GTQ 360 new 7/17/98 10:44 AM Page 3
1. Introduction
1.1 Thanksfor purchasing your new
GT series automotive multi-channel2. Installation and Use
ampliŢer. Your GT series ampliŢer will
easily connect to virtually any car audio2.1 Refer to the OSpeaker-Level Input
system, whether it is factory installed orImpedance Adjustments� and OCrossover
purchased separately. The GTQ360 andFrequency Adjustments� sections of this3. Mount ampliŢer in the desired location
GTQ240 include an abundance of uniquemanual (page 7) to see if you will need tousing the included screws.
features which are described in this man-make alterations to the factory settings. If4. Connect power wiring as shown in the
ual. The �exible design of their built-inyou are not using the built-in crossover,Wiring Diagram.
crossover circuitry allows elaborate sys-Also, the built-in active cross-over pro-or the speaker-level inputs, you may skip5. Connect the outputs from the head unit
tems to be built more simply than withvides either full-range, high-pass or low-this step.to the appropriate inputs of the ampliŢer
conventional components. For optimumpass operation. This lets your GT series1. Disconnect the negative cable from theaccording to the Wiring Diagram with
performance, the power ampliŢer circuit-ampliŢer power either subwoofer or com-battery. Note: If the vehicleOs radio fea-either (or both) high-quality low-level sig-
ry is a fully-discrete design notable for itsponent speakers in a bi-ampliŢed system,tures a code-type security system, makenal cables with RCA plugs, or the supplied
low distortion and unusually clean andor conventional full-range speakers incertain you know the code before discon-speaker-level input connector.
clear sound quality.simpler systems.necting the battery!6. Connect the speakers to the ampliŢer
In addition to conventional preamp-levelThe GTQ360 and GTQ240 also include2. Run a power cable complete with aaccording to the Wiring Diagram.
inputs, the GTQ360 and GTQ240 featurepreamp-level outputs which can providefuse (not included) directly from the posi-7. Turn the gain controls to the
JBLOs Universal Interfacea design, whicheither full-range, high-pass or low-passtive +12V battery terminal to the desired1/4-position for all groups.
facilitates simple connection to factorysignal to drive additional ampliŢers. ThisampliŢer location. Keep the fuse within 6"8. Set the bass boost of each group to the
radios with the low distortion that is usu-lets you build systems of virtually anyof the battery terminal, and position itdesired position.
ally only associated with preamp leveldesign without requiring a separate elec-before the wire runs through any metal9. Set the crossover switches for each
connection. With the Universal Interfacetronic crossover.partition. A minimum of #10AWG isgroup as desired.
on the GTQ360 and GTQ240, a factoryrequired for the GTQ240 and #8AWG for10. Set the Group 2 Input as desired.
radio can either be used as the main1.2 About Installationthe GTQ360. The GTQ240 requires a 30A11. Set the mode switches to Stereo,
music source or simultaneously com-Although the GTQ360 and GTQ240 arefuse, the GTQ360 a 60A fuse.Left + Right, or Left Input Only operation
bined with a CD player or changer thatdesigned to make installation as easy asNote: All wiring connections should befor each group.
has volume-control capability. By provid-possible, these are extremely sophisticat-made either by soldering with heatshrink12. Double-check your switch settings.
ing this two-unit direct connection,ed products that require proper installa-tubing insulation, by using commerciallyReconnect the negative battery cable.
Universal Interface circuitry eliminates thetion and setup to realize their full perfor-available high-quality distribution blocks,Note: Incorrect switch settings can dam-
need for an FM modulator to interface amance potential. If you feel you do notor with high-quality crimp-type insulatedage your speakers!
CD player to factory radios, improving thehave the necessary knowledge and skills,connectors installed with a professional-13. Turn on the signal source at a low vol-
Å¢delity of digital playback.we strongly recommend that the installa-type, articulated crimping tool. Solderingume level, and check for the correct out-
In addition, when using a high-poweredtion be done by your authorized JBL deal-crimp-type terminals is recommended forput from each speaker.
(BTL) radio through the speaker-leveler.additional security. Never use wire nuts,14. Adjust the ampliŢer gain controls
inputs, Common Sense turn-on circuitryIf you choose to install the GTQ ampliŢerinsulation-displacement connectors (i.e.,using the procedure described in the
senses the common-mode voltage pres-yourself, read all of the information in thisScotchLok type), or twist and tape con-OAdjusting the Gain� section.
ent on the radioOs speaker wires, turningmanual before you start the installation.nections. Do not use electrical tape; it will15. Read the rest of the manual to get
the ampliŢer on without an additionalPay particular attention to the safety pre-loosen with age and extreme maximum use and enjoyment from your
remote wire.cautions and notes.temperatures.ampliŢer.
3 |
ACEC
JBL
