Instruction/ maintenance manual of the product GTQ240 JBL
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GRAND TOURING SERIES GENUINE JBL 4/3/2 Channel A utomotive Power Amplifier G TQ360, G TQ240 Owner’s Manual GTQ 360 new 7/17/98 10:44 AM Page 1.
2 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Thanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 1 . Intr oduction 1.1 Thanks for purchasing your new GT series automotive multi-channel amplifier. Your GT series amplifier will easily connect to virtually any car audio system, whether it is factory installed or purchased separately. The GTQ360 and GTQ240 include an abundance of unique features which are described in this man- ual.
4 13. Mode Switches – These switches are used to set the input mode for both pre- amp and speaker-level inputs. Set the switch to ST(ereo) for normal operation on the group using individual left and right inputs. Set this switch to R to drive both the left and right outputs with only a single input on the right jack.
5 (+) (–) (+) (–) Parallel Wiring Series Wiring 2 ohms Nominal Impedance 8 ohms Nominal Impedance 4 ohms 4 ohms 4 ohms 4 ohms 4.3 Remote-In/Out Connection • The remote power control system turns the GTQ amplifier off when not in use to prevent discharging of the vehicle’s bat- tery.
6 Cassette/CD Tuner CD Player or Changer CD Input Cassette/CD Preamp Output Antenna Input Power Antenna Power Antenna Relay Blue w/White Stripe - Remote On/Off Main +12V Power Ground Chassis Ground Ve.
7 5. Inter nal Adjustments 5.1 Speaker-Level Input Impedance Adjustments The speaker level inputs of the GTQ amplifiers come factory-set with 100k ohm input impedance.
8 To change the crossover frequency change the resistor network as follows: 1. Remove the screws from the bottom panel as shown below. 2. Select which resistor module, high pass or low pass, that you wish to change. 3. A chip puller, which can be obtained from any electronics store, is recom- mended to remove the resistor chip.
9 R LR L –+ –+ L + L – R + R – L + L – R + R – –+ – + Application 3 4-Channel Bi-Amplified System with Non-Fading Subwoofers GTQ AMP GR 1 GR 1 GR 2 GR 2 R L R L Front Speakers Subwoofe.
10 8. In Case of Difficulty Power-on light does not come on • Head unit not on; turn the head unit on. • Ground wire is disconnected or defec- tive; check for continuity with an ohm- meter between the amplifier’s ground ter- minal and a known chassis ground point.
11 Specifications GTQ360 GTQ240 Power Output 60 Watts x 4 (4 Ohms, 0.05% THD) 45 Watts x 4 (4 Ohms, 0.05% THD) (20Hz – 20kHz, 90 Watts x 4 (2 Ohms, 0.08% THD) 60 Watts x 4 (2 Ohms, 0.08% THD) 14.4V Battery Voltage) 180 Watts x 2 (Bridged 4 Ohms, 0.
JBL Consumer Products 80 Crossways Park West Woodbury, NY 11797 8500 Balboa Blvd. Northridge, CA 91329 800-336-4JBL (4525) Part No. GTQ360/240OM Made in USA A Harman International Company C E L E B R .
An important point after buying a device JBL GTQ240 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought JBL GTQ240 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data JBL GTQ240 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, JBL GTQ240 you will learn all the available features of the product, as well as information on its operation. The information that you get JBL GTQ240 will certainly help you make a decision on the purchase.
If you already are a holder of JBL GTQ240, 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 GTQ240.
However, one of the most important roles played by the user manual is to help in solving problems with JBL GTQ240. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device JBL GTQ240 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
