HELIX P TWO Manual page 17

ly recommend to only use volume controlled audio
sources!
Note: This amplifier can only handle stereo input
signals and no MP3- or Dolby-coded digital audio
stream!
Note: It is possible to use the Optical Input and the
High level Input or lowlevel Line Input at the same
time.
Output Channels
13
Speaker outputs to connect speaker systems. The
impedance per channel must not be lower than
2 Ohms.
Fuse LED
14
The Fuse LED indicates the operating mode of the
amplifier.
Green: The amplifier is ready for operation.
Red: A malfunction has occurred that may have dif-
ferent root causes. The HELIX P TWO is equipped
with protection circuits against over- and undervolt-
age, short-circuit on loudspeakers and reverse con-
nection. Please check for connecting failures such
as short-circuits or other wrong connections. If the
amplifier does not turn on after that it is defective
and has to be sent to your local authorized dealer
for repair service.
Flashing red: The amplifier is overheated. The in-
ternal temperature protection shuts down the de-
vice until it reaches a safe temperature level again.
Flashing red / green: The fuses inside the device
are destroyed. Please check the fuses and, if nec-
essary, replace them. They may only be replaced
by identically rated fuses (3 x 30 Ampere) to avoid
damage of the amplifier.
GND
15
The ground cable should be connected to a com-
mon ground reference point (this is located where
the negative terminal of the battery is grounded
to the metal body of the vehicle) or to a prepared
metal location on the vehicle chassis i.e. an area
which has been cleaned of all paint residues. Rec-
ommended cross section: min. 16 mm² / AWG 6.
REM
16
The remote lead should be connected to the remote
output / automatic antenna (aerial positive) output
of the head unit / car radio. This is only activated
if the head unit / car radio is switched on. Thus the
amplifier is switched on and off together with the
head unit / car radio. This input needn't to be as-
signed if the Highlevel Input is used.
+12 V
17
Connect the +12 V power cable to the positive ter-
minal of the battery. Recommended cross section:
min. 16 mm² / AWG 6.
Auto Remote
18
The P TWO will be turned on automatically if the
Highlevel Input is used or if a signal is applied to
the remote input (REM) terminal. The Auto Remote
switch allows to activate / deactivate the automatic
turn-on feature. The feature should be deactivated if
there are e.g. disturbing noises while switching on/
off the amplifier.
Note: If the automatic turn-on function is deactivat-
ed it is mandatory to use the remote input to power
up the amplifier! An automatic turn-on via the high-
level signal is then no longer possible.
SPDIF Direct In switch
Due to the SPDIF Direct In switch inside the device,
the input stage of the P TWO can be bypassed and
the input signal of the Optical Input directly routed
from the integrated DA converter to the internal
power stage. To activate the direct signal routing
you have to open the device and change the po-
sition of the SPDIF Direct In switch. Therefore re-
move the ten Allen head screws of the bottom plate
to get access to the switch. It is located near by the
"Made in Germany" imprint (see marking in the fol-
lowing picture).
17