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4. WIRE ROUTING & CONNECTION
4.3 CONNECTION OF POWER CABLES
Run the positive power cable ("+12 V") directly from the po-
sitive terminal of the car battery to the amplifier. For pro-
tection of your car audio system and your entire car against
electrical fire hazards from a short-circuit of the main power
cable with chassis ground, you must insert a main fuse (hol-
der) within the first 30cm of the battery. The fuse type/value
should be matching the limitations of your main power cable
and the requirements of your car audio amplifiers. Prefera-
bly a 60 Ampere main fuse for this amplifier with an appro-
priate power cable cross-section.
Now you route the ground cable to the amplifier. It is best
to keep the ground cable ("-12V") as short as possible, i.e.
to find a chassis contact very close to the amplifier. The gro-
und power cable must have the same cross-section as the
positive power cable. Keep in mind that audible interferen-
ces and problems originating in the power supply of the am-
plifier, are mostly based on a bad ground contact. So a good
(and clean) grounding to the vehicle chassis is absolutely
crucial, to obtain best performance of your amplifier.
4.4 POWRING UP THE AMP
Close the electrical circuit of the power supply by inserting
the main fuse, or re-attaching the negative battery pole. The
blue status LED of your amp should now be illuminated, to
show that your amp is operating flawlessly. If the red (PRO-
TECT) LED is lit, one or more cables are not connected pro-
perly – in such a case please double check all previously de-
scribed steps how to connect your amplifier.
4.5 MINIMUM IMPEDANCE LOAD
The output stages of the RODEK R650FRD amplifier are de-
signed to give you high output power into 4 or 2 ohms loads
in normal stereo configurations. In bridged mode, the mini-
mum impedance load is 4 ohms.
Do not connect louds-
peakers with an impedance that is below the recom-
mended minimum load stated above!
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