Installation - HELIX V TWELVE DSP MK2 Manual

Installation

The HELIX V TWELVE DSP MK2 must be con-
nected as follows:
Caution: Carrying out the following steps will
require special tools and technical knowledge. In
order to avoid connection mistakes and / or dam-
age, ask your dealer for assistance if you have any
ques tions and follow all instructions in this manual
(see page 25). It is recommended that this unit will
be installed by an authorized HELIX dealer.
1. Connecting the pre-amplifier inputs
Use the correct cable (RCA / cinch cable) to con-
nect these inputs to the pre-amplifier / lowlev-
el / cinch outputs of your head unit / car radio
or factory installed amplifier. Each input can be
assigned to any output using the DSP PC-Tool
software. The automatic turn-on circuit does not
work when using the pre-amplifier inputs. In this
case the remote input has to be connected to
activate the HELIX V TWELVE DSP MK2.
Important: It is strictly forbidden to use the
Highlevel and lowlevel Line Input of an individ-
ual channel at the same time as this may cause
severe damage to the lowlevel line outputs of
your head unit / car radio / factory installed
amplifier. Nevertheless it is possible to use the
Highlevel Input of one channel and the lowlevel
Line Input of another channel simultaneously.
2. Connecting the highlevel speaker inputs
The highlevel loudspeaker inputs can be con-
nected directly to the loudspeaker outputs of
an OEM radio, aftermarket radio or factory in-
stalled amplifier using appropriate cables (loud-
speaker cables with 1 mm² / AWG 18 max.).
We recommend the following channel assign-
ment if a common car radio will be connected to
the signal processor:
Channel A = Front left
Channel B = Front right
Channel C = Rear left
Channel D = Rear right
Actually it is not mandatory to use all high level
speaker inputs. If only two channels will be con-
nected we recommend to use the channels A
and B. Make sure that the polarity is correct. If
one or more connections have reversed polarity
it may affect the performance of the amplifier.
30
If this input is used the remote input does not
need to be connected as the amplifier will au-
tomatically turn on once a loudspeaker signal
is received.
3. Connecting a digital signal source
If you have a signal source with an optical digi-
tal output you can connect it to the amplifier
using the appropriate input. In standard con-
figuration the manual activation via an optional
remote control is configured.
Alternatively you can activate the automatic
turn-on feature in the DCM menu of the DSP
PC-Tool software. The feature activates the
digital input as soon as a digital audio signal is
detected.
The automatic turn-on circuit does not work
when a digital input is used. Therefore it is man-
datory to connect the remote input (REM).
Important: The signal of a digital audio source
normally does not contain any information
about the volume level. Keep in mind that this
will lead to full level on the outputs of the HELIX
V TWELVE DSP MK2 and your connected
amplifiers. This may cause severe damage to
your speakers. We strongly recommend to use
an optional remote control for adjusting the vol-
ume level of the digital signal input!
Information: The HELIX V TWELVE DSP MK2
can only handle uncompressed digital stereo
signals in PCM format with a sample rate be-
tween 12 kHz and 96 kHz and no MP3- or Dol-
by-coded digital audio stream!
4. Adjustment of the input sensitivity
Attention: It is mandatory to proper-
ly adapt the input sensitivity of the
V TWELVE DSP MK2 to the signal source in
order to avoid damage to the amplifier.
The input sensitivity can be adjusted via the
DSP PC-Tool software and by repositioning
jumpers inside the device. The setting will be
undertaken in two steps:
1. Pre-adjustment of the value range using the
jumpers inside the device.
2. Exact adjustment of the input sensitivity by
using the DSP PC-Tool software.