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4
INTRODUCTION
This manual provides information on the features, instal-
lation, and operation of the Punch 4040 DSM and 4080
DSM Amplifiers. We suggest you save this manual for
future reference.
We strongly recommend you have your Authorized Rock-
ford Fosgate Dealer install your new Punch 4-channel
amplifier. If you do choose to install the amplifier yourself,
please be sure to read the entire manual before begin-
ning.
The Rockford Fosgate 4-Channel automotive stereo power
amplifiers provide state-of-the-art sound in cars, vans,
boats, or wherever a high current 12 volt power source is
available.
“Discrete Surface Mount” (DSM) technology is utilized
in the crafting of all of our Punch amplifiers. This process
provides greater ruggedness and consistency of both
components and layout. Already used heavily in aero-
space and industrial applications, this technology is also
highly advantageous in the hostile automotive environ-
ment.
Low Level Input Senstivity. The Punch 4-channel ad-
justable input circuits are designed to match almost any
music source. The amplifiers will drive most normal
speaker types.
Punch Equalization. This circuit is designed to compen-
sate for the acoustic inadequacies of the automotive
environment. This patented circuitry will correct for the
poor bass response and natural high frequency roll-off
inherent in the world of automotive stereo. The result is
full-range sound without the unpleasant changes in the
mid-range sound produced by most tone control and
equalizer circuits.
Active Electronic Crossover Modules built-into the
4040 and 4080 features 12 dB/octave Butterworth filters.
The independent crossover points in these plug-in mod-
ules allow for various configuration possibilities.
Features
and
Benefits