Rockford Fosgate 4-CHANNEL AMPLIFIER User Manual
DSM
4-CHANNEL AMPLIFIER
OWNER'S MANUAL
®®
Dear Customer,
Congratulations on your purchase of the world's finest brand of car audio
amplifiers. At Rockford Fosgate we are committed to musical reproduction at
its best, and we are pleased you chose our product. Through years of engineering expertise, hand craftsmanship and critical testing procedures, we have
created a wide range of products that reproduce music with all the clarity and
richness you deserve.
For maximum performance we recommend you have your new Rockford
Fosgate product installed by an Authorized Rockford Fosgate Dealer, as we
provide specialized training through Rockford Technical Training Institute
(RTTI). Please read your warranty and retain your receipt and original carton
for possible future use.
To add the finishing touch to your new Rockford Fosgate image, order your
Rockford accessories, which include everything from T-shirts and jackets to
hats and sunglasses.
To get a free brochure on Rockford Fosgate products and Rockford accessories,
please call 602-967-3565 or FAX 602-967-8132. For Canada, call Korbon
Trading at 416-567-1920. For International orders, FAX +001-1-602-9678132 or call +001-1-602-967-3565.
PRACTICE SAFE SOUND™
CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER
100dB MAY CAUSE PERMANENT HEARING LOSS. HIGH POWERED
AUTOSOUND SYSTEMS MAY PRODUCE SOUND PRESSURE LEVELS
WELL OVER 130dB. USE COMMON SENSE AND PRACTICE SAFE
SOUND.
The serial number can be found on the outside of the box. Please record it in
the space provided below as your permanent record. This will become useful
in recovering your amplifier if it is ever stolen and serve as verification of your
factory warranty.
Serial Number: ___________________
Model Number: ___________________
TABLE OF CONTENTS
Specifications ................................................................................... 1
Punch 4-Channel Accessory Pack ................................................... 3
Introduction ...................................................................................... 4
Features and Benefits ................................................................. 4
Controls and Features...................................................................... 5
Top View of Amplifier and End Caps .......................................... 5
Power/REM/LED Side ................................................................. 6
Input/Output Terminal Side ......................................................... 7
Installation Considerations ............................................................... 8
Tools Needed .............................................................................. 9
Battery and Charging ....................................................................... 9
Mounting and Location ................................................................... 10
Trunk Mounting ......................................................................... 10
Passenger Compartment Mounting .......................................... 10
Wiring the Punch ............................................................................ 10
Preparing Wires and Fuses ....................................................... 10
Wiring the Fuse Holder ............................................................. 10
Wiring the Ring and Spade Connectors .................................... 12
Power ........................................................................................ 12
Ground ...................................................................................... 13
Remote Turn-on ........................................................................ 13
Input .......................................................................................... 13
Speakers ................................................................................... 14
Bridged/Mono Configuration ..................................................... 14
Passive Crossover Impedance ................................................. 14
Table of Component Values........................................................... 16
Active Crossover Mode Selection .................................................. 17
Crossover Frequency Settings ....................................................... 17
Wiring Diagrams............................................................................. 18
Troubleshooting ............................................................................. 25
Dynamic Power Measurements ..................................................... 28
Warranty Information...................................................................... 31
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PUNCH 4040DSM PUNCH 4080DSM
SPECIFICATIONS
Dynamic Power Rating (IHF-202 Standard) - Measured at 14.4 Volts
Bridged into a 4Ω Load 115 Watts X 2 220 Watts x 2
Per channel into a 2Ω Load 55 Watts X 4 100 Watts x 4
Per channel into a 4Ω Load 35 Watts X 4 60 Watts x 4
Continuous Power Rating (IASCA Standard)
RMS continuous power per channel, all channels 20 Watts 40 Watts
driven into a 4Ω load from 20 to 20,000 Hz, with less ( @ 12.6 ( @ 13.8
than 0.05% Total Harmonic Distortion (THD) battery volts) battery volts)
RMS continuous power per channel, all channels 40 Watts 80 Wattls
driven into a 2Ω load from 20 to 20,000 Hz, with less ( @ 12.6 ( @ 13.8
than 0.1% Total Harmonic Distortion (THD) battery volts) battery volts)
RMS continuous power bridged into a 4Ω load from 80 Watts 160 Watts
20 to 20,000 Hz, with less than 0.1% Total Harmonic ( @ 12.6 ( @ 13.8
Distortion (THD) battery volts) battery volts)
Signal-to-Noise Ratio Over 100dB A-weighted
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See Appendix A - Dynamic Power Measurements for information on these specifications.
Factory Default Crossover Point 100 Hz - Selectable with optional Module Cards
1
Crossover Alignment Butterworth
via interchangeable Module Cards
for 500 mV rated source units.
Treble: +12dB Maximum at 20kHz
12-5/8" (32.0cm) L 13-5/8" (34.6cm) L
PUNCH 4040DSM PUNCH 4080DSM
2-5/8" ( 6.6cm) H 2-5/8" ( 6.6cm) H
Dimensions 9-5/8" (24.4cm) W 9-5/8" (24.4cm) W
Bandwidth 15Hz to 100kHz
Damping Factor @ 4Ω At output connector - Over 150
The above figures are factory preset and are correct
overload. Thermal switch shuts down the amplifier in case of overheating.
Frequency Response 20Hz to 20kHz ±1dB / 10Hz to 100kHz -3dB
Crossover 12dB/octave with selectable high pass, low pass and full range
Slew Factor Over 5
IM Distortion (IHF) Less than 0.05%
Input Gain Variable from 40dB to 14dB (200mV - 2 Volt)
Protection Internal analog-computer output protection circuitry limits power in case of
B+ Fuse Size 30 Amps 50 Amps
(External to Amplifier)
Fuse Type ATC AGU
Equalization Bass: +18dB Maximum at 45Hz
Input Impedance 20k ohms
Specifications subject to change without notice.
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PUNCH 4-CHANNEL ACCESSORY PACK
12' (366cm)
17' (518cm)
Red Power
Wire
1.5' (46cm) Black
Grounding Wire
Blue Remote
Turn-on Wire
Remote Turn-on Wire
Connector Plug
Fuse Holder 4080
Punch
Owner's
Manual
Power Ring
Terminals
Allen Head Set Screws
and Mounting Screws
Fuse Holder 4040
Punch
Verification
Certificate
3
INTRODUCTION
This manual provides information on the features, installation, 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 Rockford 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 beginning.
Features
and
Benefits
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 aerospace and industrial applications, this technology is also
highly advantageous in the hostile automotive environment.
Low Level Input Senstivity. The Punch 4-channel adjustable 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 compensate 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 modules allow for various configuration possibilities.
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Real Time Power Protection (R.T.P.P.) allows for the
greatest power output under all load conditions. When
output reaches an unsafe level it will be reduced, unlike
current limiting which often causes premature protection
or failure to protect at all.
To get a better understanding of the Punch let’s take a
closer look.
CONTROLS AND FEA TURES
This section describes the various controls and features of
the Punch 4040 DSM and 4080 DSM amplifiers.
Top View of Amplifier and End Caps
Punch
4-Channel
Housing
End Caps
The cast aluminum heatsink of the Punch 4-Channel is
designed for high performance cooling. The raised design
of the housing allows cables and wires to run underneath
the unit. This provides for greater wiring flexibility and
protects the cables from damage caused by excessive
heat and bending.
Interchangeable end caps conceal the wiring and input
cables, giving the amplifier a clean, "stealth" look. Also
incorporated, is a holding dimple built into the end cap.
This small feature enables the cap to be held in place while
being mounted.
The end caps are secured to the housing with flush
mounting, captive screws.
5
Mounting
Screws
Four (4) custom, round, hex screws included in the accessory pack hold the unit in place. These screws are covered
when the end caps are installed.
Power/REM/LED Side
REM
Connector
LED Power
Indicator
B+/GND
Power
Connector
Speaker
Ouptut
Terminals
Rear Speaker
Output Terminals
LED
Indicator
Front Speaker
Output Terminals
B+/GND
Power Connectors
REM
Connector
The Punch 4-Channel is turned on by connecting the blue
remote turn-on wire to the source unit’s “Accessory” or
“Auto Antenna” lead, either of which will go to +12 volts
when the source unit is turned on.
The LED illuminates when the unit is activated.
These connectors are used to supply power and ground
to the amplifier and accept 12 gauge - 8 gauge wire.*
These gold-plated terminal blocks connect the Right/Left
Front and Right/Left Rear channel outputs to the speakers and accept wire sizes from 8 gauge through 18 gauge.
Gold-plated connectors are immune to corrosion that can
cause signal deterioration.
*Rockford Fosgate's Perfect Interface line of accessories includes high quality power and speaker wire, gold plated RCA
interconnecting cable and other products to complete your
installation. Ask your Authorized Rockford Fosgate Dealer about
Perfect Interface.
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Front Treble
Adjustment
Control
Front Input
Gain
Control
Input/Output Terminal Side
Front Bass
Adjustment
Control
Rear Treble
Adjustment
Control
Rear Input
Gain
Control
Rear Bass
Adjustment
Control
Front Input
Connectors
Front/Rear
Input Switch
0/180° Rear
Phase
Selector
Switch
Treble/Bass
Input Gain
Controls
Front+Rear
Summed Pass-Thru
Connectors
Rear Input
Connectors
0/180° Rear
Phase Selector
Switch
Front/Rear
Input Switch
This switch allows you to use the front input to drive both
Front and Rear channels. Switching to Rear position
allows you to run separate Front and Rear inputs. This
eliminates the need for a "Y-adapter" when using the
amplifier in a bi-amplified or 4-Channel mode.
This switch enables you to easily invert the phase of the
Rear channels on the amplifier without having to disconnect the speaker wires. See the wiring diagram on page
17 for use.
These controls adjust the amount of treble and bass
response desired. To increase the amount of response,
turn the controls clockwise; to decrease, turn the controls
counterclockwise. Note that there are separate Bass and
Treble controls for Front and Rear channels.
These controls are factory preset to 500 millivolts to
match most head units and are variable from 100 millivolts
to two volts. (
adjusting.
More than likely they will not need
)
If just a little volume from the source unit drives the
amplifier into distortion, reduce the input gain controls so
that the distortion doesn’t start until the source volume is
at about 3/4 of its rotation. Note that there are separate
Front and Rear gain controls.
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Input
Connectors
The amplifier’s signal input, female, RCA jacks should be
connected to the source unit’s signal outputs with highquality RCA cables. The connectors have been plated in
gold to eliminate the possibility of corrosion that can cause
signal deterioration.
Front & Rear
Summed
Pass-Thru
Connectors
These pass-thru connectors allow you to daisy-chain an
additional Punch amplifier without running an additional
set of RCA cables from the front of the vehicle to the rear
amplifier location. The crossover module in the Pass-Thru
RCA circuit allows the daisy-chained amplifier to be configured independently of the Front and Rear channels for
low pass, high pass or full range operation.
The Pass-Thru signal is derived by summing the Front Left
and Rear Left inputs to create the Left output, and summing the Front Right and Rear Right input to create the
Right output. This provides constant output regardless of
the source unit fade position.
INSTALLATION CONSIDERATIONS
This section focuses on some of the vehicle considerations for installing your new Punch 4-Channel amplifier.
Checking your battery and current sound system, as well
as pre-planning your system layout and best wiring routes
will save installation time. When deciding how to lay out
your new system, be sure that each component will be
easily accessible for making adjustments.
Before beginning any installation, be sure to follow these
simple rules:
1. Carefully read and understand the instructions before
attempting to install the amplifier.
2. For easier assembly, we suggest you run all wires
prior to mounting your amplifier in place.
3. Use only quality connectors for making connections.
See your Authorized Rockford Fosgate Dealer for
Perfect Interface wire enhancements.
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