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Legacy Car Audio
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LA-878
User Manual
9 pgs1.1 Mb0

Legacy Car Audio LA-878, LA-778, LA-1478, LA-978, LA-2078 User Manual

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MANUFACTURER’S LIMITED TWO YEAR
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
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:
WARRANTY
the date of original purchase.
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
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.
necessary.
LEGACY SERVICE CENTER
1600 63rd Street
Brooklyn, NY 11204
LA-478 LA-578 LA-678
LA-778 LA-878 LA-978
LA-1478
LA-1878 LA-2078 LA-2278 LA-2478
WWW.legacycaraudio.com
Congratulations
on your purchase of a new
Legacy American Series 2 amplifier !
Legacy American Amplifier Features
LA-478/578/678/778/878/978 1478/1878/2078/2278 also feature:
• Soft turn on/off circuit
• Variable gain control
• Remote turn on/off
• Hi/low level inputs
• Power on LED indicator
• LED protection indicator
• Fully adjustable electronic crossover network
• Remote control Bass boost ( 0 – +18dB @ 60Hz )
• 2 ohm stereo stable
• Bridgeable into 4 ohms
• MOSFET PWM power supplies
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 American Series 2 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
1~2
LA-478/578/778/978/1478/1878/2078/2278
3
FEATURES & CONTROLS LA-678/878 FEATURES & CONTROLS
4
LA-2478 FEATURES & CONTROLS
5
ELECTRICAL WIRING, INSTALLATION & SETUP
6
2 CH STEREO INPUT CONNECTIONS
7
4 CH STEREO INPUT CONNECTIONS
8
BRIDGED INPUT CONNECTIONS
9
BASIC STEREO SPEAKER CONNECTIONS
11
MONO-BRIDGED SPEAKER CONNECTIONS
12
MONO BLOCK INPUT & SPEAKER CONNECTIONS
13
TROUBLESHOOTING
14
Specifications
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, W x H x L, inches
(mm)
NET WEIGHT, LBS (KG)
LA-478
2CH amplifier
2 X 40W 2 X 60W 2 X 300W 1 X 600W
10Hz-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
12.2 X 2 X 8.25
(309 X 53 X 209)
5.2(2.37)
LA-578
2CH amplifier
2 X 50W 2 X 75W 2 X 400W 1 X 800W
2-4 OHMS 4-8 OHMS
15 A
12.2 X 2 X 9.25
(
309 X 53
5.9(2.67)
X 235)
LA-678
4CH amplifier
4 X 35W 4 X 55W 4 X 250W 2 X 250W+500W
OR 2 X 500W
2-4 OHMS 4-8 OHMS
20 A
12.2 X 2 X
(
309 X 53
7.7(3.5)
12
X 305)
LA-778
2CH amplifier
2 X 75W 2 X 125W 2 X 500W 1 X 1000W
2-4 OHMS 4-8 OHMS
20 A
12.2 X 2 X
(
309 X 53
7.6(3.46)
12
X 305)
LA-878
4CH amplifier
4 X 50W 4 X 60W 4 X
400W
2 X 400W+800W
OR
2 X 800W
2-4 OHMS 4-8 OHMS
40 A
12.2 X 2 X
(
309 X 53
9.1(4.4)
15
X 381)
1
Features and Specifications
specs
Legacy American Amplifier Features
LA-2478 also feature:
· Mono Block Subwoofer Amplifier
· 2 Ohm Stable
· MOSFET Power Supply
· Gold Plated RCA Inputs for Line Input & Bypass Output.
· Gold Plated Terminals for Speaker Output and Power Input.
· Thermal, Overload and Short Protection
· Variable Sub-sonic Filter (15Hz~40Hz, 24dB/Octave)
· Variable Low-pass Filter (20Hz~250Hz, 24dB/Octave)
Specifications
OUTPUT POWER
RMS @ 4 OHMS RMS @ 2 OHMS MAX OUTPUT  BRIDGE MODE
FREQUENCY RESPONSE INPUT IMPEDANCE
LOW LEVEL INPUTS HIGH LEVEL INPUTS
LA-978
2CH amplifier
2 X 100W 2 X 150W 2 X 600W 1 X 1200W
10Hz-30 kHz
10 k-Ohms 100 Ohms
LA-1478
2CH amplifier
2 X 125W 2 X 200W 2 X 800W 1 X 1600W
LA-1878
2CH amplifier
2 X 150W 2 X 225W 2 X 1000W 1 X 2000W
· Phase Control 0-180 degree
· Remote Bass Control
· Input Impedance : 10K Ohms
· Soft Turn On/Off
· Advanced Protection Circuitry
· S/N Ratio:>90dB
LA-2078
2CH amplifier
2 X 200W 2 X 300W 2 X 1200W 1 X 2400W
LA-2278
2CH amplifier
2 X 300W 2 X 450 2 X 200
W 0W
1 X 4000W
LA-2478
Mono channel amplifier
200W mono 335W mono 2000W mono
20-250Hz( 3dB)
10 k-Ohms 100 Ohms
Speaker Terminals1
These terminals are 14K Gold plated 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 output from 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.
Power LED Indicator
11
This LED is illuminated when the REMOTE ON system is turned on.
3
INPUT SENSITIVITY
LOW LEVEL INPUTS HIGH LEVEL INPUTS
POWER SUPPLY VOLTAGE MATCHING SPEAKER IMPEDANCE
STEREO MODE BRIDGED MODE
MAXIMUM CURRENT DRAW DIMENSIONS, W x H x L, inches
(mm)
NET WEIGHT, LBS (KG)
specs
Features and Specifications
250 mV
2.5V
14.4 VDC/NEG GD (10.5-16V)
2-4 OHMS 4-8 OHMS
30 A
12.2 X 2 X
(
309 X 53
13.5
X 343)
8.2(3.73)
2-4 OHMS 4-8 OHMS
30 A
12.2 X 2 X
(
309 X 53
15
X 381)
8.8 (4.0)
2-4 OHMS 4-8 OHMS
40 A
12.2 X 2 X
(
309 X 53
17
X 432)
10.1 (4.62)
2-4 OHMS 4-8 OHMS
50 A
12.2 X 2 X
(
309 X 53
19
X 482)
11.4 (5.2)
2-4 OHMS 4-8 OHMS
70 A
12.2 X 2 X
(
309 X 53
21
X 532)
12.8 (5.8)
250 mV 4V
14.4 VDC/NEG GD (10.5-16V)
2 OHM STABLE
40 A
12.2 X 2 X
(
309 X 53
12
X 305)
7.3 (3.34)
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
Plug in the Remote Bass Boost Control wire in here.
LA-478/578/778/978/1478/1878/2078/2278
Features and Controls
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