21
Follow the subsequent steps to perfectly adapt
the signal processors input sensitivity to your
signal source:
1. Don‘t connect any amplifiers to the outputs
of the DSP MINI MK2 during this setup.
2. First turn on the signal processor and then
start the software. The function can be found
in the “Signal Management” tab of the DCM
menu under the item “Main Input → Input
Gain“.
3. Adjust the volume of your radio to approx.
90 % of the max. volume and playback an
appropriate test tone, e.g. pink noise (0 dB).
4. If the clipping indicator in the DSP PC-Tool
already lights up (see picture below), you
have to reduce the input sensitivity using the
scroll bar until the indicator turns off.
5. Increase the input sensitivity until the clip-
ping indicator lights up. Now turn the control
back until the indicator turns off again.
5. Connection to power supply
Make sure to disconnect the battery before
installing the HELIX DSP MINI MK2!
Solely use the included screw-type terminal to
connect the HELIX DSP MINI MK2 to a pow-
er supply. Make sure of correct polarity. The
ground wire must be connected to the vehicle
chassis at a non-insulated point. Inadequate
grounding causes audible interference and
malfunctions.
The positive wire has to be connected to the
battery’s positive post or a power distribution
block. Though the current draw of the HELIX
DSP MINI MK2 is rather low (approx. 480 mA)
we recommend a minimum wire gauge of
1 mm² / AWG18 for both power supply wires.
6. Connecting the remote input
The remote input of the
Power Input
has to
be connected to the radio remote output if the
signal processors lowlevel
Line Inputs
or the
Optical Input
are / is used as signal input/s. We
do not recommend controlling the remote input
via the ignition switch to avoid pop noise during
turn on / off.
If the H
ighlevel Input
is used this input does not
need to be connected as long as the car radio
has BTL output stages.
7. Configuration of the remote input
The DSP MINI MK2 will be turned on automat-
ically if the
Highlevel Input
is used or if a signal
is applied to the remote input terminal. The
Auto
Remote
switch (page 18, point 4;
Auto Remote
)
allows to deactivate the automatic turn-on fea-
ture of the highlevel inputs. The feature should
be deactivated (Auto Remote = Off) if there are
e.g. noises while switching on / off the signal
processor.
Note:
If the automatic turn-on function is deac-
tivated it is mandatory to use the remote input
terminal to power up the signal processor! The
highlevel signal will be ignored in this case.
Note:
The automatic turn-on feature of the
highlevel inputs is activated by default.
8. Configuration of the DSP
The general DSP settings should be con-
ducted with the DSP PC-Tool software be-
fore using the signal processor for the first
time.
Ignoring this advice may result in damaging the
connected amplifiers / the loudspeakers. Infor
-
mation about connecting the DSP MINI MK2 to
a computer can be found on page 22.
9. Connecting the remote output
This output (Remote out) is used to supply re-
mote signals to the external amplifier/s. Always
use this remote output signal to turn on the
amplifier/s in order to avoid on / off switching
noises.
