Jbl GT650P, GT800P User Manual

GRAND TOURING SERIES

GENUINE JBL

Automotive Powered

Subwoofer Systems

GT650P & GT800P Owner’s Manual

Thank You for selecting a

JBL GT Series Powered

Subwoofer System. JBL’s history

of high performance and innova-

tion goes back 50 years, yet the

only things old-fashioned about

the GT Series products are the

craftsmanship and attention to

detail that go into each one. The

model you have chosen delivers

exceptional performance in a

compact package. With proper

installation and use, it will pro-

vide many years of listening

pleasure.

GT Powered Subwoofer

Features

Your Powered Subwoofer fea-

tures a built-in amplifier and

electronic crossover capable of

supplying 80 watts of power to

the specially designed Dual

Voice Coil 2-ohm woofer. The

built-in crossover features an

adjustable low-pass filter and

level, facilitating simple match-

ing to virtually all main speaker

systems. In addition, this unit

will accept signals from either

preamp level, or speaker level

inputs, allowing connection to

virtually all source units whether

supplied by the car manufac-

turer or purchased separately. A

built-in music sensing circuit will

turn the unit on in the presence

of a music signal without the

need to run a separate remote

turn-on wire. The unit will turn

off automatically a few minutes

after the music stops to conserve

battery power.

02

Installation

We recommend that you have

your JBL system professionally

installed by an authorized JBL

automotive dealer. However, if

you prefer to perform the instal-

lation yourself, please read the

following information in order to

get the most from your GT Series

Subwoofer.

Placement and Warnings

Your JBL speakers are designed

for the rigors of the automotive

environment and can withstand

high and low temperatures as

well as extreme humidity.

However, you can effectively

increase the life of your speakers

by avoiding installations that

expose them directly to moisture

or water. For safety and reliabil-

ity, they should be securely fas-

tened to prevent them from mov-

ing around when driving, or from

becoming dangerous missiles in

the event of an accident or sud-

den stop.

Select your mounting locations

very carefully so as to avoid cut-

ting or drilling into critical com-

ponents such as brake or fuel

lines, and electrical wiring,

which may be damaged when

drilling holes for the mounting

screws. Be especially cautious

because these components may

be hidden between double-walled

panels.

General Installation Guidelines

03

The mounting locations for opti-

mum performance will vary from

vehicle to vehicle, but in general

your Powered Subwoofer will

work well just about anywhere:

In the trunk, hatch area, or any

surface large enough to accom-

modate it. Just make sure to

keep at least 3" clearance around

the port end of the unit so that

you do not restrict port airflow.

Unlike some other brands, your

JBL subwoofer does not require

corner loading for optimum per-

formance, which means that it

may be pointed whichever way is

most convenient for your particu-

lar installation. Pointing the unit

into a corner will increase its low

frequency output, which will

please some listeners. Others

might find this increase too

much, and will prefer pointing

the unit away from the corner.

Since each vehicle model has dif-

ferent acoustic characteristics,

we recommend experimentation

with placement before perma-

nently mounting your subwoofer.

Also, leave space around the

amplifier end of the unit so that

airflow is not restricted, other-

wise the unit may overheat and

activate its protection circuitry.