-4 OHMS
4-8 OHMS

40 A

11.5X2X15

(292 X 51 X 381)

9.5 (4.3)

2 X 125W
2 X 200W
2 X 800W
1 X 1600W

2-4 OHMS
4-8 OHMS

30 A

11.5X2X15

(292 X 51 X 381)

9.24 (4.2)

2 X 150W
2 X 230W
2 X 900W
1 X 1800W

2-4 OHMS
4-8 OHMS

40 A

11.5X2X17

(292 X 51 X 432)

10.3 (4.66)

2 X 200W
2 X 320W
2 X 1200W
1 X 2400W

2-4 OHMS
4-8 OHMS

50 A

11.5X2X19

(292 X 51 X 482)

11.44 (5.2)

Features and Specifications

specs

23

12V12

V

REMREM

GNDGND

FUUSEFUSE

1

–

+

BRIDGED

+–+–

LR

Speaker Terminals1

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

Fuse

2

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

Power Supply Terminals

3

Input Level Control

4

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.

Bass Boost Control

6

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

Low Pass Control

7

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

High Pass Control

8

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

High Level Input (Low Impedance)

9

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

Low Level Input (High Impedance)

10

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 IN

REMOTE

BASS BOOST

13

12

LA480/580/780/1480/1880/2080

Features and Controls

HPF

POWERPROTECT

80 2.5k

H

11

2

35 400

78

LPF

0 18db

H

2

BASS

BOOST FREQ. LEVEL

MIN MAX

HPF

LPF

FULL

5

6

L

RL

R

HI IN

9

10

4

Power LED Indicator

11

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

1212

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 todetermine 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.

Remote Bass Boost(LA480 Without)

13

Plug in the Remote Bass Boost Control wire in here.

2

3

–

FUUSEFUSE

4

GNDGND

12V12

V

REMREM

1

–

CH

2

BRIDGED

+–

1

+

+–

CH

+

BRIDGEDBRIDGED

+ –

+–

CH4CH

CH

3

1

Speaker Terminals

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

Fuse

2

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

Power Supply Terminals

3

Input Level Control

4

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.

Bass Boost Control

6

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

Low Pass Control

7

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

High Pass Control

8

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

High Level Input (Low Impedance)

9

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

Low Level Input (High Impedance)

10

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.

3

LA

4

CH

CH4CH

3

HI IN

CH

3

LOW IN

10

9

680/1080

4

5

Features and Controls

BASS

BOOST LPF

FREQ. HPF

MIN MAX

6 7 8 8 7 6

18db 80 2.5k

35 400

0

LPF

HPF

FULL

H

2

H

2

REMOTE

BASS BOOST CH

13

12

Power LED Indicator

11

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

1212

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 todetermine 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.

BASS

BOOSTLPFHPFLEVEL

FREQ. LEVEL

80 2.5k

35 400

0 18db

H

3/4

POWERPROTECT

HPF

2

H

2

11

2

CH

CH2CH

LOW IN

1

HI IN

CH

1

10

4

5

9

MIN MAX

LPF

FULL

To reset the amp, turn the REMOTE power off and on
again.

Remote Bass Boost

13

Plug in the Remote Bass Boost Control wire in here.