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.
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.
