DLS SP12i Owner's Manual

P.O. Box 13029, SE-40251 Göteborg, Sweden
Tel: +46 31 840060, Fax: +46 31 844021
E-mail: info@dls.se, www.dls.se
WELCOME
Thank you for buying a DLS amplifier. The amplifier must be installed
and adjusted correctly in order to work well. This manual will show you
how to install it. Please read the entire manual before you start.
GENERAL INFORMATION
This mono amplifier is designed for use in subwoofer boxes. You can
install it on the side, or on the back wall of a subwoofer enclosure. The
amplifier front panel is not airtight so this requires a separate airtight
chamber for the amplifier in the subwoofer enclosure.
INSTALLATION IN THE BOX
When designing the enclosure for your subwoofers you must take in
consideration that you make a separate airtight compartment for the
amplifier. The depth of this compartment must be at least 50 mm (2").
CONNECTION OF THE AMPLIFIER
Connect a red wire from the battery + to the amplifier terminal marked
BATT+. Use cable size not less than AWG 7(10 mm
Use max 40 A fuse in the amplifier power cable not more than 30 cm
from the vehicle battery to protect the battery and amplifier in event of a
short-circuit between it and the power amplifier.
Connect a black wire from the amplifier terminal marked GND to the
closest negative vehicle ground. Use the same cable size for this cable
as for the + cable.
The input signal can be either low level RCA, or high level input from
the head units speaker output. The RCA connection gives the best result,
so use this if possible.
LOW LEVEL CONNECTION USING RCA INPUT
Use a suitable RCA signal cable to connect between car stereo head
unit and sub box amplifier as seen below. Set the input selector switch
to position LOW.
Remote control
Socket for a remote sub
level & phase shift control.
- +
Can be bought separately.
Battery
12 V
SPECIFICATIONS
RMS power out @ 4 ohm load
RMS power out @ 2 ohm load
Supply voltage
Frequency range
Low level input sensitivity
Phase switch
Phase control

Subsonic filter

Crossover, lowpass
Remote level & phase control
High level input
Cooling fan
Dimensions, (W x H x D), mm / inch
Fuse
Weight
DLS Svenska AB
2
).
RCA signal cable
Remote cable
FM1 107,3
Remote start
Connect a remote wire from the
remote terminal on the amplifier to
the control output on the car stereo
head unit (e.g. for electronic antenna
or amplifier).
180 W
265 W
12 - 15 volt
25 - 160 Hz
0,2 - 7 V
0 or 180 degrees
0- 90 degrees variable
25 Hz (ON-OFF)
35-160 Hz variable, 24 dB slope
Can be bought separately
Yes, with automatic start function
Built in
255 x 160 x 66 /10 x 6,3 x 2,6
1 x 35 A
1,4 kg (3,1 lb)
Subwoofer box amplifier
SBA185
HIGH LEVEL INPUT CONNECTION
Connect in parallel with rear
speakers or direct to the head unit
speaker output
Automatic remote start
When using high level input to the sub
box amplifier the amplifier turns on
automatically when you start your head
unit. You don´t need to connect a
separate remote wire. Set the input
selector switch to position HIGH.
INPUT LEVEL CONTROL (GAIN)
The input level control matches the output of your radio to the input
of the amplifier. After installation is complete, make sure the GAIN
control of the amplifier is turned down to min. Play a tape or CD,
make sure all bass and treble settings, or equalizer, are flat. Turn
the volume of the radio up until you reach a normal listening level.
Increase the gain control until you hear an increase in bass level.
You may have to alternate between finely tuning GAIN control and
LP-filter to optimize the sound.
LOWPASS FILTER (LP_FILTER)
The LP-filter allow low frequencies only and blocks higher
frequencies. A typical setting is 50 – 70 Hz.
Choose the setting that sounds best in your car.
SUBSONIC FILTER
With the Subsonic filter in ON position will reduce all frequencies
below 25 Hz. Test which setting you prefer.
REMOTE SUB LEVEL & PHASE CONTROL
A remote sub level & phase control box can be bought separate.
This control box allows you to adjust sub level & phase from the
front of your vehicle.
PHASE CONTROL & PHASE POLARITY SWITCH
The phase control on this amplifier uses a phase polarity switch
(NORMAL / INVERT), and a variable phase control adjustable from
0-90 degrees.
1. Before adjusting the phase, you must adjust the GAIN control
and LP-filter to a setting where you experince a good sound. The
phase control should be at 0-position when doing this, and the Phase
polarity swich in position NORMAL.
2. Now use the Phase polarity switch to chose which setting that
gives the best bass sound when you listen in the front seat.
3. After making this choise you can go on and adjust the variable
phase control. Turn it slowly clockwise and stop at a position where
you experience the bass sounds is best, and appears to come
from the front of your car.
If you for some reason readjust the gain control or LP-filter after
doing this, you must also readjust the phase control.
SPEAKER
CONNECTION
The subwoofer is
connected to the
spade terminals P4
& P5 on the Printed
Circuit Board of the
amplifier. Do not sol-
P5 P4
der the cables
direct to the termin-
als.
Warranty service
This product is covered by warranty, depending on the conditions in
the country where it is sold. If it i is returned for service, please
include the original dated receipt with the product.
INPUTS
High level
Left + Right +
Left -
Right -
FM1 107,3
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6