20
Example 2: Speaker wiring with active crossover to a front speaker system
and one or more subwoofers
Filter settings:
Front:
HP-filter 4 kHz with x20-
switch in x20 position
Rear:
HP-filter 80 Hz or fullrange
LP-filter IN, setting 4 kHz with
x10 switch in position x1
Sub:
LP-filter 70-80 Hz
Use one, two or three RCA-cables
for signal from head unit to amplifier.
See page 6 for detailed instructions
Button in
Button in
Switch settings in this example
HP: x20
LP: x1
ULTIMATE A7
Amplifier front
x 20
x 1
HP
x 1
x 10
LP
Input
Front
Rear
Input
Sub
Input to
front, rear
& sub
Input to
rear
& sub
Sub input
common
Sub input
separate
WIRING EXAMPLES A7
FRONT SPEAKERS
+LEFT- +RIGHT-
REAR SPEAKERS
+LEFT- +RIGHT-
SIGNAL INPUTS
FRONT REAR
LEFT RIGHT LEFT RIGHT
3,5V
7V 0,2V
3,5V
7V 0,2V
LEVEL
x20 change
by bottom switch
240
80 400
Hz
OUT
IN
HP-filter
240
80 400
Hz
OUT
IN
HP-filter
2
0,3 4
kHz
OUT
IN
LP-filter
LEVEL
x10 change
by bottom switch
FM
1 107,3
Pre out
front
Pre out
rear
+
+
-
-
Button in
HP-filter setting:
4 kHz
Tweeters with active high-pass
x-over setting at 4 kHz
HP-filter setting:
80 Hz
LP-filter setting
: 4 kHz.
Midbass/midrange speakers with
active low-pass x-over setting
at 4 kHz
+
+
-
-
DC - FEED DLS A7
For DC-feed, see page 4
LP-filter:
70- 80 Hz
Subwoofer
2 - 4 ohm
Remote Bass Level
& Phase control
Phase
Level
SUB-WOOFER
+
SPEAKERS
-
Low-pass
LEVEL
3,5V
7,0V 0,2V
90
50 125
O 180
Degree
90
PHASE
FILTER
FM
1 107,3
Level
OUT
IN
SIGNAL INPUT
LEFT SUB RIGHT
Remote Bass
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.
