Rockford Fosgate Power II Installation Manual
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ROCKFORD-FOSGATE
POWER II INSTALLATION MANUAL
IMPORTANT
The Power II amplifier is designed to be professionally installed.
The length and nature of your warranty are dramatically affected if
you attempt to install it yourself (See Warranty).
This is because professional installers are experienced with making
your car sound right the first time. Professional installers make
their installations durable because the last thing they want is to have
you come back screaming at them because your system isn't working.
If you still want to install your own unit, read the following instruc-
tions
completely....and
Good Luck!
If you decide to have your dealer install your system, throw this booklet
away and relax.
DESCRIPTION
The Rockford-Fosgate Power II is a state-of-the-art
90
Watt per channel
stereo amplifier, designed to provide top-quality sound in cars, vans,
boats, or anywhere a
9
to
15
Volt battery is available.
The Power II is designed to be used with a Rockford-Fosgate equalizer/preamplifier and any high-quality music source. There are several preamp
equalizers available, including the ZX, the Z, and the 250 preamp.
The Power II is protected by main battery line fuses and by internal
"Short
Stop"
circuitry which detects shorted speakers or internal problems
and shuts down the amplifier for about
1
second.
The Power II incorporates internal battery line filtering and extensive
ground loop prevention circuitry.
In order to get the most sound from its inverted power supply, the Power
II uses floating speaker grounds.
This also allows extremely simple
"bridged"
or
"strapped mono"
operation in special applications.
WIRING FOR THE POWER II
See Figures for wiring diagrams
Power Connection (White
12-Gauge
Wire)
The White wire must be connected directly to the positive terminal of the
battery to provide a power source with low voltage drop and low noise. If
the power wire is connected to any other point (the fuse block, for instance)
the amplifier's power output will be reduced and oscillations and noise may
distort the sound.
If the power wire must be extended, use only
12-gauge
or
larger wire and make a good splice.
The power wire comes with an in-line fuseholder for a
20-Amp
AGC (3AG)
fast-
blow fuse.
Do not use a higher-current fuse as the amplifier will not be ad-
equately protected.
Ground Connection (Black
12-Gauge
Wire )
The ground wire must be connected directly to the car chassis, near the amplifier.
Ground loops are aggravated by the length of the ground wire or any
resistance in the ground path.
For this reason we don't recommend extending
the ground wire in any installation.
The ground point in the car should be a
piece of chassis metal that is welded to the main body of the car. Painted
surfaces should be scraped or sanded clean before the ground lug is bolted down.
(Cover the bare-metal area with paint or grease to prevent rust.)
Turn-On Connection (Red Wire from 6-Pin Connector)
The Power II is turned on by applying Positive
12
Volts to the red wire. Usually,
the red wire is connected to source unit's "Accessory" or "Auto-Antenna" lead,
either of which will go positive when the source is turned on.
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