English dropdown-ico

JBL GTQ240 manual

1
2
3
4
5
6
7
8
9
10
11
12

Go to page of

Similar user manuals

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of JBL GTQ240, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

What is an instruction?

The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of JBL GTQ240 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of JBL GTQ240. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of JBL GTQ240 should contain:
- informations concerning technical data of JBL GTQ240
- name of the manufacturer and a year of construction of the JBL GTQ240 item
- rules of operation, control and maintenance of the JBL GTQ240 item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of JBL GTQ240 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of JBL GTQ240, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JBL service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of JBL GTQ240.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the JBL GTQ240 item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • 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[...]

  • Page 2

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

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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- [...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]