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Manual JBL GTQ240

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  • JBL GTQ240 - page 1

    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 ...

  • JBL GTQ240 - page 2

    2 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Thanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 About Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • JBL GTQ240 - page 3

    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. The flexi ...

  • JBL GTQ240 - page 4

    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. Set the switch to L + R to su ...

  • JBL GTQ240 - page 5

    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. Because the JBL GTQ amplifiers include Common Sense 2-wa ...

  • JBL GTQ240 - page 6

    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 Vehicle Battery – + Ignition Switch Antenna Motor Power Supply Blue (Blue/White) Remote On/Off Remote Antenna Black - Power Ground Red - Main +12V Yel ...

  • JBL GTQ240 - page 7

    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. This will pro- vide the lowest distortion operation from the speaker outputs of most modern head units by reducing the power the amplifier in the head unit must deliver to practi- ...

  • JBL GTQ240 - page 8

    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. Pull the resistor ch ...

  • JBL GTQ240 - page 9

    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 Subwoofers Group 1 Group 2 Mode Stereo Stereo Group 2 Input – GR 1+2 Speaker Crossover High Pass Low Pass Preamp Crossover – – RR Application 4 2-Channe ...

  • JBL GTQ240 - page 10

    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. • Battery wire is disconnected or defec- tive; check for approximately + 12 ...

  • JBL GTQ240 - page 11

    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, 0.08% THD) 120 Watts x 2 (Bridged 4 Ohms, 0.08% THD) Signal-to-Noise Ratio 100dBA 100dBA Frequency Re ...

  • JBL GTQ240 - page 12

    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 A T I N G 5 0 Y E A R S Declaration of Conformity We, JBL Europe A/S Kongevejen 194B DK-3460 Birkerød DENMARK declare in own responsibility , that th ...

Manufacturer JBL Category Stereo Amplifier

Documents that we receive from a manufacturer of a JBL GTQ240 can be divided into several groups. They are, among others:
- JBL technical drawings
- GTQ240 manuals
- JBL product data sheets
- information booklets
- or energy labels JBL GTQ240
All of them are important, but the most important information from the point of view of use of the device are in the user manual JBL GTQ240.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals JBL GTQ240, service manual, brief instructions and user manuals JBL GTQ240. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product JBL GTQ240.

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A complete manual for the device JBL GTQ240, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use JBL GTQ240 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of JBL GTQ240.

A complete JBL manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual JBL GTQ240 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the JBL GTQ240, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the JBL GTQ240, that we can find in the current document
3. Tips how to use the basic functions of the device JBL GTQ240 - which should help us in our first steps of using JBL GTQ240
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with JBL GTQ240
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of JBL GTQ240 in a specific country, if it was not possible to solve the problem on our own.

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