JBL Comprehensive Guide for GTQ 240 and GTQ 360 Amplifiers

Page 6

Cassette/CD Tuner Speaker-Level Output Connection (Use only when line-level output is not available)

Cassette/CD Tuner

CD Player

 

or Changer

Antenna Input

A. Satellite/Subwoofer

High-Pass Satellite Crossover Frequency: 100Hz

C:300F capacitor 100V, non-polarized

Subwoofer Low-Pass Crossover Frequency: 100Hz

Subwoofer (Low-Pass)

 

(–)

(+)

 

 

 

Tweeter/Midrange Satellites

 

 

 

Left

(High-Pass)

 

Right

 

 

 

(–)

(+)

L

(+)

(–)

 

 

 

 

 

C

 

C

 

Power

CD Input

Cassette/Receiver

Amplifier Speaker

AntennaPower Supply Wires

Level

Inputs

GTQ360

 

 

Power

 

 

 

 

 

 

 

Antenna

 

 

 

 

 

 

 

Relay

 

 

Black - Power Ground

 

Fuse

 

 

 

 

 

 

 

 

Blue (Blue/White)

Remote Antenna

Remote On/Off

Antenna Motor

Power Supply

Red - Main +12V

Fuse

Yellow - Back Up Power

Cassette/CD Preamp Output

Amplifier

Power

Connection

Amplifier

Speaker

Output

Connection

+

Speakers

LINE LEVEL

PREAMP

SPEAKER LEVEL INPUTS

L

SPEAKER OUTPUTS (BRIDGED: R+TO L–)

R

 

REM

POWER

 

INPUT

OUTPUTS

R

GR2

L

GR1

R

L

GR2

 

 

+ –

+

+

 

+

+

 

+

FUSE

FUSE IN/OUT

MUTE

GR1

GR2

GR1

 

 

GR2

 

 

 

 

 

 

 

 

30A

30A

 

L

 

+ –

+

 

 

 

30A

30A

 

R

R

GR1

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BATT(+)

GND

*You may change the subwoofer satellite crossover frequency by using the Inductor and Capacitor values calculated with the following formulas:

 

30,000

High-Pass (Satellite Crossover):

= New Capacitor Value in F

Ignition Switch

Blue w/White Stripe - Remote On/Off

(Not Included)

Fuse

Main +12V

Amplifier +

Speaker

Output +

Connection

Speakers

 

Desired crossover Frequency in Hz

 

620

 

Low-Pass (Subwoofer Crossover):

Desired crossover Frequency in Hz

= New Inductor Value in mH

 

 

Center Channel

B. Center Channel

 

Bridged Speaker Connection*

+

Vehicle Battery

Power Ground

Chassis Ground

Amplifier +

Speaker

Output

Connection

 

 

 

 

 

)–(

8 Ω

Minimum

(+)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8 Ω L-Pad

 

 

 

 

 

 

 

 

 

 

 

 

(Optional but Recommended)

 

GTQ360

 

 

 

 

 

 

 

 

 

 

 

 

 

LINE LEVEL

PREAMP

SPEAKER LEVEL INPUTS

L

SPEAKER OUTPUTS (BRIDGED: R+ TO L–)

 

REM

POWER

 

INPUT

OUTPUTS

R

 

GR2

L

GR1 R

L

GR2 R

 

 

+

+

+

+

+

+

FUSE

FUSE IN/OUT

MUTE

GR1

GR2

GR1

GR2

 

 

 

 

 

 

 

30A

30A

 

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

+

 

 

 

 

30A

30A

 

R

 

 

R

 

GR1

L

 

 

 

 

 

 

 

draws negligible current so a relatively small (18 or 20 gauge) wire may be used.

Using the REM-OUT feature – The REM- IN/OUT terminal of the GTQ amplifier may be used to turn on other amplifiers when the GTQ amplifier is being turned on by the Common Sense circuitry in the speaker-level input. Simply connect the

head unit speaker-level outputs to the GTQ amplifier speaker-level inputs and connect the REM-IN/OUT terminal to the remote-in terminal of other amplifiers or signal processors. The GTQ amplifier will turn on the other amps or processors whenever the Common Sense circuitry turns on the GTQ amplifier.

 

– –

BATT(+)

GND

* Center Channel Speaker Minimum 8 Ohms, Main

 

 

 

 

 

Speakers Minimum 4 Ohms When Used Simultaneously.

 

 

 

 

 

(+)

)–(

)–(

(+)

 

 

Stereo, Non-Bridged

 

 

 

 

 

Speaker Connection*

 

 

 

 

 

4Ω Minimum

4Ω Minimum

 

 

Simultaneous Stereo-Mono Connection Diagrams

6

Image 6
Contents 2 Channel Automotive Power Amplifier Owner’s Warranty Information Installation and Use About InstallationIntroduction System Design Using the GTQ360 and GTQ240 Controls and ConnectorsSpeaker Requirements Wiring WiringSignal Sources Ground WireSimultaneous Stereo-Mono Connection Diagrams Speaker-Level Input Harness Color Codes Internal AdjustmentsMute Connection Custom Chip ConstructionAdjusting the Gain Typical ApplicationsApplication Power-on light does not come on Case of DifficultySpecifications GTQ360 GTQ240Warranty Terms Who is Protected by this Warranty

GTQ240, GTQ360 specifications

The JBL GTQ360 and GTQ240 are part of JBL's esteemed lineup of car audio systems, designed to deliver unparalleled sound quality while ensuring robust performance tailored for automotive environments. Both models stand out for their blend of advanced technology, durable construction, and user-friendly features.

The JBL GTQ360 boasts a peak power handling of 360 watts, making it a powerhouse in sound output. This model is equipped with a 12-inch subwoofer that utilizes a high-strength polypropylene cone, allowing for deep bass response and clarity across a range of frequencies. The GTQ360 also features an oversize voice coil that enhances thermal dissipation, promoting longevity and consistent performance even during extended listening sessions.

On the other hand, the GTQ240 is slightly more compact, with a peak power handling of 240 watts. This model features a 10-inch subwoofer, designed for those who prefer a smaller footprint without sacrificing sound quality. Like its larger counterpart, the GTQ240 utilizes a durable polypropylene cone, providing durability alongside exceptional sound reproduction. Its efficient voice coil design also ensures that users enjoy a rich audio experience without unwanted distortion.

Both models employ JBL's signature technologies, including a low-pass crossover that allows users to fine-tune the subwoofer's output according to their preferences and the acoustic characteristics of their vehicle. This capability means that whether you’re a fan of thumping bass or more subtle low-end frequencies, these subwoofers can accommodate your taste.

Installation is straightforward, thanks to the user-centric design of both the GTQ360 and GTQ240. They come with adjustable mounting options and provisions that enable easy integration into various vehicle types. The construction of both subwoofers is robust, featuring a reinforced basket designed to mitigate vibration and resonance, thereby maintaining the purity of the sound produced.

In summary, the JBL GTQ360 and GTQ240 are compelling choices for car audio enthusiasts seeking superior sound quality. With their impressive power handling, innovative technologies, and durable construction, these subwoofers are set to enhance any vehicle's audio system, allowing users to enjoy their favorite music with a depth and clarity that only JBL can offer. Whether you want a powerful bass experience or a balanced sound profile, these models deliver a remarkable listening experience.