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JBL A3000GTi manual

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Table of contents for the manual

  • Page 1

    car audio pow er amplifier o wner’ s manual THANK Y OU for purchasing a JBL A6000GT i or A3000GT i amplifier . For warranty support, please register your purchase at www .jbl.com. Select Car Audio, then click on Support, and then click on Product Registration. Also, please retain your original purchase receipt and packing crate in case you must s[...]

  • Page 2

    INST ALLA TION W ARNING: Playing loud music in an automobile can hinder your ability to hear traffic and permanently damage your hearing. We recommend listening at low or moderate levels while driving your car . JBL accepts no liability for hearing loss, bodily injury or property damage resulting from the use or misuse of this product. IMPORT ANT :[...]

  • Page 3

    DESIGNING A SPEAKER SY STEM FOR THE GTi AMPLIFIER NOTE: Although the JBL A6000GT i or A3000GT i amplifier will drive a system made up of any subwoofers, we recommend using JBL GT i subwoofers with GT i amplifiers. Both the JBL A6000GT i and A3000GT i amplifiers provide RMS power that exceeds the RMS power -handling rating of nearly every subwoofer [...]

  • Page 4

    4 SUPPL YING POWER TO THE GTi AMPLIFIER POWER IN IS POWER OUT In order to get full power out of your amplifier , you must provide full power to your amplifier . That’ s a basic rule of physics. The A6000GT i amplifier can draw nearly 800 amperes when reproducing sine waves at full output. Both JBL A6000GT i and A3000GT i amplifiers can quickly ex[...]

  • Page 5

    5 MAKING THE CONNECTIONS POWER CONNECTIONS Use 0-gauge cable to connect the amplifier’ s GND – terminal directly to the vehicle’ s chassis (see Figure 5). Scrape off all paint from the metal area for a good, clean ground connection. Make sure the ground wire is as short as possible and is connected to metal on the vehicle’ s body. Do not co[...]

  • Page 6

    6 MAKING THE CONNECTIONS A6000GTi SPEAKER CONNECTIONS The A6000GT i is a 2-channel amplifier designed to drive subwoofers only . The left and right input signals are combined inside the amplifier to provide a mono output signal, no matter which output mode is selected. The A6000GT i can be connected to two independent speaker systems in 2-channel m[...]

  • Page 7

    7 MAKING THE CONNECTIONS A3000GTi SPEAKER CONNECTIONS Included below are three application diagrams that will help you plan your A3000GT i installation. Figures 10 through 12 show how to configure the JBL A3000GT i amplifier for bridged-mono, parallel-mono and 2-channel operation (also see Setting Up the GT i Amplifier). NOTE: For simplicity , Figu[...]

  • Page 8

    8 SETTING UP THE GTi AMPLIFIER SETTING THE CROSSO VER IMPORT ANT : If you plan to use the A3000GT i to drive full-range speakers, set the crossover mode switch to FLA T and skip to the next section, “Setting Input Sensitivity . ” 1. Depending on your system plan, set the A3000GT i’ s crossover mode switch to LP (low-pass) or HP (high- pass). [...]

  • Page 9

    9 SETTING UP THE GTi AMPLIFIER REPLACING THE FUSE OR NEON TUBES The JBL A6000/A3000GT i amplifier is equipped with an internal fuse, a 20-inch neon tube and two 6-inch neon tubes. Should the fuse or a neon tube fail, perform the following steps to replace the part: NOTE: For neon tube replacement, see your authorized JBL car audio dealer to purchas[...]

  • Page 10

    10 SETTING UP THE GTi AMPLIFIER 7. Using a T -15 screwdriver , remove the two T orx-head screws on the display board and set them aside (see Figure 16 below). Disconnect the ribbon cable from display board. 8. Using a T -15 screwdriver , remove the 16 T orx-head screws on the perforated shield and set them aside (see Figure 16). Figure 16. Removing[...]

  • Page 11

    11 TROUBLESHOOTING SYMPTOM LIKEL Y CAUSE SOLUTION No audio No voltage at power Check BA TT+, REMOTE and (Power LED is off) or remote terminal GND – terminals with VOM for blown fuse or poor connection Internal fuse blown Replace internal fuse (incorrect power (see Replacing the Fuse connections) or Neon T ubes section) No audio Low or high voltag[...]

  • Page 12

    JBL Consumer Products 250 Crossways Park Drive, Woodbury , NY 11797 USA © 2004 Harman International Industries, Incorporated JBL and Crown are registered trademarks of Harman International Industries, Incorporated. Part No. GTIAMPOM4/04 Features, specifications and appearance are subject to change without notice. www.jbl.com[...]