13
You now have an adequate
5-channel system
with a voluminous sound.
Caution: In this case
(5-channel system in a 3-channel mode), the
rear loudspeakers are driven by the radio sig-
nal without inclusion of the amplifier. Thus, the
signal of the AUX-Input of the PP20 AUX can
not be reproduced via the rear loudspeakers
RR and RL.
2
Level controls for input sensitivity
These controls can be used to match the input
sensitivity for the channels front and rear.
Caution
:
Please be very careful with the volume
if you set up the input sensitivity. To prevent
damage to the loudspeakers, avoid excessive
volume for too long periods which is noticable
by an unpleasant distorted sound. Please no-
tice the chapter on optimizing the volume set
up on page 14 of this manual!
3
AUX-Input (only PP20 AUX)
3,5 mm jack plug for connecting a navigation sys
-
tem, iPod, mp3-players etc:
The intelligent AUX-Input of the PP20 AUX auto-
matically detects input signals of external devices.
After connecting an external device to the PP20
AUX, its signal will be rendered and the radio si-
gnal will be muted. If there is no signal for more
than ca. 3 seconds at the
AUX-Input
, the amplifier
automatically switches back to the radio signal.
Please note:
The operation mode can be swit-
ched to navigation mode via a switch below the
bottom plate. In the navigation mode the AUX si
-
gnal is only transmitted to the two front loudspea-
kers and the radio signal on the two rear speakers
is lowered during the navigation announcements.
Please contact you dealer for further informa-
tion or assistance.
The volume of the AUX-Input has to be set up
direcly at the extenal device. Please note that
the PP20 AUX will not detect the signal if the
volume of the external device is too low. In this
case it will automatically render the radio signal.
4
5-V-Output (only PP20 AUX)
5V Mini-USB Charger for the power supply of a
navigation system, iPod, mp3-player etc. The
power supply is also provided if the PP20 AUX is
switched off. If the battery voltage falls below 11.5
V, the voltage switches off automatically in order to
protect the battery. The maximum charge current
is limited to 500mA.
5
Remote
The Remote connector can be used as an input
or an output.
If the PP20/AUX cannot be switched on via the
radio, you can use the 6.3mm blade terminal as
input. Using it as an output, you can control further
external devices with this blade terminal, such as
an active subwoofer.
6
HELIX Plug‘n Play Connector
The connector has to be used for connecting the
provided cable harness. Please use the provided
HELIX cable for this connection exclusively!
Cau-
tion: The use of other or similar cables can re-
sult in the damage of the amplifier, of the head
unit / radio or the connected loudspeakers!
7 CPS - Colour Protection System
The LEDs show the operation mode of the am-
plifier:
red
= overheating
green
= in operation
yellow
= undervoltage
8 GND-Schalter
Occasionally alternator noise may appear in a
system because the source unit and amplifier are
using different grounding schemes. To help in this
situation, we have provided alternative grounding
connections.
GND:
Signal ground and vehicle ground
are connected
ISO:
Signal ground and vehicle ground
are not connected (isolated ground)
200 Ohm:
Signal ground and vehicle ground
are connected via a 200 ohms
resistor
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