404/504 MANUAL.QXP 7/17/98 11:39 AM Page 13
optimum for your application and listeningleading to ammeters or tachometers.
habits.Distortion is usually the result of
Following these guidelines will provideoverdriving one or more components in
virtually distortion free sound reproductionthe system. The problem is most likely
and long loudspeaker life.insufficient amplifier power, or improper
setting of gain controls. Refer to the
instructions which came with the
In Case of Difficultyelectronics for assistance. The 404 and
The most common difficulties are504GTi will not play as loudly, or handle
noise, distortion, and intermittentthe full rated power, when used without a
connections.subwoofer and associated high-pass
System noise is usually not the fault ofcrossover. When using the 404 or 504GTi
the 404 or 504GTi. Hiss or Oalternatorfull-range, be careful to limit the volume
whine� is most often the result of faultylevel to that which can be reproduced
grounding of the system electronics orwithout audible distortion from the speaker.
improper setting of amplifier level controls.If you want to talk to us about any
An exception to this is if the passiveproblems, call JBL Customer Service at
crossover networks are mounted near a1-800-336-4JBL (4525) between 9AM and
source of radiated noise, the network may5PM eastern time.
pick-up this noise with sufficient power to
drive the 404 and 504GTi. For this reason,
be careful not to mount any passive
crossovers near wires carrying high
currents such as battery cables or wires
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