Filter
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On the following pages you find some examples of how to connect the amplifier for different use. The
drawings show normal level and filter settings. The main difference between DLS A1 and A2 is the lowpass
filter and the power output. A1 has a 3-way filter selector under the bottom plate and A2 has a continously
variable filter on the front.
Remote
Pre out
DLS A1 and A2 can be connected in different ways:
1. As a stereo amplifier connected with a speaker system of coaxial, 2-way or 3-way type.
Two speaker systems can be connected in parallel, one front and one rear system.
2. As a subwoofer amplifier with max two 4 ohm subwoofers in mono bridge mode. The built-in lowpass
crossover is used. (Connect to L+ and R-).
DLS A1 has a lowpass filter with two fixed frequencies that can be set under the bottom plate.
DLS A2 has an inbuilt adjustable lowpass filter that should be set to approx. 70-80 Hz.
1. One speaker pair
connected in stereo
You can use all DLS coaxial, 2-way
or 3-way systems in this example.
The speaker impedance must be 4
ohm.
For power cable, speaker cable and fuse
size selection we refer to page 4.
+
+
-
-
FM1 107,3
Fuse
60 A
Battery
12 volt
+
FUSE
30
3,5V
7,0V 0,2V
SPEAKERS
+LEFT- +RIGHT-
HP-filter LEVEL
100
20 200
OUT
IN
SIGNAL INPUT
LEFT RIGHT
POWER
PROTECT
POWER IN
BATT+ REMOTE GND
Button out
OUT
HP-filter LEVEL
20
200
100
7,0V 0,2V
3,5V
Hz
IN
DLS A1
DLS A2
HP-filter LP-filter LEVEL
7,0V 0,2V
3,5V
OUT
20
200
100
Hz
IN
OUT
20
200
100
Hz
IN
Highpass filter
not in use.
Lowpass filter
not in use.
If you have problems with the
mid bass driver ”reaching the
bottom” (the voice coil
touches the bottom pole
plate) at high volumes, use
the HP-filter to avoid this with
a setting at 50 - 80 Hz or
higher. Make your own tests.
Both
buttons
in out
position
Use a 2 mm hexagon key to speaker terminals.
Use a 2,5 mm hexagon key to DC input terminals on A1
Use a 4 mm hexagon key to DC input terminals on A2, A3, A4
Wiring examples DLS A1 & A2
ULTIMATE A1-A2
10