Specifications
HAT-RACK MOUNTING
The best sound stage for front seat listeners is
achieved with door- or kick-panel mounting. In
competition cars the front system combined with rear
subwoofers are often the only speakers. Sometimes
they are combined with a pair of small 4" or 5,25"
speakers in the back used as "rear fill". These rear
fill speakers are connected with x-overs giving a
reproduction from 1-2 kHz and up. Tweeters are
normally not used in combination with rear fill.
The traditional hat-rack mounting with a system or
6x9" speakers requires some installation work to
create a good sound.
A new hat-rack made of particle board (22 mm) or
MDF-board (19 mm) must be produced. The original
hat-racks are normally not sufficient to use.
If you furthermore want the speakers to have a high
power handling capacity you need to make some
kind of speaker box (normally of sealed type) on the
back of the hat-rack, limiting the cone movement.
If you have a bass box in your trunk it´s necessary to
have a box for the hat-rack speakers. If not, the low
bass from the sub will have an influence on the spea-
ker cones and destroy the sound.
In many installations you must use passive filters to
the different speakers in your system. Later in this
book there are some wiring examples where passive
filters are used.
15
DLS / GENESIS IN MULTIMODE
All DLS and GENESIS (except for MONO 250) can
be used in multimode operation. Multimode means
that you from one amplifier can take three different
signals, left channel, right channel and the sum of
right and left channel.
To the sum signal you can connect one or more
subwoofers through a passive low-pass crossover.
You can also connect a center-channel speaker in
multimode. (See example on page 18).
The stereo connected speakers can be either a 2/3-
way system or coaxial speakers. To this speakers
you must use passive high-pass filters that limits the
frequency response.
The advantages of multimode operation is that a
single amplifier can be used for all speakers in the
car. It´s easy to install, it needs less space and it´s
cheaper. The disadvantages is that you need passive
crossovers and it´s difficult to adjust the sound
balance between the front system and the subwoofer.
The load capacity of the amplifier limits the number
of speakers that you can use in the system.
GENESIS series 3 amplifiers are 2 Ω stable, the mi-
nimum amplifier load is 2 ohms.
FRONT SYSTEM RIGHT CHANNEL
R-
R+
10 mH
This connection can be used with all DLS and
GENESIS amplifiers.
L+
L-
SUBWOOFER
300
µ
F
STEREO
300
µ
F
10 mH 10 mH
300
µ
F
LP-filter
LP-filter
Tweeters
with filter
Tweeters
with filter
FRONT SYSTEM, LEFT CHANNEL
SUBWOOFER INSTALLATION
An "open air" subwoofer installation in the hat-rack
or towards the back seat calls for the same baffles
of particle board or MDF-board as described above.
But the best result is normally achieved using a
separate bass box of some type. Later in this book
we will describe different types of boxes and give
advices of how to build a box.
You will also find suitable box sizes for all DLS
subwoofers.
DLS SOUND HANDBOOK - INSTALLATION
DLS / GENESIS
AMPLIFIER
MULTIMODE CONNECTION
This is an example of a typical multimode connetion
with a front system and a subwoofer. 12 dB passive
high- and low-pass filters are used in combination
with the original filters used for the front system.
All speakers have an impedance of 4 ohms.
The 10 mH coils
can be spared.
Change to 200
µF capacitors
instead of 300 µF.