Operation Manual
33
E 
CONNECTING 
                                             C109/C209/C409/C509
IMPORTANT: DISCONNECT THE +12V MAIN POWER CABLE 
FROM YOUR CAR BATTERY BEFORE ANY CONNECTING WORK 
IS CARRIED OUT!
Recommended Power Cable Cross-Sections and Main Fuse 
Values (for +12V and Ground cable based on 5m +12 V cable)
 Model  Cross-Section  Main Fuse
 C109
20 mm²  60  A
 C209
8-20 mm²  30-40 A
 C409
20 mm²  60 A
 C509
20 mm² 
60 A
It is recommended to connect your amplifier in the following 
sequence:
1 
Make sure your head-unit is turned off and the volume control 
is in its minimum position.
2 
RCA outputs of your head-unit to respective RCA inputs of your 
amplifier (see „Connecting Diagrams“). 
Sub pre-outs from head-unit should be fullrange signals because 
lowpass pre-out signals always affect the filtering electronics of amp-
lifier! In case of doubt just 'double' a fullrange front or rear pre-out 
by using Y-adaptors.
3 
Remote lead connection from head-unit to amplifier.
4 
Speaker cables to respective speakers or passive crossovers. 
Make sure to maintain polarity! "" to "" and "" to "". 
For Mono 1-channel mode use of 4/2-channel models, connect the 
two terminals "" and "" marked with BRIDGE!
Min. impedance for bridged mode is 4 Ohms!
5 
Ground connection to chassis ground or -12 V negative battery pole. 
If possible keep ground cable as short as possible and make
sure the chassis contact is well sand-papered, i.e. clean from any 
paint, rust or dirt for maximum contact.
6 
+12 V power connecteonto positive battery pole. Do not 
forget to install a main fuse within 30 cm of car battery (fire 
hazard)!!!
Do not connect +12 V cable to battery before re-checking every 
other connection on the amplifier!
Turn-on your head-unit keeping your volume at the lowest setting. 
The green status LED on front of the amplifier heat sink should light 
up now. If not, turn-off your head-unit and re-check all wiring to and 
from the amplifier for missing or faulty connections.
C109-509 Manual DEF.indd 33C109-509 Manual DEF.indd 33 15.02.2005 15:30:32 Uhr15.02.2005 15:30:32 Uhr










