Rockford Fosgate Punch 3X User manual


O WNER ’ S M ANUAL

3X AND 5X
E LECTRONIC C ROSSOVER

Dear Customer,
Congratulations on your purchase of America’s finest brand of car audio
components. At Rockford Fosgate we are committed to musical reproduc-
tion at its best, and we are pleased you chose our product. Through years
of engineering expertise, hand craftsmanship and critical testing proce-
dures 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
providespecializedtrainingthroughRockfordTechnicalTrainingInstitute
(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 wearables, which include everything from T-shirts and jackets to
hats and sunglasses.
To get a free brochure on Rockford Fosgate products and Rockford accesso-
ries, please call 1-800-366-3565 or FAX [phone] in the U.S. For
Canada,callKorbonTradingat905-567-1920.ForinternationalordersFAX
001-1-602-967-8132 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 AUTO
SOUND 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 be sure
torecorditinthespaceprovidedbelowasyourpermanentrecord. Thiswill
become useful in recovering your product if ever stolen and serve as
verification of your factory warranty.
Serial Number: __________________________________________
Model Number: ___________________________________

SPECIFICATIONS
Maximum Input Level 2V RMS
Input Impedance 20,000Ω
Maximum Output Level 2V RMS
Output Impedance 500Ω
Frequency Response 20Hz to 20kHz
+0dB –0.5dB
Signal to Noise Ratio >105dB
Distortion <0.02% THD + Noise
Channel Separation >75dB
Dimensions Punch 3X 4.8" x 4.1" x 1.8"
12.19cmx10.41cmx4.57cm
Punch 5X 4.8" x 5.55" x 1.8"
12.19cmx10.41cmx4.57cm
Factory Equipped Crossover Cards 100Hz
Crossover Slope 12dB per octave
Factory Supplied Alignment Butterworth
Specifications subject to change.
i

TABLE OF CONTENTS
Specifications................................................................................ i
Punch 3X and 5X Packing List......................................................1
Introduction .................................................................................1
Operating Features .................................................................1
Design Features............................................................................2
1. Gold Plated RCA Jacks .......................................................3
2. Power Terminals ................................................................3
3. LED Power Indicator ..........................................................3
4. Crossover Cards .................................................................3
5. Input Mode Switch .............................................................3
6. Phase Switch ......................................................................3
7. Mounting Holes .................................................................3
8. Fusing ................................................................................3
Installation Considerations ...........................................................4
Mounting and Wiring the Active Crossover ..................................5
B+ ..........................................................................................5
GND ......................................................................................5
REM .......................................................................................5
Input/Output Levels & Connections........................................6
Selecting the Crossover Cards ......................................................6
Using The Dual Filter ...................................................................8
Installing the Crossover Cards ......................................................8
Filter Effects..................................................................................9
Wiring Diagrams........................................................................10
Appendix A - Building A Custom Crossover Card.......................16
Butterworth Resistor Chart..........................................................17
Warranty....................................................................................18

INTRODUCTION
PUNCH 3X / 5X PACKING LIST
Punch Electronic Crossover
2 Mounting Screws
Owner's Manual
This manual provides information on the features, installation and
operation of the Punch 3X and 5X Electronic Crossover. We suggest
you save this manual for future reference.
WestronglyrecommendyouhaveyourAuthorizedRockfordFosgate
Dealerinstallyournewactivecrossover.Ifyoudochoosetoinstallthe
unit yourself, please be sure to read the entire manual before begin-
ning your installation.
OPERATING FEATURES
ThePunch3Xand5XElectronicCrossoversprovideforstate-of-theart
flexibility and performance demanded by today’s car audio enthusi-
asts. Features include:
3-Way Selectable Electronic Crossover modules that feature 12dB
per octave filters that give precise crossover points and allow for
individual selection of high-pass, low-pass or full range filter opera-
tion.
2 or 4-Channel Input Mode Switch enables you to select two (2) or
four (4) channels of input.
6 Outputs on the Punch 3X for Front, Rear and a Dual-Filtered, Non-
Faded Output.
10 Outputs on the Punch 5X. In addition to the outputs found on the
Punch 3X, the 5X also has Front and Rear Dual-Filtered Outputs for
creating additional pass band filter combinations.
GoldPlatedRCAInputandOutputJacksreducecorrosionwhichcan
cause signal deterioration over time.
DualFiltered,Non-FadedOutputwithPhaseReversalSwitchallows
youtocreatevariouspassbandconfigurations.Inaddition,thephase
reversal switch enables you to easily correct for phase problems that
may be inherent in some system designs.
– 1 –

DESIGN FEATURES
Punch 5X - Top Inside View
Rem
B+
GND
78
6
2
7
1Front Input
Rear Input
Front Output
Front Dual-Filtered Output
3
Dual Filtered Non-Faded Output
Rear Dual-Filtered Output
Rear Output
1
4
Punch 3X - Top Inside View
7
Front Input
Rear Input
1
3
2
Rem
B+
GND
7
Front Output
Dual Filtered Non-Faded Output
Rear Output
4
5
56 8
– 2 –
1
REMOVING THE COVER
The unique design of the 3X and 5X allows the cover to be removed
foraccesstothecrossoversandeaseofinstallation.Thecover can be
installedineitherdirectiontomatchtherestofthesystem.Thetopend
ofthecoverhastwotabswhichfitsnuglyintoslotsateitherendofthe
base.Caremustbetakennottobendthesecuringtabswhenremoving
the top cover. A screw secures the cover. Press this screw to release
the cover for removal.

1. Gold Plated RCA Jacks
All input and output RCA jacks are gold plated. The gold plated
finish resists tarnishing and corrosion from interfering with the
signal quality.
2. Power Terminals
The B+, Rem and Gnd connections are made using gold plated
screwterminalsonthebarrierstrip.Thegold platingresiststarnish
and corrosion and maintains connection integrity. The terminals
alloweasyconnectionofthepowerwiresthroughtheuseofforked
lugsorbarewireupto12gauge.Thebarriershelppreventshorting
from frayed wires.
3. LED Power Indicator
TheLED,locatedbytheinputjacks,providesavisualindicationof
the status of the crossover, lighting when the unit is turned on.
4. Crossover Cards
Crossover filter functions are determined by the use of plug in
cards.Eachcardcanbeconfiguredforhigh-pass,low-passandfull
range operation. Resistors on each module determine the operat-
ing frequency.
5. Input Mode Switch
When the input mode switch is in the two channel position the
front input jacks feed all the filters. When set to the four channel
position, the front and rear input jacks feed the respective filters.
Front and rear channels are summed for the non-faded filter.
6. Phase Switch
Thephaseswitchallowseasilyinvertingpolarityonthenon-faded
output to compensate for phase inversion in the system.
7. Mounting Holes
The crossover must be mounted on a flat surface. Two mounting
holes in the bottom allow securing the crossover.
8. Fusing
Thecrossoverhasa1/2ampAGCfastblowpowerprotectionfuse.
If it is necessary to replace the fuse, use only the same type and
rating or the warranty may be voided.
– 3 –

INSTALLATION CONSIDERATIONS
This section focuses on some of the vehicle considerations for
installing your new Punch Electronic Crossover. Checking your
batteryandcurrentsoundsystem,aswellaspre-planningyoursystem
layout and best wiring routes will save installation time. When
deciding how to lay out your new system, be sure that each compo-
nent will be easily accessible for making adjustments.
Beforebeginninganyinstallation,besuretofollowthesesimplerules:
1. Be sure to carefully read and understand the instructions before
attempting to install the crossover.
2. For safety, disconnect the negative lead from the battery prior to
beginning the installation.
3. For easier assembly, we suggest you run all wires prior to
mounting your electronic crossover in place.
4. Route all of the RCA cables close together and away from any
high current wires.
5. Use high quality connectors for a reliable installation and to
minimize signal or power loss. See your Authorized Rockford
Fosgate Dealer for Perfect Interface wire enhancements.
6. Thinkbeforeyoudrill! Becarefulnottocutordrillintogastanks,
fuel lines, brake or hydraulic lines, vacuum lines or electrical
wiring when working on any vehicle.
7. Never run wires underneath the vehicle. Running the wires
inside the vehicle provides for best protection.
8. Avoid running wires over or through sharp edges. Use rubber or
plastic grommets to protect any wires routed through metal,
especially the firewall.
9. ALWAYS protect the battery and electrical system from damage
with proper fusing. Install a fuse holder and fuse on the +12V
power wire within 18”(45.7 cm) of the battery terminal.
10. When grounding to the chassis of the vehicle, scrape all paint
from the metal to ensure a good, clean ground connection.
Groundingconnectionsshouldbeasshortaspossibleandalways
be connectedtometalthatisweldedtothemainbody,orchassis,
of the vehicle.
– 4 –

MOUNTING AND WIRING THE
ELECTRONIC CROSSOVERS
– 5 –
The information below describes the various considerations for
mountingandconnecting the activecrossovers. For additionalinfor-
mation see the wiring diagrams beginning on page 10.
Note: Rockford Fosgate’s Perfect Interface line of accessories in-
cludes high quality power and speaker cables, gold plated RCA
interconnectcablesandotherproductstocompleteyourcustomized
installation. Ask your Authorized Rockford Fosgate Dealer about
Perfect Interface.
Werecommendmountingthecrossoverasclosetotheamplifier(s)as
possible.
The B+ (Power) supplies power to the unit. Connect this terminal to
a constant +12 Volt power source by way of an in-line fuse.
TheGND (PowerGround)grounds the unit.Connectthisterminal to
thechassis of thevehicle. When grounding the unitbe sure toscrape
allpaintfromthemetaltoensureagood,cleanelectricalconnection.
The REM (Remote Turn-On) turns on the unit by way of a +12 Volt
supply source. Connect this terminal to the source unit’s “Amplifier”
or“AutoAntenna”lead,eitherofwhichwillgoto+12voltswhenever
the source unit is on.
IfyoursourceunitdoesnothaveeitheraRemoteoranAutoAntenna
lead (or if the Auto Antenna goes down during tape operation), we
recommend installing a switch to control the unit manually.
INPUT/OUTPUT LEVELS & CONNECTIONS
The Punch Electronic Crossovers are designed for preamp (input up
to2VRMS)levels.Netgaininthecrossoverisunity.(Outputlevelsare
equal to input levels.)
When connecting the input and output terminals be sure to use high
quality shielded interconnecting RCA cables.
•Connect source unit's OUTPUT jacks to the desired crossover
INPUT jacks.
•Connectthedesiredcrossover’sOUTPUT jackstotheAmplifier’s
INPUT jacks.

SELECTING THE CROSSOVER CARDS
ThePunch3Xand5Xareshippedwith100Hzandblankconfigurable
cards installed. The following cards are available factory built from
your Authorized Rockford Fosgate Dealer.
XM50 50Hz
XM70 70Hz
XM100 100Hz
XM150 150Hz
XM200 200Hz
XM275 275Hz
XM400 400Hz
XM 4.5k 4.5kHz
XM 6.5k 6.5kHz
Eachcardcanbeusedforhigh-pass,low-passorfullrangeoperation.
Themodeofoperationisdeterminedbytheorientationof the cardin
its socket. These same cards are used in other Rockford Fosgate
products.
The following illustrations show the cards shipped in the 3X and 5X.
Asconfigured,outofthebox,eachcardissetforfullrangeoperation.
– 6 –
Punch 3X
100 Hz
100 Hz
100 Hz
Blank
Front Output
Dual Filtered
Non-Faded Output
Rear Output

Punch 5X
100 Hz
100 Hz
100 Hz
100 Hz
100 Hz
Blank
Blank
Blank
Front Output
Front Dual
Filtered Output
Dual Filtered
Non-Faded Output
Rear Dual
Filtered Output
Rear Output
– 7 –
The Punch 3X and the Punch 5X both have Dual Filter sections. The
DualFilterisatwostagecascadedfilterwhichusestwocards.Thefirst
card determines the initial action and the second, the subsequent
action. The most common usage would be to use a low-pass module
in the first position followed by a high-pass module in the second to
build a bandpass function. By using two cards of the same action at
the same frequency the filter slope is increased to 24dB per octave.
Both sockets must be used for a simple 12dB per octave filter. Install
the card in the second position for full range operation.
The operation of each filter section is determined by the use of plug
in cards. These multifunctional cards are available for a multitude of
operational frequencies, and their orientation in the socket deter-
mines their function. Each socket has a blank plastic side which
positions the card against the spring loaded contacts. The front, or
active,face of the card is marked with arrowsto indicate which edge
plugsintothesocket.Orientthecardwiththechosenfacetowardthe
contactsandplugitintothesocketoftheappropriatefilteroperation.
Therearfaceofthecardisforfullrangeoperationandeitheredgecan
be used.
USING THE DUAL FILTER
INSTALLING THE CROSSOVER CARDS

Example:ThePunch3Xshipswiththree(3)100HzcardssetintheFull
Range position. The crossover will pass through all 20Hz - 20kHz
frequencies. The following diagram shows examples of the types of
response curves when programming for a High-Pass, Low-Pass or
Bandpass setting.
– 8 –
Gain
(dB)
20Hz 20kHz
Gain
(dB)
20Hz 20kHz
High-Pass Crossover Setting Response
Gain
(dB)
20Hz 20kHz
Low-Pass Crossover Setting Response
Bandpass Crossover Setting Response
Note: The Dual-Filtered Output Channels contain a blank crossover card.
As with the Front and Rear Outputs, the default positioning for these cards is
set at Full Range.
FILTER EFFECTS

WIRING DIAGRAMS
3X – 2-Way with Passive Crossover




Tweeter
Tweeter
Midrange
Midrange
Subwoofer
2-Channel Amplifier
2-Channel Amplifier
2-Channel Amplifier
Source Unit
3x Crossover
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+


High-Pass
Crossover
Tweeter
Tweeter
Midrange
Midrange
Subwoofer
0°
180°**
2
4*
High-Pass
Low-Pass
High-Pass
Low-Pass
Front High-Pass
@ 12dB/octave slope
Rear High-Pass
@ 12dB/octave slope
Summed Output
@ 24dB/octave slope
High-Pass
Crossover
High-Pass
Crossover
High-Pass
Crossover
*2 or 4 Channel can be selected if user desires fader capability.
** Try Phase Switch for summed output and set to position that sounds best.
FIGURE 1
– 9 –



Subwoofer
2-Channel Amplifier
2-Channel Amplifier
2-Channel Amplifier
Source Unit
3x Crossover
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
Tweeter
Tweeter
Midrange
Midrange
Subwoofer
High-Pass
Low-Pass
Low-Pass
High-Pass
Low-Pass
@ 12dB/octave slope
Bandpass Output
@ 12dB/octave slope
High-Pass Output
@ 12dB/octave slope




0°
180°**
2
4*
FIGURE 2
* Try Phase Switch for summed output and set to position that sounds best.
3X – 3-Way Basic System
– 10 –

3X – 2-Way with Amplifier's Active Crossover


Tweeter
Subwoofer
4-Channel Amplifier
with Crossover***
(High-Pass)
(Low-Pass)
2-Channel Amplifier
Source Unit
3x Crossover
–
+
–
+
–
+
–
+
–
+
High-Pass
Low-Pass
High-Pass
Low-Pass
Summed Output
@ 24dB/octave slope
Tweeter
Front High-Pass
@ 12dB/octave slope
Rear High-Pass
@ 12dB/octave slope
Front Bandpass
Both rolloffs @ 12dB/octave slope
Rear Bandpass
Both rolloffs @ 12dB/octave slope

DSM

4 4
–
+
–
+
Midrange
Midrange
Tweeter
4-Channel Amplifier
with Crossover***
(High-Pass)
(Low-Pass)
–
+
–
+
Tweeter

DSM

4 4
–
+
–
+
Midrange
Midrange
0°
180°**
2
4*
*2 or 4 Channel can be selected if user desires fader capability.
** Try Phase Switch for summed output and set to position that sounds best.
*** Additional filtering provided by internal crossovers in the amplifiers.
FIGURE 3
– 11 –

5X – Basic System
2-Channel Amplifier
–
+
–
+


Midrange
Midrange
Tweeter
2-Channel Amplifier
Source Unit
5x Crossover
–
+
–
+
Summed Output
@ 24dB/octave slope
Tweeter
Front High-Pass
@ 12dB/octave slope
Rear High-Pass
@ 12dB/octave slope
Front Bandpass
Both rolloffs @ 12dB/octave slope
High-Pass
Low-Pass
Low-Pass
Low-Pass
High-Pass
High-Pass
Low-Pass
High-Pass


2-Channel Amplifier
–
+
–
+


Midrange
Midrange
Front Bandpass
Both rolloffs @ 12dB/octave slope
Tweeter
2-Channel Amplifier
–
+
–
+
Tweeter




Subwoofer
2-Channel Amplifier
–
+
–
+
–
+
0°
180°**
2
4*
*2 or 4 Channel can be selected if user desires fader capability.
** Try Phase Switch for summed output and set to position that sounds best.
FIGURE 4
– 12 –

5X – 2-Way with 24dB Slopes




Midrange/Tweeter
Subwoofer
2-Channel Amplifier
2-Channel Amplifier
2-Channel Amplifier
Source Unit
5x Crossover
–
+
–
+
–
+
–
+
–
+
–
+
–
+


Summed Output
@ 24dB/octave slope
Midrange/Tweeter
Midrange/Tweeter
Midrange/Tweeter
Front High-Pass
@ 24dB/octave slope
Rear High-Pass
@ 24dB/octave slope
Not
Used
Not
Used
Not Used
High-Pass
Low-Pass
High-Pass
Not Used
High-Pass
Low-Pass
High-Pass
0°
180°**
2
4*
FIGURE 5
*2 or 4 Channel can be selected if user desires fader capability.
** Try Phase Switch for summed output and set to position that sounds best.
– 13 –

5X – 4-Way System
Tweeter
2-Channel Amplifier
Source Unit
5x Crossover
–
+
–
+
Tweeter
Low-Pass
@ 24dB/octave slope
High-Pass
@ 12dB/octave slope
Bandpass
Both rolloffs @ 12dB/octave slope
Not Used
Low-Pass
Low-Pass
Low-Pass
High-Pass
High-Pass
Low-Pass
High-Pass


2-Channel Amplifier
–
+
–
+


Midrange
Midrange
Bandpass
Both rolloffs @ 12dB/octave slope
Subwoofer
Not Used**
–
+
2-Channel Amplifier
–
+
–
+


Mid Bass
Mid Bass
2-Channel Amplifier
–
+
–
+


0°
180°**
2
4
FIGURE 6
*2 or 4 Channel can be selected if user desires fader capability.
** Try Phase Switch for summed output and set to position that sounds best.
– 14 –

APPENDIX A
BUILDING ACUSTOM CROSSOVER CARD
– 15 –
The 3X and 5X both ship with blank cards which can be assembled
toselect any frequency you need for yoursystem's design. Each card
is built using 4 capacitors and 4 resistors, the value of the resistors
determines the operating frequency. The custom cards are also
available as model number XM00 from your Authorized Rockford
FosgateDealer.Thefollowingsectionhasinstructionsonassembling
the card. The PC Board is fragile and extra care should be taken to
avoid damage.
Items Needed:
1. Soldering Pencil
40 to 60 Watt electronic soldering iron
2. 60/40 resin core solder
3. Solder Braid - to keep surface free of excess solder
4. Capacitors - Each card uses four .022µF capacitors. These should
be metal film capacitors with a minimum rating of 16 volts.
5. Resistors - Each card uses four resistors. The resistance is deter-
mined by the operating frequency (refer to the following chart).
These can be either 1/8 or 1/4 Watt, 1% or 5% tolerance.
6. Wire Cutters
Refer to the following illustration for component placement. Install
theresistors,fromthefullrangeface,andfoldtheleadsslightlytoward
the inside of the board to hold them in position. Solder the resistors
in place, use the solder braid to remove any exces solder. Install the
capacitors in the same manner. Trim the component leads. Examine
the board carefully to ensure there is no solder splashed paying
particular attention to the contacts on each edge. Make sure that the
leads do not interfere when plugging the card into the socket.
Crossover Card
High Pass
Low Pass
Full Range
FULL
R2
R1
R2
R1

Freq. R1
18.5Hz 390k Ohm
26Hz 270k Ohm
33Hz 220k Ohm
40Hz 180k Ohm
48Hz 150k Ohm
60Hz 120k Ohm
72Hz 100k Ohm
88Hz 82k Ohm
106Hz 68k Ohm
130Hz 56k Ohm
154Hz 47k Ohm
185Hz 39k Ohm
220Hz 33k Ohm
270Hz 27k Ohm
330Hz 22k Ohm
400Hz 18k Ohm
480Hz 15k Ohm
600Hz 12k Ohm
720Hz 10k Ohm
880Hz 8.2k Ohm
1.06kHz 6.8k Ohm
1.3kHz 5.6k Ohm
1.54kHz 4.7k Ohm
1.85kHz 3.9k Ohm
2.2kHz 3.3k Ohm
2.7kHz 2.7k Ohm
3.3kHz 2.2k Ohm
4.0kHz 1.8k Ohm
4.8kHz 1.5k Ohm
6.0kHz 1.2k Ohm
7.2kHz 1k Ohm
8.8kHz 820 Ohm
10.6kHz 680 Ohm
13.0kHz 560 Ohm
15.4kHz 470 Ohm
Electronic Crossover Field Programmable Card Resistor Chart
Butterworth Alignment
Use 5% resistors in conjunction with .022mF standard capacitor.
390k Ohm
270k Ohm
220k Ohm
180k Ohm
150k Ohm
120k Ohm
100k Ohm
82k Ohm
68k Ohm
56k Ohm
47k Ohm
39k Ohm
33k Ohm
27k Ohm
22k Ohm
18k Ohm
15k Ohm
12k Ohm
10k Ohm
8.2k Ohm
6.8k Ohm
5.6k Ohm
4.7k Ohm
3.9k Ohm
3.3k Ohm
2.7k Ohm
2.2k Ohm
1.8k Ohm
1.5k Ohm
1.2k Ohm
1k Ohm
820 Ohm
680 Ohm
560 Ohm
470 Ohm
R2 R1 R2
Low Pass High Pass
390k Ohm
270k Ohm
220k Ohm
180k Ohm
150k Ohm
120k Ohm
100k Ohm
82k Ohm
68k Ohm
56k Ohm
47k Ohm
39k Ohm
33k Ohm
27k Ohm
22k Ohm
18k Ohm
15k Ohm
12k Ohm
10k Ohm
8.2k Ohm
6.8k Ohm
5.6k Ohm
4.7k Ohm
3.9k Ohm
3.3k Ohm
2.7k Ohm
2.2k Ohm
1.8k Ohm
1.5k Ohm
1.2k Ohm
1k Ohm
820 Ohm
680 Ohm
560 Ohm
470 Ohm
390k Ohm
270k Ohm
220k Ohm
180k Ohm
150k Ohm
120k Ohm
100k Ohm
82k Ohm
68k Ohm
56k Ohm
47k Ohm
39k Ohm
33k Ohm
27k Ohm
22k Ohm
18k Ohm
15k Ohm
12k Ohm
10k Ohm
8.2k Ohm
6.8k Ohm
5.6k Ohm
4.7k Ohm
3.9k Ohm
3.3k Ohm
2.7k Ohm
2.2k Ohm
1.8k Ohm
1.5k Ohm
1.2k Ohm
1k Ohm
820 Ohm
680 Ohm
560 Ohm
470 Ohm
– 16 –