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DLS SOUND HANDBOOK - INSTALLATION
KICK-PANELS
Another installation alternative giving a good sound
image is the kick-panel. It´s placed down on the floor
in front of the door on both sides. It can contain the
whole system with bass, midrange and tweeter or a
bass and midrange with the tweeter installed on the
dashboard. The best places for the speakers must
be tested out in the respective car.
Kick-panels are normally made of MDF or particle
board and are build as sealed boxes or as membrane
boxes where the element is allowed to breath through
a membrane of foam rubber or similar.
Kick-panels are very popular in competition cars.
MOUNTING IN KICK-PANELS:
ADVANTAGES:
- Stable mounting without rattling.
- Superb sound image.
- Higher power handling capacity.
- Less affection on the cars interior.
DISADVANTAGES:
- More mounting work.
- Possibilites to damage the speaker if kicking on
them with the feets.
HIGH MOUNTED KICK-PANELS:
In some cars the kick-panel can be mounted invisible
up under the dashboard. Can create a good sound
image despite the strange mounting.
DASHBOARD MOUNTING
A mounting of the midrange and tweeter up on the
dashboard will result in an improved sound image. It
will be moved up on the dashboard. Some cars that
have suitable original dashboard mounting holes can
be used.
The tweeters should be mounted on the dashboard
or on the door poles. The woofer elements should be
mounted in a door-side or in a kick-panel. Suitable
for DLS C36, UR35i/UR36i, UP-35/UP-36 or Iridium
6.3 / 8.3.
REAR FILL
A well mounted front system is the most important in
a sound system. In some cases we also use rear
mounted speakers used as "rear fill". Rear fill
speakers will improve the front stage image by adding
a weak sound from the rear filling up the sound stage
and giving it a deep. As Rear fill speakers we can
use midrange elements in combination with a passive
or active bandpass filter, mounted in the rear. A
suitable frequency response can be from 500 - 6000
Hz. The level must be dampened easiest made with
a series resistor of 10 - 20 ohms in series with the +
lead. The rear fill speaker can also be connected in
multimode. In this case you use only one element
working as a center channel speaker.
CENTRE CHANNEL SPEAKER
A centre channel speaker can be used to improve
the sound image in installations where the speaker
mounting makes it difficult to achieve a correct sound
image.
On a DLS amplifier the centre speaker is connected
in bridge mode between Left and Right channel. The
speaker is now fed with the sum signal from left and
right channel. This will fill in what you can call the
gap in the soundstage of the earlier installation.
Your side system will hopefully be good 6,5 inch
coaxes or two-way systems or even better. A small
centre channel speaker of smaller size will have to
be feed at a lower level of volume.
In this example the signal is dampened with a 20 ohm
resistor. The level can then be adjusted with the
variable resistor. The component values can need
to be changed sometimes.
The frequency response in this example is between
550 - 6000 Hz. The component values can be
changed if you want another frequency response.
In amplifiers with built-in highpass and lowpass filt-
ers, you can use these instead of the passive band-
pass filter. A 5-channel amplifier like the CA51 is
suitable in this case.
Here is a description of a passive bandpass filter for
a 4 ohm speaker.
DLS AMPLIFIER
R-
4,7 μF
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
Centre channel speaker 4 ohm
12
L+
20Ω
15W
0-20Ω
15W
1 2 3 4
1 2 3 4
0,15
1 2 3 4
1 2 3 4
mH
1 2 3 4
1 2 3 4
50 μF
1,75
mH
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