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JBL GTO301.1 manual

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Table of contents for the manual

  • Page 1

    car audio pow er amplifier owner’ s manual THANK Y OU for purchasing a JBL Grand T ouring ® Series amplifier . In order that we may better serve you should you require warranty service for your new amplifier , please retain your original purchase receipt and return the enclosed warranty registration card.[...]

  • Page 2

    INST ALLA TION 2 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

    APPLICA TIONS – GTO301. 1, GTO601. 1 AND GT O1201. 1 The GTO subwoofer amplifiers are single-channel amplifiers. There are two sets of terminals to make it easy to connect multiple woofers. Either set of (+/–) terminals may be used when connecting woofers. T o the right are two application diagrams to help plan your subwoofer system installatio[...]

  • Page 4

    4 APPLICA TIONS – GTO75.4 The GTO75.4 can be set up for stereo 4-channel, 3-channel or bridged 2-channel operation, as shown in Figures 6 through 8 . NOTE: For simplicity , Figures 6 through 8 do not show power , remote and input connections. NOTE: Minimum speaker impedance for stereo operation is 2 ohms. Minimum speaker impedance for bridged ope[...]

  • Page 5

    Subwoofer Rear Front – + + – + – 5 APPLICA TIONS – GTO755.6 The GTO755.6 can be configured for 6-channel, 5-channel or 3-channel operation, as shown in Figures 9 through 11 . INPUT MODE switch: • Use INT (internal mode) to send a signal from the front and rear inputs to the subwoofer . • Use EXT (external mode) when sending a dedicated [...]

  • Page 6

    6 INST ALLA TION AND SETUP SETTING THE CROSSOVER(S) Determine your system plans and set the crossover mode switch accordingly . If you plan to use the GTO75.2 or GTO75.4 to drive full-range speakers, set the crossover mode to FLA T and skip to “Setting Input Sensitivity . ” Initially set the crossover frequency control midway . While listening [...]

  • Page 7

    7 INST ALLA TION AND SETUP T o Neon Power Supply T o Neon Power Supply Figure 13. Installing neon tubes in a JBL GTO amplifier . TROUBLESHOOTING SYMPTOM LIKEL Y CA USE SOLUTION No audio No voltage at BA TT+ Check voltages at (POWER LED or REM terminals, amplifier terminals is off) or bad or no ground with VOM connection No audio DC voltage on Ampli[...]

  • Page 8

    GTO301.1 • 204W RMS x 1 channel at 4 ohms and ≤ 1% THD + N • Signal-to-noise ratio: 77dBA (reference 1W into 4 ohms) • 294W RMS x 1 channel at 2 ohms, 14.4V supply and ≤ 1% THD + N • Dynamic power: 320W at 2 ohms • Effective damping factor: 6.39 at 4 ohms • Frequency response: 10Hz – 302Hz (–3dB) • Maximum input signal: 4.7V ?[...]