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2. One or more subwoofers
in mono bridge mode
You can use all DLS subwoofers in
this example.
Speaker impedance must be 4 ohm.
For power cable, speaker cable and
fuse size selection see page 4.
Adjust the HP- and LP-filter settings
as in the drawing
HP-filter setting: 30 Hz
LP-filter setting: 60-80 Hz
Button in
HP-filter HP-filter LP-filter PHASE LP-filter
100
20 200
Hz
HP-filter
SIGNAL INPUT
LEFT RIGHT
100
20 200
Pre out
1 107,3
FM
DLS A3 is 0,75 ohm stable. This means that you can connect three 4 ohm subwoofers in parallel
without damaging the amplifier. Two 4 ohm subwoofers connected in parallel results in a 2 ohm load
which the amplifier sees as a 1 ohm load. Three subwoofers gives a 1,33 ohm load which the
amplifier sees as a 0,75 ohm load.
LEFT FUSES
30 A x 2
Fuse
150 A
Button in
+180
IN
IN
90
50 125
OUT
0
OUT
Hz
HP-filter
LP-filter
Phase
LP-filter
IN
+180
IN
90
15 125
OUT
0
OUT
With the PHASE button
you can phase shift the
phase on the speaker
output terminals.
DC - FEED DLS A3
POWER IN
BAT+ REM GND
POWER
PROTECT
To remote
+
on stereo / CD
Battery
12 volt
Use a 2 mm hex key to speaker
LEVEL
terminals.
3,5V
Use a 4 mm hex key to DC input
terminals on A2, A3, A4
7,0V 0,2V
LEVEL
SPEAKERS
+LEFT-
+RIGHT-
3,5V
7,0V 0,2V
Subwoofer
4 ohm
ULTIMATE A3
POWER IN /POWER CAP
GND
POS+
FAN OUT
RIGHT FUSES
30 A x 2
Power
Fan12 V
capacitor
13
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