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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
12
(
309 X 53
X 305)
7.6(3.46)
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
X 235)
5.9(2.67)
specs
Features and Specifications
Congratulations
• 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
table of contents
USER MANUAL
SPECIFICATIONS
LA-478/578/778/978/1478/1878/2078/2278
FEATURES & CONTROLS
LA-678/878 FEATURES & CONTROLS
LA-2478 FEATURES & CONTROLS
ELECTRICAL WIRING, INSTALLATION & SETUP
2 CH STEREO INPUT CONNECTIONS
4 CH STEREO INPUT CONNECTIONS
BRIDGED INPUT CONNECTIONS
BASIC STEREO SPEAKER CONNECTIONS
MONO-BRIDGED SPEAKER CONNECTIONS
MONO BLOCK INPUT & SPEAKER CONNECTIONS
TROUBLESHOOTING
1~2
3
4
5
6
7
8
9
11
12
13
14
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.
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-478/578/678/778/878/978
1478/1878/2078/2278 also feature:
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)
Legacy American Amplifier Features
1
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
12
(
309 X 53
X 305)
7.7(3.5)
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
15
(
309 X 53
X 381)
9.1(4.4)
on your purchase of a new
Legacy American Series 2 amplifier !