Input Level Controls; Power Connection; Fuse Selection; G R O U N D Connectlon - Rockford Fosgate PUNCH 30 Installation Manual

INPUT LEVEL CONTROLS

POWER CONNECTION

The Punch input level controls are accessible with a jeweler's screwdriver through two holes
in the cover. The controls are factory-preset to a level which matches most 500 millivolt to 1 volt
rated preamp-output source units.
If you are using the speaker - output leads of the source unit, turn the Punch input controls fully
counterclockwise to their minimum gain position.
If the volume control of the source is "touchy" and/or noisy-that is, if just a little volume from the
source drives the amplifier into distortion - reduce the Punch input gain controls so that the
distortion doesn't start until the source volume is at about 3/4 of its rotation.
If maximum volume from the source won't drive the Punch into distortion, increase the Punch
input gain controls until distortion starts at about 3/4
The B+ terminal on the Punch must be connected directly to the positive terminal of the battery
with the proper size fuse (type 3AG) and wire. (see Table 1). This provides a power source with
a low voltage drop and low noise. If the power is connected to any other point (the fuse block,
the sound.
The ground terminal on the Punch must be connected directly to the car chassis with large
gauge wire. 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.)
If the power wires must be extended, use only 12-gauge
Avoid running the power wires near the input cabling antenna, power leads, sensitive equip-
ment or harnesses. The power wires carry substantial currents and could induce noise.
Model
Punch 3 0
Punch 4 5
Punch 7 5
Punch 150
TABLE 1
B+ Fuse B+ Wire B+ Wire
B+ Fuse
(Mine with white wire)
7-Amp 1 4 Gauge
15-Amp 1 2 Gauge
15Amp 1 2 Gauge
25-Amp 1 2 Gauge
2
volume.
or larger wire and make a good splice.
Size GND Wire GND Wire
(White) (Black)
1 4 Gauge
1 2 Gauge
1 2 Gauge
1 2 Gauge
Size