JBL GTS100 Owner's Manual - Introduction

Introduction

Thanks for purchasing your new 

GT series automotive amplifier. The 

GT series amplifier you have chosen

includes many unique features to

enhance its performance and utility.

The power amplifier circuitry is a 

fully discrete design notable for low 

distortion and unusually clean and clear

reproduction quality. Your GT series

amplifier will easily connect to virtually

any car audio system, whether it is 

factory installed or purchased 

separately. 

In addition to conventional preamp-level

inputs, this model features JBL’s

Universal Interface design, which facili-

tates simple connection to factory

radios with the low distortion that is usu-

ally only associated with preamp level

connection. With Universal Interface, a

factory radio can be used either as the

main music source or combined with a

CD changer which includes volume

control capability, simultaneously 

connected directly to the amplifier.

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By providing this two-unit direct connec-

tion, Universal Interface circuitry elimi-

nates the need for an FM modulator to

connect a CD player to factory radios,

improving the fidelity of digital playback. 

Also, when using a high-powered (BTL)

radio through the speaker-level inputs,

Common Sense turn-on circuitry 

senses the common-mode voltage 

present on the radio’s speaker wires

and turns the amplifier on without an

additional “remote” wire. When the

speaker-level inputs are used exclu-

sively, the preamp-level inputs may be

converted to preamp-level outputs to

drive additional amplifiers or signal

processors.

In addition, the built-in active crossover

provides either high-pass or low-pass

operation. This lets your GT series

amplifier power either subwoofer or

main speakers in a bi-amplified system,

without the expense of an additional

crossover.

JBL 1394 Manual  7/17/98 11:49 AM  Page 3