8
Door Installation:
In order to achieve optimal frontstaging, the tweeters should not be placed too deeply in the
door area. They should be installed, for instance, at shoulder height and as far forward as possible, in the vicinity of
the instrument panel. Suitable installation positions here are the side view mirror area and the upper door lining.
Placing the tweeters on diagonal spacer rings (about 20
°
) can be tonally advantageous, if thereby the arrangement
is done in such a way that the left tweeter radiates to the right door and/or right seat and the right tweeter radiates
sound toward the left door and/or the left seat. (In order to achieve optimal tweeter placement the scenario
described above should be followed.)
The midrange should be placed, whenever possible, between the tweeter and woofer, with preference being given
to proximity to the tweeters.
When possible, the woofers should be placed in the bottom area of the door lining. The distance between tweeters,
midrange, and woofers should be kept as small as possible, to prevent the sound of the loudspeakers from being
negatively impacted. (fig. 1). In order to achieve optimal woofer performance, i.e., kickbass, the total door space
must be used. That means that the splash guard on the doors must be cut in an u-shape in the woofer area and fixed
against resonating. In addition it must be made certain that the woofer is sealed to the door lining to avoid an
acoustical short-circuit. The door space should, in order to promote the flow of the sound waves, be loosely draped
with an absorbent material. A further measure helpful for optimization of sound is suppressing the resonance of the
door metals (on the door inside) with special absorbent mats. If the door lining has a tendency to resonate, a
wooden plate should be installed for further support. If this is not possible, foam material can be used to lessen the
effect. For installations in linings of 2-door vehicles the same procedures and considerations are recommended.
Figure 1: Positioning the Loudspeakers in Doors.