Instruction/ maintenance manual of the product gto75.4 II JBL
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car audio pow er amplif ier owner’ s manual THANK Y OU for purchasing a JBL Grand T ouring ® Series II 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.
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.
APPLICA TIONS – GTO301. 1 II , GTO601. 1 II AND GT O1201. 1 II 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.
4 APPLICA TIONS – GTO75.4 II The GTO75.4 II 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.
Subwoofer Right Left – + + – + – GTO755.6 II (partial end panel) 5 APPLICA TIONS – GTO755.6 II The GTO755.6 II 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 .
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 II or GTO75.4 II to drive full-range speakers, set the crossover mode to FLA T and skip to “Setting Input Sensitivity .
7 INST ALLA TION AND SETUP To Neon P ower Supply To Neon Power Supply Figure 13. Installing neon tubes in a JBL GTO amplifier . TROUBLESHOO TING SYMPT OM LIKEL Y CAUSE SOLUTION No audio No.
GTO301.1 II • 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.
An important point after buying a device JBL gto75.4 II (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
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If you already are a holder of JBL gto75.4 II, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime JBL gto75.4 II.
However, one of the most important roles played by the user manual is to help in solving problems with JBL gto75.4 II. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device JBL gto75.4 II along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
