Dragster DAK Serie Manual De Instrucciones página 4

channels 3 and 4 and bridge those channels to
the subwoofer. Use "Y" adaptors to mix channels
1 and 3 input them into RCA channel 1, then mix
channels 2 and 4 and input them into RCA channel
2. The result will be preserved Left and Right
balance with constant subwoofer output.
Check scheme #3 at page 26
HIGH LEVEL INPUTS / SMART TURN ON
(ALL MODELS)
Many factory radios do not have preamp outputs
thus all DAK Series models feature High Level
inputs. High Level inputs, also referred to as
speakers level inputs, allow you to connect to the
factory speaker wires. They are also called High
Level inputs because they convert the high voltage
running through factory speaker wires to one the
amplifier can handle. These inputs will provide
the end user with clean, well defined sound for
optimal musical enjoiment.
The Smart Turn On feature allows the amplifier to
automatically start when ever it senses current or
sound signal.
No need any particular setting or regulation.
WARNING:
Do not use RCA and High Level Input at the
same time.
Do not keep the speakers hooked up to the
High Level Input once you are using them as
the amplifiers signal input.
Check scheme #4 at page 27
4
SETTING AND ADJUSTING
THE SYSTEM
SUBSONIC FILTERING
For subwoofer installation with a passive LP
crossover using models DAK featuring 2 or 4
channel, you can set the amplifier's CROSSOVER
MODE selector to HIGH PASS while setting the
FREQUENCY KNOB to 30Hz, this will act as
SUBSONIC FILTER for all signal below 30Hz. This is
especially useful for vented enclosures where the
port tuning frequency falls below the subwoofer
tuning frequency to protect against subwoofer
unloading. Models DAK 1001 and DAK 1501 come
with a built in subsonic filter that ranges from 10Hz
to 50Hz.
GAIN ADJUSTMENT
Once the system is operational, the first thing to do
is set all crossover points to approximate settings.
In the case of the basic subwoofer system LOW
PASS filter crossover at 100Hz or so. Set the BASS
EQUALIZER controls to 0dB (Flat Switch Position).
Now you should set the amplifiers input sensitivity
adjustment. The control marked GAIN adjusts the
input sensitivity from 6 Volts to 0.2 Volts. To adjust
the input sensitivity, turn the control using a small
flat head screwdriver fully counter clock wise to
the minimum position. Do not apply any pressure
while turning as this might break the control
unit. Adjust your radio volume level to maximum
volume. Now turn the level control on the
amplifier clockwise towards the Maximum marking
until audible distorsion occurs. When you begin to
hear any distorsion in the sound, back down one
notch and your amp is set. It is helpful to have a
second person to help you set the gain.
When setting up a multi-amp system set each
amplifier's gain separately. Start off with the
bass amplifier, then adjust amplifier's level
control to match. Once you are satisfied with the
level control settings, use any equalizer controls
to adjust the system tonal level for personal
preference. Keep in mind that after equalizing,
you may have to go back and reset the amplifiers
level controls. The level control of any car amplifier
should not be mistaken for a volume control. It
is a sophisticated device designed to match the
output level of your source unit to the input level
of the amplifier. Do not adjust the amplifer gain
to maximum unless your input level requires it.
Your system can also be extremely sensitive to
noise when the LEVEL is at to maximum and does
not match your input signal. The gain adjustments
need to be made only once when first setting up
the system.
WARNING: If your system has been
professionally installed please do not change
the gain settings set by the installer, he is the
professional!
4 CHANNEL USING THE ELECTRONIC CROSSOVER
(DAK 804, 1204)
The 4 channel models feature separate crossovers
for channel 1-2, 3-4. All the DAK Series feature
12dB per octave fully adjustable low pass and
high pass electronic crossovers.
LOW PASS SYSTEMS
For Low Pass systems, set the CROSSOVER MODE
switches to LOW PASS. Now the knob marked
LOW PASS will control the low pass frequencies
from 50Hz to 250Hz (DAK 1001, DAK 1501); 50Hz
to 500Hz (DAK802, DAK1202, DAK804, DAK1204).
A frequent mistake made is settig the low pass
frequency too low, especially when using vented
subwoofer enclosures. We recommend that for
most installations you do not set the frequency
knob lower than 100Hz (the 12 o'clock position) in
X1 mode.
4 CHANNEL AMPLIFIER CLONE FEATURE
(DAK 804, 1204)
The DAK 804 and 1204 feature a unique CLONE
FUNCTION to assist in setting up a 2-channel
bridged system with perfect gain and crossover
tracking between the speakers. Typically when
setting up a system you would need to set up
channel 1 - 2 and then channel 3 – 4 crossovers
and gains separately not guaranteeing perfect
balance or frequency cutoffs. By using the CLONE
FUNCTION you can control channels 1 – 2 from
the processed signals of channel 3 – 4 thereby
guaranteeing that all 4 channels are getting
identical voltages and have their crossover settings
identical frequencies.
See scheme #5 at page 27