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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
Subwoofer
4 ohm
FM1 107,3
With the PHASE button you
can phase shift the phase
on the speaker output
terminals.
Pre out
Fuse
150 A
Power
capacitor
Fan12 V
RIGHT FUSES
30 A x 2
30
30
30
30
LEFT FUSES
30 A x 2
+
Battery
12 volt
To remote
on stereo / CD
POWER IN
BAT+ REM GND
POWER IN /POWER CAP
GND FAN OUT POS+
PROTECT
POWER
HP-filter HP-filter LP-filter Phase LP-filter LEVEL
SPEAKERS
+LEFT- +RIGHT-
3,5V
7,0V 0,2V
OUT
IN
0
+180
SIGNAL INPUT
LEFT RIGHT
90
15 125
OUT
IN
100
20 200
Button in
Button in
HP-filter HP-filter LP-filter PHASE LP-filter LEVEL
7,0V 0,2V
3,5V
0
+180
OUT
IN
OUT
IN
Hz
50 125
90
Hz
20 200
100
DLS A3 is 1 ohm stable. This means that you
can connect two 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.
If you have a 4 ohm sub with dual voice coils
you can connect the coils in parallel.
DC - FEED DLS A3
HP-filter setting: 30 Hz
LP-filter setting: 60-80 Hz
Use a 2 mm hexagon key to speaker terminals.
Use a 2,5 mm hexagon key to DC input termin-
als on A1
Use a 4 mm hexagon key to DC input terminals
on A2, A3, A4
ULTIMATE A3
13