Input And Controls; Input Level Control; Crossovers; Input Wiring - DLS CA12 How To Install And Operate

Input and controls

Input Wiring

Inputs may be low level from the RCA output of the
car stereo or high level from the car stereo speaker
output.Low level = RCA is to prefer for the best sound
quality.
Important
Use either the low level or the high level input, do
not use both at same time.
Low level input
Use a pair of shielded stereo audio cables with RCA
type jack. Most trunk-mount amplifiers need a 20
feet RCA cable ( appr 5 – 6 meters). Most under the
seat installations require 12
feet ( 2 – 3 meters) RCA
cables. Avoid placing the RCA
cable close to speaker cables,
power cables and remote
control cable. Connect to in-
put socket A & B.
High Level Input
Connect left and right speaker wires coming from
the car stereo to the high level input as shown. You
must connect both plus and minus as the inputs are
balanced, connecting plus only gives lower level and
bad sound quality. By changing the polarity of plus
and minus, you can change the phase.
High Input
Hi level input plug on amp.
Automatic turn on when using high level input.
With the Hi/Low input swich set to Hi, the amplifier turns
on automatically on high input. You dont need to connect
a separate remote wire from your head unit.
When using High Level input:
Set the switch to position "Hi / Level"
When using Low level input:
Set the switch to position "Low / Level"
If the switch is set to wrong
position, the amplifier still
works, but the risk for
disturbances or distortion
increases.
White : A ch.+
White/Black : A ch.-
Grey/Black : B ch.-
Grey : Bch.+
Hi level
Low level

Input Level control

The input level control, 5V – 0,25
V, matches the output of your ra-
dio to the input of the amplifier. After
installation is complete, make sure
the input of the amplifier is turned
down all the way ( counter-
clockwise at 5V ). Play a tape or
CD, make sure all bass or treble
settings or equalizer are flat, and
turn the volume of the radio up until
you just start to hear distortion.
Turn the volume control down just
a bit. On the amplifier increase the
input level control ( clockwise or to
the right ) until you just start to hear
distortion, then back the level
control just a bit. Now your radio
and amplifier levels are matched.
Subsonic filter
The Subsonic filter blocks
the very deepest frequencies
from reaching the subwoofers.
It has a variable frequency
from 15 to 50 Hz. A typical set-
ting is 25-30 Hz when used
with subwoofers.The filter can
be switched IN-OUT.
Low Pass Filter
The LPF ( low pass filter )
mostly used for subwoofers. It
will allow low frequencies only
and blocks higher frequencies.
A typical setting is 50 – 80 Hz.
The filter can be switched in
and out and you can select
between two different slopes,
12 dB/ octave or 24 dB/ octave.
Choose the slope and the set-
ting that sounds best in your
car.
CA12
Level
5 V 0,25 V
Subsonic
40Hz 100Hz
15Hz 150Hz
Off On
LPF
80Hz 200Hz
50Hz 500Hz
Off 24 dB
12dB
5