JL Audio C5-400cw Speaker Placement Considerations, Diagram a Less Desirable Speaker Placement

SPEAKER PLACEMENT CONSIDERATIONS

A component system gives you the ability to place the woofer, midrange and tweeter separately in your vehicle interior. This can be good or bad, depending on how it’s done.

The C5-653 system has been optimized for installations in which the midrange and tweeter drivers for each channel are mounted as close together as possible on the same mounting plane (such as a kick panel installation as illustrated in Diagram B). This type of mounting will result in the best tonal balance and most coherent imaging. The center to center separation of the midrange and tweeter should be between 3.5 inches (89mm) and 4 inches (102mm) Any separation greater than 4 inches (102mm) from center to center of each driver is likely to result in degraded sound quality. We do not recommend mounting the tweeters in a different location than the midrange driver (Diagram A).

	Diagram A: Less Desirable Speaker Placement
Avoid placing tweeters where they will be blocked
by objects in the interior of the car (including seated
occupants). When selecting a mounting location,
look at both sides of the car to make sure that this
location is clear on both sides.
The 6.5 inch (165mm) woofers will usually be
placed into factory speaker locations and can be
separated from the midrange and tweeter by as
much as 18 inches (46 cm), without degrading sound
quality. For proper low-frequency performance,
the woofers need a fairly large air space behind
them (like the air inside of a door). Enclosing the
C5-650cw woofers in spaces smaller than 1 cu.ft
(28 liters) is not recommended if optimum low-
frequency and midbass performance is desired.
We do not recommend mounting the woofer and	Diagram B: More Desirable Speaker Placement
midrange into the same enclosed environment, as
this will cause energy from the woofer to modulate
the midrange driver, resulting in distortion and
coloration of the sound. If you are mounting the
mids and woofers into the same environment, you
will need to sub-enclose the midrange speakers in an
enclosure with a minimum of 0.08 cu.ft. (2.3 liters).
This guideline also applies to any other enclosed
application of the midrange driver:
Enclosures smaller than 0.08 cu.ft (2.3 liters) will
alter the frequency response of the midrange driver
and result in degraded sound quality.

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