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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 Cen
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Legacy American Amplifier Features LA-478/578/678/778/878/978 1478/1878/2078/2278 also feature: • Soft turn on/off circuit • Fully adjustable electronic crossover network • Variable gain control • Remote control Bass boost ( 0 – +18dB @ 60Hz ) • Remote turn on/off • 2 ohm stereo stable • Hi/low level inputs • Bridgeable into 4 ohms • Power on LED indicator • MOSFET PWM power supplies • LED protection indicator Congratulations on your purchase of a new Legacy American Series 2 amplifi
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1 Speaker Terminals These terminals are 14K Gold plated for high conductivity and minimum impedance loss. The terminals face Legacy American Amplifier Features upwards for easy wiring in tight situations. 2 Fuse LA- 2478 also feature: Protects the amplifier as well as the automobile electrical system from short circuit conditions. · Mono Block Subwoofer Amplifier · Phase Control 0-180 degree Power Supply Terminals 3 · 2 Ohm Stable · Remote Bass Control Input Level Control · MOSFET Power Suppl
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1 Speaker Terminals These terminals are 14K Gold plated for high conductivity and minimum impedance loss. The terminals face 1 Speaker Terminals upwards for easy wiring in tight situations. 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. 2 Fuse Protects the amplifier as well as the automo
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LA-478 Low Level Stereo Input Connection LA-578 Making Power Connections LA-778 1. Connect the +12V terminal directly to the car battery (+) terminal. 2. Connect the GROUND terminal directly to the car battery (-) terminal LA-978 OR to a good clean, paint-free chassis ground point. LA-1478 3. To ensure a good ground, and to prevent “motor-boating” noise in the system, make an additional connection from the car battery (-) terminal to remote LA-1878 to the chassis of the stereo unit, using 12 g
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LA-678 LA-478 LA-878 LA-578 4CH AMPS LA-778 LA-978 Low Level 4 CH Stereo Input Bridged Input Connection LA-1478 from 2 CH Audio Source LA-1878 to a second amplifier LA-2078 LA-2278 Right Output 2CH AMPS head unit head unit Left Output Y adaptors Y adaptors 9 LA-678 LA-878 4CH AMPS Low Level 4 CH Stereo Input 4 CH Bridged Input from 4 CH Audio Source from 2 CH Audio Source CH1+2 = Left Channel CH3+4 = Right Channel head unit Left Output head unit L + R Front Outputs L + R Rear Outputs Right Outp
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LA-678 LA-478 LA-878 LA-578 4CH AMPS LA-778 LA-978 LA-1478 wiring harness High Level 4 CH Stereo Input LA-1878 Basic Stereo Output from 4CH Audio Source LA-2078 floating ground connection LA-2278 head unit 2CH AMPS orange orange L R L R black black black black LEFT speaker RIGHT speaker orange orange REAR FRONT 11 LA-678 LA-878 4CH AMPS High Level 4 CH Stereo Input Basic 4CH Output from 4CH Audio Source common ground connection head unit L R L R orange orange black black R L black black orange o
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LA-478 LA-2478 Low Level Stereo Input Connection MONO CHANNEL LA-578 AMPS LA-778 LA-978 LA-1478 Bridged Mono Output LA-1878 LA-2078 L/R Audio TO SATELLITE AMPLIFIER head unit Outputs LINE INPUT MINIMUM LA-2278 SPEAKER 2CH AMPS IMPEDANCE speaker 4 OHMS! 13 LA-678 LA-878 2 CH Mono-Bridged Output 4CH AMPS speakers MINIMUM Speaker Output Connection SPEAKER L IMPEDANCE R 4 OHMS! MINIMUM SPEAKER IMPEDANCE subwoofer 2~4 OHMS! 2 CH Stereo plus Mono-Bridged Subwoofer Output speakers MINIMUM SPEAKE
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Amplifier will not power up. • Check for good ground connection. • Check that remote DC terminal has at least +12v DC. • Check that there is battery power on the + terminal. STOP • Check all fuses. • Check that Protection LED is not lit. If it is lit, shut off amplifier briefly and then repower it. High hiss or engine noise (alternator whine) in 4 ohm 4 ohm speakers. 2 -c hannel Amplifier • Disconnect all RCA inputs to the amplifier(s) – if hiss/noise 2 -c hannel Amplifier (Operating in (Ope
