Rockford Fosgate Stereo Amplifier 4 CHANNEL AMPLIFIER User Guide

DSM  
4-CHANNEL AMPLIFIER  
O W N ER' S MAN UAL  
®
®
 
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  
 
1
 
2
 
PUNCH 4-CHANNEL ACCESSORY PACK  
12' (366cm)  
Blue Remote  
Turn-on Wire  
17' (518cm)  
Red Power  
Wire  
1.5' (46cm) Black  
Grounding Wire  
Power Ring  
Terminals  
Remote Turn-on Wire  
Connector Plug  
Allen Head Set Screws  
and Mounting Screws  
Fuse Holder 4080  
Fuse Holder 4040  
Punch  
Owner's  
Manual  
Punch  
Verification  
Certificate  
3
 
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.  
WestronglyrecommendyouhaveyourAuthorizedRock-  
ford Fosgate Dealer install your new Punch 4-channel  
amplifier. Ifyoudochoosetoinstalltheamplifieryourself,  
please be sure to read the entire manual before begin-  
ning.  
Features  
and  
Benefits  
TheRockfordFosgate4-Channelautomotivestereopower  
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.  
4
 
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 lets take a  
closer look.  
CONTROLS AND FEATURES  
Thissectiondescribesthevariouscontrolsandfeaturesof  
the Punch 4040 DSM and 4080 DSM amplifiers.  
Top View of Amplifier and End Caps  
Punch The cast aluminum heatsink of the Punch 4-Channel is  
4-Channel  
Housing  
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.  
End Caps 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.  
Thissmallfeatureenablesthecaptobeheldinplacewhile  
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 acces-  
sorypackholdtheunitinplace. Thesescrewsarecovered  
when the end caps are installed.  
Power/REM/LED Side  
LED  
B+/GND  
Indicator  
Power Connectors  
Front Speaker  
REM  
Rear Speaker  
Output Terminals  
Connector  
Output Terminals  
The Punch 4-Channel is turned on by connecting the blue  
remote turn-on wire to the source units Accessoryor  
Auto Antennalead, either of which will go to +12 volts  
when the source unit is turned on.  
REM  
Connector  
LED Power  
Indicator  
The LED illuminates when the unit is activated.  
B+/GND  
Power  
Connector  
These connectors are used to supply power and ground  
to the amplifier and accept 12 gauge - 8 gauge wire.*  
Speaker These gold-plated terminal blocks connect the Right/Left  
Ouptut  
Terminals  
Front and Right/Left Rear channel outputs to the speak-  
ersandacceptwiresizesfrom8gaugethrough18gauge.  
Gold-plated connectors are immune to corrosion that can  
cause signal deterioration.  
*Rockford Fosgate's Perfect Interface line of accessories in-  
cludes high quality power and speaker wire, gold plated RCA  
interconnecting cable and other products to complete your  
installation.AskyourAuthorizedRockfordFosgateDealerabout  
Perfect Interface.  
6
 
Input/Output Terminal Side  
Front Treble  
Adjustment  
Control  
Rear Input  
Gain  
Control  
Front Input  
Gain  
Control  
Front Bass  
Adjustment  
Control  
Rear Treble  
Adjustment  
Control  
Rear Bass  
Adjustment  
Control  
Front Input  
Connectors  
Rear Input  
Connectors Phase Selector  
Switch  
0/180° Rear  
Front+Rear  
Summed Pass-Thru  
Connectors  
Front/Rear  
Input Switch  
Front/Rear This switch allows you to use the front input to drive both  
Input Switch  
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.  
0/180° Rear This switch enables you to easily invert the phase of the  
Phase  
Selector  
Switch  
Rear channels on the amplifier without having to discon-  
nect 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.  
Treble/Bass  
These controls are factory preset to 500 millivolts to  
matchmostheadunitsandarevariablefrom100millivolts  
to two volts. (More than likely they will not need  
adjusting.)  
Input Gain  
Controls  
If just a little volume from the source unit drives the  
amplifier into distortion, reduce the input gain controls so  
that the distortion doesnt start until the source volume is  
at about 3/4 of its rotation. Note that there are separate  
Front and Rear gain controls.  
7
 
Input  
Connectors  
The amplifiers signal input, female, RCA jacks should be  
connected to the source units signal outputs with high-  
quality RCA cables. The connectors have been plated in  
goldtoeliminatethepossibilityofcorrosionthatcancause  
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  
amplifierlocation. ThecrossovermoduleinthePass-Thru  
RCA circuit allows the daisy-chained amplifier to be con-  
figured independently of the Front and Rear channels for  
low pass, high pass or full range operation.  
ThePass-ThrusignalisderivedbysummingtheFrontLeft  
and Rear Left inputs to create the Left output, and sum-  
ming 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 consider-  
ations 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.  
8
 
4. Think before you drill! Be careful not to cut or drill  
into gas tanks, fuel lines, brake or hydraulic lines,  
vacuum lines or electrical wiring when working on  
any vehicle.  
5. Forsafety,disconnectthebatterygroundcableprior  
to beginning the installation process.  
6. Neverrunwiresunderneaththevehicle. Thecleanest,  
safest wiring connections are made by running the  
wire under the carpet or behind the side panels.  
Never leave wires exposed.  
7. Avoid running wires over or through sharp edges.  
Use grommets to protect wires routed through holes  
in metal.  
8. ALWAYS protect the battery and electrical system  
fromshortswithproperfusing.Afuseholderandfuse  
must be installed within 18(46cm) of the battery  
terminal to safeguard from possible damage or in-  
jury.  
9. Grounding connections should be as short as pos-  
sible and always be connected to metal that is  
welded to the main body, or chassis, of the vehicle.  
Tools  
Needed  
The following is a list of tools you will need for installing  
the Punch amplifier:  
7/64" & 3/32" Allen Wrenches (included)  
Wire Strippers  
Battery Post Wrench  
Wire Cutters  
Voltmeter  
Electric Hand Drill with assorted bits Wire Crimpers  
BATTERY AND CHARGING  
Punch amplifiers will naturally put an extra load on your  
battery and charging system. We recommend you check  
your alternator capacity to ensure ample charging capa-  
bility to handle the additional load of your new Punch  
equipment. Stock electrical systems in good condition  
should typically handle the extra load of any individual  
Punch unit without problems. If problems arise, we sug-  
gestyoufirstcheckthechargingsystem,thenuseaheavy  
duty battery and/or a high output alternator as needed.  
9
 
MOUNTING AND LOCATION  
The mounting location and position of the Punch 4-  
Channel will have a great effect on its ability to dissipate  
the heat generated in normal operation. The Punch 4-  
Channel has a heatsink designed for heat dissipation  
and internal shutoff circuitry to avoid overheating. It is  
reasonably tolerant of mounting variations. However,  
care should be taken to ensure adequate ventilation.  
Trunk  
Mounting  
Thetemperatureinsideatrunkcanreachashighas175°  
F (80° C) during the summer months. Since the thermal  
shutoff point for the Punch 4-Channel is 195° F (90° C),  
it is easy to see that the amp must be mounted for  
maximum cooling capability. Mounting the amplifier on  
the floor or under the rear parcel tray prevents sufficient  
convectional air flow cooling. Mounting the unit vertically  
on a surface with the fin grooves running up and down  
usually results in the best cooling.  
Passenger  
Compartment  
Mounting  
Undertheseatorfloormountingwillworkaslongasthere  
is a minimum of 1(2.5cm) of air gap above the amplifer's  
heatsink.  
Vertical mounting of the amplifier is still the best.  
WIRING THE PUNCH  
Caution! Be sure to avoid running the power wires  
nearthelowlevelinputcables,antenna,powerleads,  
sensitive equipment or harnesses. The power wires  
carry substantial currents and could induce noise.  
Preparing  
Wires and  
Fuses  
The following instructions explain how to prepare the  
wires, connectors and fusing. We suggest you perform  
these procedures prior to wiring and mounting your new  
Punch 4-Channel amplifier.  
Wiring the  
Fuse Holder  
1. Use approximately 18" (46cm) of the red power wire.  
Strip one end of the wire back 1/2(1.3cm) as shown  
in the following diagram:  
>
>
1/2"  
(1.3cm)  
10  
 
2. For the Punch 4040, place the protective boot onto  
thewire.Insertthewireintooneendofthefuseholder  
so that the insulation is just inside the crimp area as  
showninthediagram. Crimpthewireinplacewiththe  
notched portion of a crimping tool. Cover the crimped  
area with the protective boot that is supplied with the  
fuse holder.  
Crimp Here  
Fuse Holder  
Protective Boot  
3. For the Punch 4080, place the protective boot onto  
the wire. Slide the wire into the wire sleeve. Making  
sure the screw holes on the wire sleeve and fuse  
holder align, insert the prepared wire sleeve into the  
smaller end of the fuse connector. Tighten the wire in  
place with the enclosed allen screw. Screw the pro-  
tective boot onto the fuse holder.  
wire  
fuse connector  
wire  
wire sleeve  
4. Repeat the above steps to connect the remainder of  
the red power wire to the other side of the fuse holder  
and route to the amplifier mounting location.  
11  
 
Wiring the 1. Strip back approximately 3/8" (1cm) of insulation.  
Ring and  
Spade  
Connectors  
3/8"  
(1cm)  
2. Insert the bare wire into the connector and crimp in  
place as shown in the following diagram:  
This connector is used for  
Crimp Here  
the Red Power wire and  
Black Ground wire.  
Wire w/insulation  
Bare  
Wire  
Connectors  
This connector is for the  
Blue Remote Turn-On wire.  
Crimp Here  
The gold B+ terminal on the amplifier must be connected  
directly to the positive (+) terminal of the battery with an  
appropriate size fuse. (See the Specifications Table for  
more information.) This provides a power source with a  
low voltage drop and low noise. Be sure to use the  
supplied fuse and fuse holder within 18" (46cm) of  
the batterys positive terminal. Failure to do so may  
cause damage to the vehicle and the amplifier.  
Power  
If the power wire must be extended beyond 17' (518cm),  
we recommend you use 8 gauge, or heavier, stranded  
wire.  
If using a larger gauge wire than that supplied with your  
new Punch 4-Channel, cut the wire casing on the diago-  
nal as shown in the following diagram. Insert the wire into  
the connector. Twist the wire around so that the long end  
oftheinsulationfacesup.Bendthewirepriortotightening  
in place. This will make it easier for attaching the end cap  
to the amplifier.  
Using Larger  
Gauge Wire  
Note: For easier assembly, only 5/8" (1.6cm) of wire  
should be bare.  
12  
 
INSULATION  
STRIP WIRE  
>
>
<
>
5/8"  
AMP  
>
Ground  
The GND terminal grounds the amplifier and is con-  
nected to the chassis of the vehicle with 12 gauge, or  
heavier, strandedwire. Whengrounding, scrapepaintoff  
metal to ensure a good, clean ground connection. To  
prevent ground loops, we recommend you refrain from  
extending the ground wire beyond 18" (46cm) in any  
installation.  
Remote  
Turn-on  
ThePunch4-Channelamplifiersareturnedonbysupply-  
ing positive (+) 12 volts to the REM terminal. Usually the  
terminal is connected to the source units Accessoryor  
Auto Antennalead, either of which will go to +12 Volts  
when the source unit is turned on.  
Although the majority of high-quality automotive source  
units have an Accessory or Antenna output, there are  
many which require different turn-on methods. If the  
source unit has no Auto Antenna lead (or if the Auto  
Antenna goes down during tape operation), we recom-  
mend a switch in the car with one terminal connected to  
+12 volts and the other to the Punch 4-Channel REM  
lead.Thiswillallowyoutoengagetheamplifiermanually.  
Input The amplifiers signal input RCA jacks should be con-  
nected to the source units signal outputs with high-  
quality braided or double-shielded interconnecting RCA  
cables.  
Note: Be sure to route the Punch 4-Channel signal  
input cable away from the main power wire and the  
cars wiring harnesses to avoid noise coupling.  
13  
 
Speakers  
Punch 4-Channel amplifiers are rated for safe operation  
into loads of 2, or greater in stereo mode or 4in  
bridged/mono configurations. The primary loads on any  
amplifier come from directly connected speakers without  
usingcapacitors. Themeasuredresistanceforeachside  
should not be less than 2stereo or 4bridged/mono.  
Bridged/Mono The Punch 4-Channel amplifiers are capable of bridged/  
Configuration  
mono configurations.  
This configuration enables you to:  
Run amplifier as a separate 2 channel subwoofer or  
satellite amplifier.  
Create a high power stereo system  
Run 2 channels with a bridged mono woofer and the  
other 2 as a high-frequency stereo amp, etc.  
Note: Both Punch 4-Channel amplifiers allow the  
above 3 configurations all in one.  
For more information refer to the wiring diagrams begin-  
ning on page 18.  
Note: To bridge the amplifier use the L+ and R–  
speaker connectors.  
Caution! Punch 4-Channel amplifiers are not recom-  
mended for impedance loads below 2stereo or 4Ω  
bridged/mono.  
Be sure to observe proper speaker terminal polarity  
throughout the system. It is critical for the Punch 4-  
Channel to use the correct negative terminals for  
right and left channels, since the RIGHT NEGATIVE  
()terminalisthehotterminalfortherightspeaker.  
DO NOT chassis ground any of the speaker leads as  
unstable operation may result.  
A passive crossover is a circuit that employs capacitors  
and/or coils and is placed on speaker leads between the  
amplifier and speaker to delegate frequencies in the  
speakers optimum performance range.  
Passive  
Crossover  
Impedance  
14  
 
The most commonly used filter networks are 6 dB per  
octave systems. These are easy to construct and require  
a minimum number of parts. A filter network can perform  
one of three functions. These are highpass (capacitors),  
lowpass (inductors, chokes or coils) and bandpass (com-  
bination of a capacitor and a coil).  
The result, limiting the types of frequency to the speaker,  
is directly dependent upon the speakers impedance and  
component values.  
The most common filters used in speaker crossovers, as  
stated above, are 6 dB per octave which use one compo-  
nentperfilter. Placingthisfilterinserieswiththecircuitwill  
reduce power to the speaker by 6 dB per octave above or  
below the crossover point depending on whether it is a  
High Pass or Low Pass filter. When passive crossover  
components are used in multiple speaker systems, the  
crossoversystem'seffectontheoverallimpedanceshould  
be taken into consideration along with the speaker's  
impedance when determining amplifier loads.  
More complex systems such as 12 dB or 18 dB per octave  
can cause impedance problems if not professionally de-  
signed. If such a system is required, we recommend  
consulting an Authorized Rockford Fosgate Dealer.  
15  
 
Table of Component Values  
C
L
6 dB/Octave Low Pass  
6 dB/Octave High Pass  
Freq.  
Hertz  
Speaker Impedance  
2 OHMS  
8 OHMS  
4 OHMS  
L
C
L
C
L
C
80  
100  
130  
4.1mH  
3.1mH  
2.4mH  
1000µF  
800µF  
600µF  
8.2mH  
6.2mH  
4.7mH  
500µF  
400µF  
300µF  
16mH  
12mH  
10mH  
250µF  
200µF  
150µF  
200  
260  
400  
1.6mH  
1.2mH  
.8mH  
400µF  
300µF  
200µF  
3.3mH  
2.4mH  
1.6mH  
200µF  
150µF  
100µF  
6.8mH  
4.7mH  
3.3mH  
100µF  
75µF  
50µF  
600  
800  
1000  
.5mH  
.41mH  
.31mH  
136µF  
100µF  
78µF  
1.0mH  
.82mH  
.62mH  
68µF  
50µF  
39µF  
2.0mH  
1.6mH  
1.2mH  
33µF  
26µF  
20µF  
1200  
1800  
4000  
.25mH  
.16mH  
.08mH  
66µF  
44µF  
20µF  
.51mH  
.33mH  
.16mH  
33µF  
22µF  
10µF  
1.0mH  
.68mH  
.33mH  
16µF  
10µF  
5µF  
6000  
9000  
12000  
51µH  
34µH  
25µH  
14µF  
9.5µF  
6.6µF  
.10mH  
68µH  
51µH  
6.8µF  
4.7µF  
3.3µF  
.20mH  
.15mH  
100µH  
3.3µF  
2.2µF  
1.6µF  
6 dB/Octave High and Low Pass Filters  
L = Low Pass (Inductor)  
C = High Pass (Capacitor)  
For more information, see your Authorized Rockford Fosgate Dealer.  
16  
 
Active  
Crossover  
Mode  
The Punch 4-Channel amplifiers feature selectable elec-  
tronic crossovers. Selection is made by positioning of a  
removable module card. These modules control the  
output channels and can be configured in a High Pass,  
Low Pass or Full Range (factory default) position. The 4-  
Channel amplifiers are shipped with 100Hz 12dB per  
octave Butterworth aligned crossover modules. Addi-  
tional crossover frequency modules are available from  
your Authorized Rockford Fosgate Dealer.  
Selection  
L P  
HP  
Note: The factory default is Full Range.  
Crossover  
Frequency  
Settings  
To change the crossover mode, remove the crossover  
module from the housing. Rotate the module to the  
desired setting and gently push the module back into the  
amplifier housing as shown on the diagram on the back  
of the amplifier.  
NOTE: All of the crossover cards in this amplifier have been  
factory installed in the FULL RANGE configuration.  
They can be reconfigured to produce a 100Hz LOW  
PASS or HIGH PASS according to the following  
instructions.  
REAR  
SPEAKERS  
CROSSOVER CARD INSTALLATION:  
Use a small screwdriver to pry out the plastic hole  
covers. Orient the card in the FULL RANGE, LOW  
PASS, or HIGH PASS configuration as shown below,  
then insert the card fully into the connector.  
FULL RANGE  
LOW PASS  
HIGH PASS  
H P  
LP  
L P  
FULL  
HP  
FRONT  
SPEAKERS  
FRONT+REAR SUM OUTPUT:  
FRONT+REAR  
SUM OUTPUT  
The center pair of RCA jacks provide a  
FRONT+REAR summed output signal, with a  
crossover that operates independently of the FRONT  
SPEAKER and REAR SPEAKER crossovers.  
Example: The 4040 DSM is shipped with three 100 Hz  
modules. With the modules in the Full Range setting, the  
amplifier will pass through all 20Hz -20kHz frequencies.  
In the Low Pass setting, only those frequencies below  
100 Hz will pass through the amplifier.  
In the High Pass setting, only those above 100 Hz will  
pass through the amplifier.  
17  
 
SAMPLE WIRING DIAGRAMS  
SOURCE UNIT  
IN  
OUT  
IN  
R
L
R
L
0
180  
PHASE  
R
F
TREBLE GAIN BASS  
FRONT  
TREBLE GAIN BASS  
REAR  
INPUT  
FRONT  
FRNT+REAR REAR  
Input switch set to F  
Front crossover set to 100 Hz High Pass  
Rear crossover set to 100 Hz Low Pass  
Front+Rear summed output not used  
Phase switch set to 0°  
*
REM  
B+  
GND  
REAR  
(bridge)  
FRONT  
(bridge)  
+
L E F T  
+ R I G H T –  
+
L E F T –  
+ R I G H T –  
+
4Woofer  
+
+
4 Ohm (2min.) 4 Ohm (2min.)  
Mid Range/  
Tweeter  
Mid Range/  
Tweeter  
BRIDGED MONO/BI-AMPLIFIED  
*
Always start with the phase switch on 0°, then switch to 180° and listen.  
Select the position that provides the best frequency response.  
18  
 
SOURCE UNIT  
Left  
Right  
IN  
OUT  
IN  
R
L
R
L
0
180  
PHASE  
R
F
TREBLE GAIN BASS  
FRONT  
TREBLE GAIN BASS  
REAR  
INPUT  
FRONT  
FRNT+REAR REAR  
Input switch set to R  
Set Front & Rear crossover to the same point  
Front+Rear summed output not used  
Phase switch set to 0°  
*
REM  
B+  
GND  
REAR  
(bridge)  
FRONT  
(bridge)  
+
L E F T  
+ R I G H T –  
+
L E F T –  
+ R I G H T –  
+
+
4  
4Ω  
Right  
Left  
2-CHANNEL BRIDGED STEREO  
* In this mode the phase switch should always be at 0°. Switching to the 180°  
position will result in an "out of phase" condition and a loss of output.  
(Alternate Version: 100Hz High Pass Front & Rear -4Full Range)  
19  
 
SOURCE UNIT  
IN  
OUT  
IN  
R
L
R
L
0
180  
PHASE  
R
F
TREBLE GAIN BASS  
FRONT  
TREBLE GAIN BASS  
REAR  
INPUT  
FRONT  
FRNT+REAR REAR  
Input switch set to F  
Set Front & Rear crossover to the same point  
Front+Rear summed output not used  
Phase switch set to 180°  
*
REM  
B+  
GND  
REAR  
(bridge)  
FRONT  
(bridge)  
+
L E F T –  
+ R I G H T –  
+
L E F T –  
+ R I G H T –  
Left  
Right  
+
+
4Ω  
4Ω  
Subwoofer  
Subwoofer  
2-CHANNEL BRIDGED STEREO  
*
In this mode the phase switch should always be at 180°. Switching to the 0°  
position will result in an "out of phase" condition and a loss of output.  
(Alternate Version: 100Hz High Pass Front & Rear -4Full Range)  
20  
 
SOURCE UNIT  
IN  
OUT  
IN  
R
L
R
L
0
180  
PHASE  
R
F
TREBLE GAIN BASS  
FRONT  
TREBLE GAIN BASS  
REAR  
INPUT  
FRONT  
FRNT+REAR REAR  
Input switch set to F  
Front crossover set to 100 Hz High Pass  
Rear crossover set to 100 Hz Low Pass  
Front+Rear summed output not used  
Phase switch set to 0°  
*
REM  
B+  
GND  
REAR  
(bridge)  
FRONT  
(bridge)  
+
L E F T  
+ R I G H T –  
+
L E F T –  
+ R I G H T –  
+
+
4 Ohm (2min.) 4 Ohm (2min.)  
Mid Range/  
Tweeter  
Mid Range/  
Tweeter  
+
+
Subwoofer  
Subwoofer  
BI-AMPLIFIED STEREO  
*
Always start with the phase switch on 0°, then switch to 180° and listen.  
Select the position that provides the best frequency response.  
21  
 
SOURCE UNIT  
IN  
OUT  
IN  
R
L
R
L
0
180  
PHASE  
R
F
TREBLE GAIN BASS  
FRONT  
TREBLE GAIN BASS  
REAR  
INPUT  
FRONT  
FRNT+REAR REAR  
Input switch set to Rear  
Front crossover set to Full Range  
Rear crossover set to Full Range  
Front+Rear summed output not used  
Phase switch set to 0°  
REM  
B+  
GND  
REAR  
(bridge)  
FRONT  
(bridge)  
+
L E F T  
+ R I G H T –  
+
L E F T –  
+RIGHT–  
+
+
+
+
Full Range  
Full Range  
4(2min.)  
Mid Range/  
Tweeter  
4(2min.)  
Mid Range/  
Tweeter  
+
4Ω  
Subwoofer  
4-CHANNEL WITH BRIDGED SUBWOOFER  
Allows front to rear fading  
Sub-woofer is optional  
Sub-woofer can be bridged on front or rear or both  
22  
 
SOURCE UNIT  
IN  
OUT  
IN  
R
L
R
L
0
180  
PHASE  
R
F
TREBLE GAIN BASS  
FRONT  
TREBLE GAIN BASS  
REAR  
INPUT  
FRONT  
FRNT+REAR REAR  
Input switch set to Rear  
Front crossover set to Full Range  
Rear crossover set to Full Range  
Front+Rear crossover set to 100Hz Low Pass  
Phase switch set to 0°  
REM  
B+  
GND  
REAR  
(bridge)  
FRONT  
(bridge)  
+
L E F T  
+ R I G H T –  
+
L E F T –  
+RIGHT–  
+
+
+
+
Full Range  
Full Range  
Full Range  
Full Range  
L
R
L
R
+
Subwoofer  
4-CHANNEL WITH SUBWOOFER AMP  
23  
 
SOURCE UNIT  
IN  
OUT  
IN  
R
L
R
L
0
180  
PHASE  
R
F
TREBLE GAIN BASS  
FRONT  
TREBLE GAIN BASS  
REAR  
INPUT  
FRONT  
FRNT+REAR REAR  
Input switch set to F  
Set Front & Rear crossovers to the same point  
Front+Rear summed output not used  
Phase switch set to 0°  
*
REM  
B+  
GND  
REAR  
(bridge)  
FRONT  
(bridge)  
+
L E F T  
+ R I G H T –  
+
L E F T –  
+ R I G H T –  
+
+
4Woofer  
4Woofer  
BRIDGED MONO  
24  
 
TROUBLESHOOTING  
Problem  
Amplifier will not play Remote turn-on light is off.  
Solution  
1. Check the DC voltage at the amplifier's B+ terminal  
with a voltmeter. The voltage should measure be-  
tween 11.5V - 15.5V.  
If voltage is not found, check the battery, fuse, fuse  
housing and wire connections. Fix, repair, or replace  
accordingly.  
2. If the amplifier still does not play, check the voltage at  
theamplifier'sremoteturn-onlead.Thevoltageshould  
measure between 11V - 15V.  
a. If voltage is above or below the prescribed mea-  
surements, have the head unit checked by an  
Authorized Dealer or Service Center.  
b. If the remote turn-on current draw from the head  
unit is connected to multiple amps and/or electron-  
ics, the current draw may be too great. Check for  
proper connections. (Use a relay to suppress the  
excessive current draw.)  
Ifyouarestillhavingproblems,havetheamplifierchecked  
by an Authorized Rockford Fosgate Dealer.  
Problem  
Amplifier will not play Remote turn-on light is on:  
Solution  
1. Unplug the head unit and test the amplifier with an-  
other working source unit (i.e., bench-test radio,  
walkman, etc.) If the amplifier plays, check the in-dash  
leads for cuts, breaks and/or shorts.  
2. If the amplifier still does not play, disconnect the  
existing speakers and connect a set of test speakers  
to the output of the amplifier (any type of speaker will  
do-i.e.,simplehomeboxtype,bookshelf,rawspeaker,  
etc.). If the amp plays, check for shorts or blown voice  
coils in the vehicle's speaker system.  
Ifyouarestillhavingproblems,havetheamplifierchecked  
out by an Authorized Rockford Fosgate Dealer.  
25  
 
Problem  
Amplifier gets too hot.  
Solution  
1. Be sure the amplifier is properly mounted. You should  
be able to place your hand a few inches above the  
amplifierhousingandfeeltheheatrisingwhentheunit  
is on.  
Hot air rises, consequently, mount the amplifier with  
the heatsink fins aligned vertically. This allows the air  
to flow freely, carrying away the heat. Check to see  
that the heatsink fins are free of any obstruction (i.e.,  
carpet, seats, etc.).  
2. If #1 does not solve the problem, check to see that the  
impedance of the overall system is not less than 2as  
described on page 14. Using an AC impedance meter  
(Perfect Interface IM-1), sweep from 20 Hz - 20 kHz,  
and look for dips below the 2rating.  
Be sure to test the bass region (20 Hz - 150 Hz) of your  
system. If the amplifier is bridged to those speakers,  
the load the amp sees is one-half (1/2) of the reading  
on the AC impedance meter.  
If the impedance level is below 2, check for bad  
speakers and/or crossovers, proper use of passive  
crossovers, or try rewiring the entire system.  
Problem  
Amplifier Noise (Turn-On Pop)  
Solution  
1. Disconnect the RCA plugs from the amplifier and  
recheck the amp by turning the unit on and off. If turn-  
on pop goes away, connect a delay turn-on module  
(Perfect Interface DT-1) to the amplifier. (See your  
Authorized Rockford Fosgate Dealer for more infor-  
mation.)  
2. If the noise persists, disconnect the turn-on wire from  
theheadunitanduseadifferent+12voltpowersource  
to turn on the amplifier (i.e., battery direct). If the noise  
is gone, use a relay to switch +12 volts auto power  
from the clean power source.  
26  
 
Problem  
Engine Noise (Whine)  
Solution  
1. Disconnect the speakers from the amplifier. Connect  
a test speaker to the amplifier output terminals. If the  
noisegoesaway, checkyourspeakerleads, speakers  
and crossovers.  
2. If the noise persists, use a "shorting plug" to mute the  
input signal at the amplifier. If the noise goes away:  
a. Bypass all of the other equipment (i.e., crossovers  
and equalizers) and connect the head unit directly  
to the amp. If the noise disappears, reconnect the  
equipment, being sure to test for noise after each  
install. Logic indicates that the last unit installed is  
the culprit. Refer to the unit's owner's manual for  
more information.  
b. If the noise persists, connect a new RCA line from  
the head unit to the amplifier. If there is no noise,  
replace the RCA cable.  
c. If the noise is still present after replacing the RCA  
cable, run the RCA cable on a different route.  
d. Isolate the grounds in your head unit so there is  
only one grounding point. If the noise disappears,  
installtheradio, usingonlyone(1)groundingpoint.  
Isolate the radio chassis from the grounding on the  
dash, and use an antenna grounding loop isolator  
on the antenna.  
If noise still persists, see your Authorized Rockford  
Fosgate Dealer.  
27  
 
DYNAMIC POWER MEASUREMENTS  
About the Dynamic Power Measurements  
The Audio Graph PowerCube is a test instrument used to  
measure the output of an amplifier in accordance with  
IHF-202 industry standards. The IHF-202 standard is a  
Dynamic power measurement and was developed as a  
means of measuring power in a manner that best repre-  
sents the Real World operation of an amplifier. Many  
manufacturers, including Rockford Fosgate, at times will  
measure amplifier power into a fixed resistor (4 ohm, 2  
ohm). While this method is useful in some types of  
evaluation and testing, it is not representative of an  
amplifier that is connected up to a speaker and playing  
music.  
Music  
Music is dynamic; the sound waves are complex and  
constantlychanging.Inordertosimulatethis,theIHF-202  
standard calls for the input signal to the amplifier to be a  
1kHz bursted tone. This signal is input (on) for a short  
periodoftimeandthenoffforarestedperiod. Thesignal  
is gradually increased in level until the amplifier's output  
exceeds 1% Total Harmonic Distortion (THD). At 1%  
distortion becomes audible, therefore, any power pro-  
duced above that level is considered unusable. Many  
manufacturers represent their amplifiers' output power in  
excess of 10% distortion. They use many names for this  
measurement, such as Total Maximum Power or Maxi-  
mum Output Power. This is not indicative of the actual  
usable output power.  
Listening to Loudspeakers - Not Resistors  
A loudspeaker is not a resistor. A resistor's value (resis-  
tance measured in ohms) is fixed. A loudspeaker's im-  
pedance is dynamic. It is constantly changing in value,  
dependent upon the frequency of the input signal. There-  
fore, measuring power with the amplifier loaded into a 4  
ohm resistor is not the same as measuring power with the  
amplifier connected to a 4 ohm speaker. Most people do  
not listen to music through a resistor.  
Appendix A  
28  
 
A4ohmspeakermayexperienceadropinimpedance4-  
6 times lower than its nominal (printed) impedance. A  
speaker will also create phase shifts in the signal that is  
passed through it. These phase shifts happen because  
a speaker is an inductor (voice coil) and a capacitor  
(compliance of the surround/spider), as well as a resistor  
(voice coil wire).  
To simulate a speaker the Audio Graph PowerCube  
measures output power into 20 different loads. It tests at  
8 ohms, 4 ohms, 2 ohms and 1 ohm. Each of these  
impedances is also tested at 60°, 30°, 0°, +30° and  
+60° phase angles. These different impedances and  
phase angles represent the shifts in impedance and  
phase that can occur in a typical loudspeaker.  
Information Cubed  
Thedataacquiredinthetestingprocedureisthengraphed  
in the form of a 3-dimensional cube, hence the name  
PowerCube.  
The Phase Angle is expressed on the horizontal axis, the  
Output Voltage is presented on the vertical axis and the  
Impedance is displayed on the Z axis. Output Power, in  
watts, is listed on the left hand side for each impedance  
at each phase angle.  
Audio Graph The PowerCube  
MODEL BEING  
TESTED  
VOLTAGE FROM  
BATTERY  
x4 = STEREO  
MONO = BRIDGED MONO*  
MANUFACTURERS  
RATED OUTPUT  
Amplifier: PUNCH 4040 14.4V x 4  
Serial No: B1AB13A000016  
Rated Power : 20W at 4 Ohms  
Owner : ROCKFORD CORPORATION  
860° 20 W  
*
OUTPUT VOLTAGE  
AT THE RAILS  
(MOSFETS)  
30° 20 W  
POWER  
IN  
100V  
60V  
0° 19 W  
30° 20 W  
WATTS  
{
60° 20 W  
460° 38 W  
*
30° 35 W  
0° 35 W  
30° 36 W  
60° 38 W  
20V  
260° 66 W  
*
30° 60 W  
0° 58 W  
8Ω  
4Ω  
30° 60 W  
2Ω  
60° (Cap)  
60° 64 W  
0°  
1Ω  
(Ind) +60°  
160° 100 W  
*
{
{
30° 87 W  
Impedance  
PHASE ANGLES  
"MOTION OF  
SPEAKER"  
0° 84 W  
30° 87 W  
60° 100 W  
*If a Bridged/Mono, test amplifier sees 1/2 impedance (2test amp sees 1)  
29  
 
What is an Amplifier?  
An amplifier by definition is a voltage generating device,  
recreating the signal which is input to in an identical but  
amplified form. It will be connected to a reactive load (the  
speaker). The impedance of this load and phase of the  
signalpassingthroughtheloadwillvary,dependentupon  
the frequency and amplitude of the input signal (music).  
Therefore, a perfect amplifier will be able to maintain the  
same output voltage regardless of load characteristics  
and will not alter the signal it is reproducing. A perfect  
amplifierwhenmeasuredbytheAudioGraphPowerCube  
would present data that forms a perfect cube. Unfortu-  
nately, amplifiers are not perfect. The laws of physics  
generally prevent it. A great amplifier is about the best  
one can hope for.  
As you can see by the PowerCube and as you will  
experiencebylistening, yourPunchamplifierisaGREAT  
AMPLIFIER!  
30  
 
WARRANTY INFORMATION  
Rockford Fosgate warrants all electronics to the original consumer/purchaser to be  
free from defects in materials or workmanship for a period of three (3) years. We will  
cover parts and labor provided the product was purchased from an Authorized  
Rockford Fosgate Dealer. This warranty does not apply to any product on which the  
seals and/or serial number have been broken, removed, tampered with, defaced or  
altered in any manner. This warranty applies only to the original consumer/  
purchaser and is not transferable.  
Electronics found to be defective during the warranty period will be repaired or  
replaced at Rockford Fosgates discretion. Repaired or replaced electronics will be  
covered by the balance of the original warranty period only. Rockford Fosgate shall  
not be responsible for any incidental or consequential damages resulting from a  
defect in electronics. Some states do not allow the exclusion or limitation of  
incidental or consequential damages, so the previous limitation may not be appli-  
cable.  
The warranty does not cover any appearance item, any cost or expense related to  
the removal or reinstallation of the product, any accessory used in conjunction with  
the product, damage to the product resulting from alteration, accident, misuse or  
abuse, or improper installation. This warranty does not apply if the parts or labor,  
which would otherwise be provided without charge under this warranty, are obtained  
from any source other than Rockford Fosgate or an Authorized Rockford Fosgate  
Service Center.  
This warranty is the only express warranty and does not create any implied  
warranties. Rockford Fosgate limits its obligations under any implied warranties  
under state laws to a period not to exceed the written warranty period. Some states  
do not allow limitation on how long an implied warranty lasts, so the above limitation  
may not apply. This warranty applies only to products sold in the United States of  
America or its possessions. For warranty outside the U.S.A., please contact the  
nearest Authorized Rockford Fosgate Dealer. This warranty gives the consumer  
specific legal rights, and the consumer may have other rights which vary from state  
to state.  
A defective product must be shipped prepaid to the Authorized Rockford Fosgate  
Dealer from which the consumer purchased the product or to the Rockford Fosgate  
factory in Tempe, Arizona in the original factory carton or equivalent. Any shipping  
loss or damage will be borne by the consumer or the consumers shipper.  
A
consumer returning a product to the factory should call (800) 669-9899 for a Return  
Authorization Number. All shipments shall be clearly marked with the Return  
Authorization Number on the outside of the shipping carton.  
Rockford will provide free shipping for electronics under warranty to Authorized  
Rockford Fosgate dealers. Prepaid, pre-addressed Federal Express airbills are  
available by calling Rockford Customer Service at 1-800-669-9899.  
Ship to:  
Rockford Corporation  
Warranty Repair Department  
2055 E. 5th Street  
Tempe, AZ 85281 U.S.A.  
Return Authorization Number:_________________  
 
Rockford Fosgate  
A Division of Rockford Corporation  
546 South Rockford Drive  
Tempe, Arizona 85281 U.S.A.  
In U.S.A., (602) 967-3565  
In Canada, call Korbon (416) 567-1929  
In Europe, Fax (49) 4207-801250  
REV. B 4/93  
MAN-0288  
 

Radio Shack Clock 09A02 User Guide
RCA Camcorder EZ101 User Guide
RCA Portable CD Player RP 7924
RCA TV Mount MAF121BKR User Guide
RSA Lighting Indoor Furnishings 500DCS User Guide
Ryobi Battery Charger AM00180 User Guide
Ryobi Power Screwdriver HP36KF User Guide
Samsung Personal Computer 191N GH17ASBS User Guide
Samsung Security Camera SCC B5342 User Guide
Schumacher Battery Charger INC 2405A User Guide