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Legacy Car Audio LA780 manual

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Table of contents for the manual

  • Page 1

    LA480 LA1080 LA580 LA1480 LA680 LA1880 LA780 LA2080 HIGH SPEED CAR AMPLIFIER[...]

  • Page 2

    Congratulations on your purchase of a new Legacy Blue Diamond Series amplifier! Le • P • S • V • R • H • P al table of contents USER MANUAL SPECIFICA TIONS LA480/580/780/1480/1880/2080 FEA TURES & CONTROLS LA680/1080 FEA TURES & CONTROLS ELECTRICAL WIRING, INST ALLA TION & SETUP 2 CH STEREO INPUT CONNECTIONS 4 CH STEREO INPU[...]

  • Page 3

    specs Features and Specifications Legacy Blue Diamond Amplifier Features • Polished chrome finish w/plexiglass panel • Soft turn on/off circuit • V ariable gain control • Remote turn on/off • Hi/low level inputs • Power on LED indicator • Fully adjustable electronic crossover network • Remote control Bass boos t(0– +18dB @ 60Hz ) [...]

  • Page 4

    LA480/580/780/1480/1880/2080 Features and Contr ols 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[...]

  • Page 5

    LA 680/1080 Features and Contr ols 3 d , n 3 5 h e e r c al v ity 11 10 9 8 7 6 5 4 3 2 1 12 12 t) 13 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 importa[...]

  • Page 6

    Electrical Wiring and Installation Making Power Connections 1. Connect the +12V terminal directly to the car battery (+) terminal. 2. Connect the GROUND terminal directly to the car battery (-) terminal OR to a good clean, paint-free chassis ground point. 3. T o ensure a good ground, and to prevent “motor -boating” noise in the system, make an [...]

  • Page 7

    inputs Low Level Stereo Input Connection High Level Stereo Input Connection LA480 LA580 LA780 LA1480 LA1880 LA 2080 Input Connections 2CH AMPS 5 PLEASE NOTE! If using high level inputs, do not use the low level RCA inputs at the same time! wiring harness LR LR from speaker terminals head unit orange black black orange L/R audio outputs head unit GN[...]

  • Page 8

    Input Connections LA680 LA1080 4CH AMPS Low Level 4 CH Stereo Input from 2 CH Audio Sour ce Low Level 4 CH Stereo Input from 4 CH Audio Sour ce Left Output Right Output 0 BASS BOOST LPF FULL LPF HPF CH 4 CH 3 CH 3 LOW IN CH 4 HI IN FREQ. HPF 18db 80 2.5k H 2 35 400 H 2 80 2.5k H 2 35 400 H 2 0 18db BASS BOOST LPF HPF LEVEL MIN MAX FULL LPF FREQ. LE[...]

  • Page 9

    LA680 LA1080 7 inputs Input Connections 4CH AMPS High Level 4 CH Stereo Input from 4CH Audio Sour ce High Level 4 CH Stereo Input from 4CH Audio Sour ce wiring harness LR REAR FRONT LR orange black black orange orange black black orange head unit head unit R LR L REAR FRONT orange black black orange orange black black orange 0 BASS BOOST LPF FULL L[...]

  • Page 10

    Input Connections Bridged Input Connection 4 CH Bridged Input from 2 CH Audio Sour ce CH1+2 = Left Channel CH3+4 = Right Channel head unit Y adaptors to a second amplifier Left Output Right Output LA680 LA1080 4CH AMPS 2CH AMPS LA480 LA580 LA780 LA1480 LA1880 LA2080 FULL LPF HPF HPF 35 400 H 2 LPF 0 18db BASS BOOST FREQ. LEVEL MIN MAX LOW IN R L PO[...]

  • Page 11

    speakers Speaker Connections Basic Stereo Output Basic 4CH Output 9 2CH AMPS LA680 LA1080 4CH AMPS LA480 LA580 LA780 LA1480 LA1880 LA2080 +–+– LR BRIDGED GND GND REM REM F U U SE FUSE 12 V 12 V + – LEFT speaker RIGHT speaker GND GND REM REM F U U SE FUSE 12 V 12 V CH 4 CH 4 + – CH 2 +– CH 1 +– CH 3 +– BRIDGED + – BRIDGED BRIDGED + ?[...]

  • Page 12

    Speaker Connections 2 CH Mono-Bridged Output Bridged Mono Output LA 680 LA 1080 4CH AMPS 2CH AMPS LA480 LA580 LA780 LA1480 LA1880 LA2080 +–+– LR BRIDGED GND GND REM REM F U U SE FUSE 12 V 12 V + – GND GND REM REM F U U SE FUSE 12 V 12 V CH 4 CH 4 + – CH 2 +– CH 1 +– CH 3 +– BRIDGED + – BRIDGED BRIDGED + – speakers LR MINIMUM SPEAK[...]

  • Page 13

    tr oubleshooting T roubleshooting 2 CH Stereo plus Mono-Bridged Subwoofer Output TROUBLESHOOTING 11 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. • Check all fuses. • Check that Protection LED is not lit. If it i[...]

  • Page 14

    W ARRANTY 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 discretio[...]