GTS100x OM 7/16/98 2:56 PM Page 23
Operation
Before operating the GTS100x,possible while still providing the system output, adjust the When multiple ampliŢers are
recheck all wiring connections toadequate volume levels. Using avolume control of the radio/tapeused in the system, it is best to23
make sure they are correct andhigh signal level from the sourcedeck to the point where you Ţrstadjust the gain of the ampliŢer
secure. Be sure that a 20-ampand a low gain setting on thebegin to hear audible distortion.driving the main (usually front)
fuse (not included) is installed inampliŢer will help keep back-Reduce the level just to the pointspeakers Ţrst. Then turn down
the +12V line next to the battery.ground noise levels in the where the distortion goes away.the head unitOs volume control to
Reconnect the negative groundsystem low.This is the maximum undistorteda comfortable level, and adjust
(�) terminal of the battery. MakeTo adjust a system using a singleoutput level of your head unit andthe remaining ampliŢers for the
sure that the input mode selector,ampliŢer, start with the ampliŢersignal processors, and should notdesired system balance. You will
crossover switch and preampinput sensitivity controls fullybe exceeded during use. If audi-Å¢nd this easiest to do by adjust-
mode switch are properly set.counterclockwise. Some radio/ble distortion does not occur, con-ing the ampliŢers in the following
Gain Adjustmentstape decks have additional outputtinue to increase the level untilorder: 1) front channels, 2) rear
The setting of the gain control onlevel controls or switches. Setthe head unit is turned all thechannels, 3) subwoofers. Complex
the GTS100x is important tothese to their maximum position.way up. If this setting does notsystems incorporating tri- or
ensure proper performance, lowSet the level controls on anyprovide adequate volume levels,quad-ampliŢcation can be time-
noise levels, and maximum relia-associated equipment such asgradually increase (turn clock-consuming to adjust. Your local
bility in the system. As a generalequalizers and electronicwise) the gain control of theauthorized JBL installation spe-
rule, controls on components atcrossovers to the maximum GTS100x until the system playscialist is the best person to help
the front end of the systemposition or as recommended byas loud as necessary or when thewith such adjustment.
(source, equalizers, electronicthe manufacturer. Set all Bass/Å¢rst signs of distortion are heard.
crossovers, etc.) should be set asTreble or equalizer controls to
their centered or bypassed posi-
high as possible, with the ampli-tions. While listening carefully to
Å¢er gain control set as low as |
ACEC
