DLS ULTIMATE A1 Owner's Manual page 13

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
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
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
LEVEL
3,5V
7,0V 0,2V
LEVEL SPEAKERS
+LEFT- +RIGHT-
3,5V
7,0V 0,2V
Subwoofer
4 ohm
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.
ULTIMATE A3
POWER IN /POWER CAP
GND POS+
FAN OUT
RIGHT FUSES
30 A x 2
Power
Fan12 V
capacitor
13