Rockford Fosgate PUNCH 40.2 How to use

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car audio
fanatics
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2-Channel Amplifiers
Operation & Installation
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Dear Customer,
Congratulations on your purchase of the world's finest brand of car audio amplifiers.
AtRockfordFosgatewearefanaticsaboutmusicalreproductionatitsbest,andweare
pleasedyouchoseourproduct.Throughyearsofengineeringexpertise,handcraftsman-
ship 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.
Greatproductandcompetent installationsareonlyapieceofthepuzzle whenitcomes
to your system. Make sure that your installer is using 100% authentic installation
accessories from Connecting Punch in your installation. Connecting Punch has
everything from RCA cables and speaker wire to Power line and battery connectors.
Insist on it! After all, your new system deserves nothing but the best.
To add the finishing touch to your new Rockford Fosgate image order your Rockford
wearables,which include everything from T-shirts and jackets tohats and sunglasses.
To get a free brochure on Rockford Fosgate products and Rockford accessories, in the
U.S.call602-967-3565orFAX602-967-8132.Forallothercountries,call+001-602-
967-3565 or FAX [phone].
If, after reading your manual, you still have questions regarding this product,
we recommend that you see your Rockford Fosgate dealer. If you need further
assistance, you can call us direct at 1-800-795-2385. Be sure to have your serial
number, model number and date of purchase available when you call.
PRACTICE SAFE SOUND™
CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER
100dBMAY 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 serve as
verificationofyourfactorywarrantyandmaybecomeusefulinrecoveringyour
amplifier if it is ever stolen.
Serial Number: ________________________________
Model Number:________________________________

TABLE OF CONTENTS
Introduction .............................................................................................1
Punch Amplifier Accessory Pack .............................................................. 1
Technical Design Features .......................................................................2
Design Features........................................................................................5
Installation Considerations ....................................................................... 7
Mounting Location................................................................................... 8
Battery and Charging................................................................................9
Wiring the System ....................................................................................9
Using Passive Crossovers .......................................................................12
Table of Component Values ................................................................... 13
Using the XCard..................................................................................... 14
Resistor Chart......................................................................................... 15
Installation .............................................................................................16
System Diagrams.................................................................................... 20
Rockford Fosgate Accessories................................................................. 24
Troubleshooting ..................................................................................... 26
Dynamic Power Measurements.............................................................. 29
Specifications......................................................................................... 31
Warranty Information............................................................................. 33
International Information........................................................................ 34
Sections marked
ADVANCED OPERATION
include in-depth
technical information
Sections marked
TROUBLESHOOTING
include recommendations
for curing
installation problems
Sections marked
INSTALLATION
include “slam dunk”
wiring connections
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Welcome to Rockford Fosgate! This manual is designed to provide
information for the owner, salesperson and installer. For those of you
who want quick information on how to install this product, please turn
to the Installation Section of this manual or refer to the icons listed
below.OtherinformationcanbelocatedbyusingtheTableofContents.
We, at Rockford Fosgate, have worked very hard to make sure all the
information in this manual is current. But, as we are constantly finding
newways to improve our product, thisinformationissubject to change
without notice.
GETTING STARTED
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INTRODUCTION
Rockford engineers designed the Punch 40.2, 60.2, 100.2and 200.2
amplifiers to withstand the rugged automotive environment while
delivering superior sound quality in a flexible, reliable, and efficient
package. TRANS•ANA is a low voltage circuit in the preamp stage
of all Punch .2amplifiers that lets the music sound crystal clear and
very real, even when played at high volume levels. This is matched
with TOPAZ, a unique grounding circuit used to eliminate noise
problems associated with car audio systems and their installation.
Flexibilityis accomplished with theuseofa built-in XCard. Reliabil-
ity is all but guaranteed with the use of a protection circuit called
NOMAD, while MOSFET and DSM (Discrete Surface Mount) tech-
nologyimproveamplifierefficiency.Theresultofthesecomponents
give the Punch amplifier awesome sound quality in a “Bullet Proof”
package. An explanation of these technologies, most of which are
exclusivelydesignedand patentedbyRockford,aredescribedinthe
Technical Design Features.
– 1 –
PUNCH AMPLIFIER ACCESSORY PACK
The accessory pack shipped with the Punch 2-channel amplifiers
includes the mounting hardware necessary to secure the amp to the
vehicle as well as attaching the end caps.
Installation & Operation Manual
Punch Verification Certificate
(4) Amplifier mounting screws (#8 x 3/4" Phillips)
(6) Speaker & power connector screws (3/32" Allen)
(4) End cap mounting screws (9/64" Allen)
(1) Allen Wrench 9/64"
(1) Allen Wrench 3/32"
(1) ATC Inline Fuseholder (Punch 40.2, 60.2, 100.2)
(1) AGU Inline Fuseholder (Punch 200.2)
(1) ATC 20 Amp Fuse (Punch 40.2)
(1) ATC 30 Amp Fuse (Punch 60.2)
(1) ATC 40 Amp Fuse (Punch 100.2)
(1) AGU 50 Amp Fuse (Punch 200.2)

TECHNICAL DESIGN FEATURES
– 2 –
◆TRANS•ANA
(TRANSconductance Active Nodal Amplifier)
The TRANS•ANA (TRANSconductance Active Nodal Amplifier) is a
circuitthatallowstheaudiosignaltopassthroughtheamplifieratlow
voltage. The signal is directly level-shifted to the fixed high voltage
rails via a pair of driver transistors. Signal linearity is assured by an
active node formed by the drive transistors at ultrasonic frequencies.
This allows amplifier performance similar to trans• nova which is
highly stable and linear while utilizing the advantages of a non-
floating power supply.
THERESULT:Anextendedfrequencybandwidthaccuratelysupplied
to the output stages of the amplifier.
◆TOPAZ (Tracking Operation Pre-Amplifier Zone)
The TOPAZ (TrackingOperationPre-AmplifierZone)circuitrysolves
groundloopnoiseproblemscommontoautomotiveamplifierdesign.
Thisinnovativenewdevelopmentallowsvastlyimprovedisolationof
the input signal grounds from the power supply ground of the
amplifier.Thisisaccomplishedbyallowingthesourceunittocontrol
the potential “environment”of the entire input structure or “zone”of
the amplifier. This process improves the noise rejection of the ampli-
fier by 30-40dB –an astounding 30-100 times better than amplifiers
without TOPAZ.
THERESULT:Eliminationoftroublesomegroundloopnoisebetween
source and amplifier.

◆DSM (Discrete Surface Mount) Technology
The DSM (Discrete Surface Mount) manufacturing process combines
the advantages of both discrete components and integrated circuitry.
RockfordFosgateistheonlyAmericanamplifiermanufacturertohave
invested millions into this process. DSM components differ from
conventional discrete components in different ways. They are more
compact, more rugged, and they efficiently dissipate generated heat.
Using them wherever appropriate allows the advantages associated
with discrete circuitry to be retained while also providing room for
both highly advanced processing features and generous PC board
copper paths where needed. Their short lead-out structures allow
maximumaudioperformanceandhighestsignal-to-noiseratios tobe
obtained in amplifiers of desirable package size without resorting to
“amplifier-on-a-chip”shortcuts. These advantages are shown below
in Figure 1.
Figure 1
THE RESULT: Fewer connections, improved reliability, shorter signal
paths,superiorsignal-to-noiseratioandawesomesonicperformance.
◆XCard (Internal Crossover)
The Punch amplifiers utilize internal active crossovers. These cross-
overs have many performance advantages such as using discrete
componentsforexactfrequencyadjustmentswhicharefarsuperiorto
potentiometers. Additionally, the XCard can be configured for high-
pass, low-pass and full range operation. With slight modifications,
manycrossoverfrequenciesandslopeconfigurationscanbeachieved.
THE RESULT: Increased system design flexibility with a precise
electronic crossover without the limitations of conventional potenti-
ometer designs.
– 3 –
Solder Solder
Component
Thru-Hole Surface Mount
PC
Board PC
Board

◆MOSFET Devices
Rockford Fosgate is one of the few manufacturers in the sound
community to utilize MOSFET devices in both the power supply and
the output stages . MOSFET (MetalOxideSemiconductor FieldEffect
Transistor) devices offer several important inherent advantages over
the 30 year old technology of bi-polar design. These advantages
include: thermal stability, switching speed, ultra low output imped-
ance and wider bandwidth linearity. In addition, MOSFETs operate
verysimilarly to vacuumtubesin whichtheyare more linearthanbi-
polartransistors.However,MOSFETscandeliverthemidrangeclarity
without the limitations of transient response and high frequency
phase shifting normally associated with tube operation.
THE RESULT: Operational characteristics similar to vacuum tubes
without the performance limitations of tube design.
◆NOMAD (NOn-Multiplying Advanced Decision)
The Punch amplifiers use an analog computer process to maximize
safe output power under all operating conditions. The innovative
NOMAD (NOn-Multiplying Advanced Decision) system is the most
sophisticatedversionofthistechniqueeverused,bringingpreviously
unavailable levels of accuracy, stability, temperature immunity and
reliability to this critical process. NOMAD makes advanced deci-
sions based on device voltages to precisely control the awesome
levelsofcurrentavailableintheoutputMOSFETstosafevalues–but
only when absolutely needed.
THE RESULT: Extremely fast protection system that always protects
the amplifier and never degrades the sound.
– 4 –
◆Punch EQ
The Punch EQ helps correct for acoustical deficiencies in the
listeningenvironment.Two unique potentiometers that control bass
and treble compensate for the response errors present in most car
environments. Unlike conventional tone controls, Punch EQ cor-
rects the specific problems of poor low bass response and high
frequency rolloff.
THE RESULT: Full range sound without excessive boost in areas
where it is not needed.

DESIGN FEATURES
1. Cast Aluminum Heatsink –The cast aluminum heatsink of the
Punch amplifier dissipates heat generated by the amplifier's
circuitry. The inherent advantage of casting provides a 30%
improvement of cooling over conventional extrusion heatsink
designs.
2. End Caps –The unique end caps conceal the wiring and input
cables, giving the amplifier a clean “stealth”look.
+R–+L–Bass
Right
Gain
Right
Input
Left
Input
Left
Gain
Treble
Speaker Speaker
3 8 7 7
6 6 83
3. Speaker Terminals –Theheavy duty, gold-plated terminal block
connectors (+ and –) will accept wire sizes from 8 AWG to 18
AWG. These gold-plated connectors are immune to corrosion
that can cause signal deterioration.
4. Power Terminals –The power and ground connectors on the
Punchamplifieraregold-platedandwillaccommodateupto8AWG
wire maximizing the input current capability of the amplifier.
5. REM Terminal –This gold-plated spade terminal is used for the
auto power/remote turn on of the Punch amplifier.
6. RCAInputJacks–TheindustrystandardRCAjacksprovide easy
connections for signal level input. They are gold-plated to resist
the signal degradation caused by corrosion.
49 5
GNDB+
LED
REM
– 5 –

7. Input Sensitivity Controls –The input level controls are preset
tomatchtheoutput of most source units. They can be adjusted
to match output levels from a variety of source units.
8. Punch Equalization Controls –ThePunchEQhelpscorrect for
acoustical deficiencies in the listening environment. The Bass
control allows a narrow band adjustment of up to 18dB
centered at 45Hz. The Treble control is a wide band hinged
adjustment with a maximum of 12dB at 20kHz. The Punch EQ
can be bypassed by turning the controls to their minimum or
counterclockwise position.
9. LED Power Indicator –The LED illuminates when the unit is
turned on.
10. XCard (Internal Crossover) –This built-in crossover card is
configurable for a multitude of operating frequencies. The
orientation of the card in its socket determines the function of
high-pass, low-pass, or full range operation.
– 6 –
HP
LP
HP
LP
FULL
For Bridged Mono Wiring
Connect 4Ωmono woofer + to L+ of amplifier
and mono woofer –to R–of amplifier. Amplifier
will operate mono/stereo simultaneously.
ROCKFORD CORPORATION
MADE IN THE USA
®
®
20 Watts RMS continuous power per
channel into 4 Ohms with less than 0.08%
Total Harmonic Distortion from 20-20kHz
AMPLIFIER
Do Not Chassis
Ground Any Speaker.
+–
L+ R–
Low-Pass
Full Range
High-Pass
10

INSTALLATION CONSIDERATIONS
The following is a list of tools you will need for installing the Punch
amplifier:
Allen wrenches 9/64" & 3/32" (included) Voltmeter
Wire strippers Battery post wrench
Electric hand drill w/assorted bits Wire cutters
17' (518.16cm) Red Power Wire Assorted connectors
12' (365.76cm) Remote Turn-On Wire Wire crimpers
1.5' (45.72cm) Black Grounding Wire
– 7 –
This section focuses on some of the vehicle considerations for
installing your new Punch amplifier. Checking your battery and
presentsoundsystem,aswellaspre-planningyoursystemlayoutand
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.
Beforebeginninganyinstallation,besuretofollowthesesimplerules:
1. Be sure to carefully read and understand the instructions before
attempting to install the amplifier.
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 amplifier in place.
4. RoutealloftheRCAcablesclosetogetherandawayfromanyhigh
current wires.
5. Use high quality connectors for a reliable installation and to
minimize signal or power loss.
6. Thinkbeforeyoudrill! Becarefulnottocutordrillintogastanks,
fuel lines, brake or hydraulic lines, vacuum lines or electrical
wiring when working on any vehicle.
7. Neverrunwiresunderneaththevehicle. Runningthewiresinside
the vehicle provides the 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 fuseholder and appropriate fuse on
the+12Vpowerwirewithin18”(45.7cm)ofthebatteryterminal.
10. When grounding to the chassis of the vehicle, scrape all paint
from the metal to ensure a good, clean ground connection.
Groundingconnectionsshouldbeasshortaspossibleandalways
beconnectedtometalthatisweldedtothemainbody,orchassis,
of the vehicle.

MOUNTING LOCATION
The mounting location and position of your amplifier will have a
greateffectonitsabilitytodissipatetheheatgeneratedduringnormal
operation.The design of ourcastaluminumheatsink serves to easily
dissipate the heat generated over a wide range of operating condi-
tions.However,tomaximizetheperformanceofyouramplifier,care
should be taken to ensure adequate ventilation.
Trunk Mounting
Mounting the amplifier vertically on a surface with the fin grooves
running up and down will provide the best cooling of the amplifier.
Mounting the amplifier on the floor of the trunk will work but
provides less cooling capability than vertical mounting.
Mountingtheamplifierupsidedowntothereardeckofthetrunkwill
not provide proper cooling and will severely affect the performance
of the amplifier and is strongly not recommended.
Passenger Compartment Mounting
Mounting the amplifier in the passenger compartment will work as
longasyouprovideasufficientamountofairfortheamplifiertocool
itself. If you are going to mount the amplifier under the seat of the
vehicle, you must have at least 1" (2.54cm) of air gap around the
amplifier's heatsink.
Mounting the amplifier with less than 1" (2.54cm) of air gap around
the amplifier's heatsink in the passenger compartment will not
provide proper cooling and will severely affect the performance of
the amplifier and is strongly not recommended.
Engine Compartment Mounting
Rockford Fosgate amplifiers should never be mounted in the engine
compartment.Notonlywillthisvoidyourwarrantybutcouldcreate
an embarrassing situation caused by the ridicule from your friends.
– 8 –

BATTERY AND CHARGING
– 9 –
Amplifiers will put an increased load on the vehicle's battery and
charging system. We recommend checking your alternator and
battery condition to ensure that the electrical system has enough
capacity to handle the increased load of your stereo system. Stock
electrical systems which are in good condition should be able to
handle the extra load of any Rockford amplifier without problems,
although battery and alternator life can be reduced slightly. To
maximize the performance of your Rockford Fosgate amplifier, we
suggest the use of a heavy duty battery and an energy storage
capacitor.
WIRING THE SYSTEM
CAUTION: Avoid running power wires near the low level input
cables,antenna,powerleads,sensitiveequipmentorharnesses.The
power wires carry substantial current and could induce noise into
the audio system.
•For safety, disconnect the negative lead from the battery prior to
beginning the installation.
1. ConfiguretheinternalXCardcrossoverspriortoinstallation.Refer
to “Using the XCard”(page 14) for further information.
2. Plan the wire routing. Take care when running signal level RCA
cablestokeepthemclosetogetherbutisolatedfromtheamplifier's
power cables and any high power auto accessories, especially
electric motors. This is done to prevent coupling the noise from
radiated electrical fields into the audio signal. When feeding the
wires through the firewall or any metal barrier, protect them with
plastic or rubber grommets to prevent short circuits. Leave the
wires long at this point to adjust for a precise fit at a later time.
3. Prepare the Power cable for at-
tachmenttotheamplifierbystrip-
ping 5/8" of insulation from the
end of the wire. To prevent the
wirefromfraying,striptheinsula-
tionata45°angle.Insertthebared
wireinto the B+ terminal with the
long side of the insulation on the
top.Bendthecabledownata90°
angle. Tighten the set screw to secure the cable in place.
><
5/8"
INSULATION
STRIP WIRE
>
>
AMP
>

– 10 –
Punch 40.2, 60.2, 100.2
Trim the power cable to within 18" of the battery and install the
protectiverubber boot, which is packed with the fuseholder, over
theendofthewire.Strip3/8"ofinsulationfromthewireandinsert
into the end of the fuseholder, then crimp it in place. Slide the
rubberboot into placetocover the connection.Usethe section of
cable that was trimmed earlier and connect it to the other end of
the fuseholder.
Punch 200.2
Mount the fuseholder within 18" of the battery using two (2) #8
screws. Disassemble the fuseholder. You should have 2 black
plastic end caps, 2 gold-plated fuse clips, a plastic spacer and the
fuseholder body. Trim the amplifier power cable to reach the
fuseholder and strip the wire 3/8". Slide one of the end caps over
the wire (narrow end first) and insert the wire into one of the fuse
clips. Tighten the set screw. Screw the black end cap to the
fuseholder body to secure the cable. Use the section of cable that
was trimmed earlier and connect it to the other end of the
fuseholder. Install the plastic spacer in the fuseholder and attach
the cable to the fuseholder body.
NOTE: TheB+cableMUSTbefused18"orlessfromthevehicle's
battery. Install the fuseholder under the hood and prepare the
cable ends as stated above. Connections should be water tight.
4. Strip3/8"fromthebatteryendofthepowercableandcrimpalarge
ring terminal to the cable. Use the ring terminal to connect to the
battery positive terminal. Do not install the fuse at this time.
5. Prepare a length of cable to be used for the ground connection.
Strip 5/8" of insulation from the end of the cable as described
previously and connect to the appropriate terminal of the ampli-
fier. Prepare the chassis ground by scraping any paint from the
metal surface and thoroughly clean the area of all dirt and grease.
Strip the other end of the wire and attach a ring connector. Fasten
the cable to the chassis using a non-anodized screw and a star
washer.

6. Prepare the REM turn-on wire for connection to the amplifier by
stripping 1/4" of insulation from the wire end and crimping an
insulated spade connector in place. Slide the connector over the
REMterminal onthe amplifier.Connectthe otherendof theREM
wire to a switched 12 volt positive source. The switched signal is
usuallytakenfromthesourceunit'sautoantennaortheaccessory
lead. If the source unit does not have these outputs available, the
recommendedsolutionistowireamechanicalswitchinlinewith
a 12 volt source to activate the amplifier.
7. Securelymounttheamplifier(withsuppliedscrews)tothevehicle
or amp rack. Be careful not to mount the amplifier on cardboard
orplasticpanels.Doingsomayenablethescrewstopulloutfrom
the panel due to road vibration or sudden vehicle stops.
8. Connect the source signal to the amplifier by plugging the RCA
cables into the input jacks at the amplifier.
9. Connectthespeakers.Stripthespeakerwires5/8".Insertthebared
wire into the speaker terminal and tighten the set screw to secure
intoplace. Besuretomaintainproperspeakerpolarity. DONOT
chassis ground any of the speaker leads as unstable operation
may result.
10. Perform a final check of the completed system wiring to ensure
that all connections are accurate. Check all power and ground
connectionsfor frayed wires and loose connections which could
cause problems.
11. After the final inspection is complete, install the power fuse and
enjoy listening. During the initial listening period, you may need
to“finetune”anyphasingandlevelsettingswithinyourparticular
vehicle. To aid in this procedure, play a track with high musical
content and cruise around your neighborhood. After fully evalu-
ating the transient response of your system and making any final
adjustments,allyourneighborswithina1mileradiuswillassume
thatyouhavejustsuccessfullycompletedanotherupgradetoyour
audio system for which they will probably spill thumbtacks on
your driveway.
– 11 –

USING PASSIVE CROSSOVERS
Apassivecrossoverisacircuitthat uses capacitors and/or coils and is
placed on speaker leads between the amplifier and speaker. The
crossover delegates a specific range of frequencies to the speaker for
optimumdriverperformance.Acrossovernetworkcanperformoneof
three functions: High-Pass (capacitors), Low-Pass (inductors or coils)
and Bandpass (combination of capacitor and coil).
Themost commonlyusedpassive crossovernetworksare 6dB/octave
systems. These are easy to construct and require one component per
filter. Placing this filter in series with the circuit will reduce power to
the speaker by 6dB/octave above or below the crossover point
depending on whether it is a high-pass or low-pass filter. More
complex systems such as 12dB/octave or 18dB/octave can cause
impedance problems if not professionally designed.
Passive crossovers are directly dependent upon the speaker's imped-
ance and component value for accuracy. When passive crossover
components are used in multiple speaker systems, the crossover's
effect on the overall impedance should be taken into consideration
along with the speaker's impedance when determining amplifier
loads. CAUTION: The Punch amplifiers are not recommended for
impedance loads below 2 Ω stereo and 4 Ω bridged (mono) loads.
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Stereo/Mono Operation
TABLE OF CROSSOVER COMPONENT VALUES
6 dB/Octave Low-Pass 6 dB/Octave High-Pass
Freq.
Hertz Speaker Impedance
80 4.1mH 1000µF 8.2mH 500µF 16mH 250µF
100 3.1mH 800µF 6.2mH 400µF 12mH 200µF
130 2.4mH 600µF 4.7mH 300µF 10mH 150µF
200 1.6mH 400µF 3.3mH 200µF 6.8mH 100µF
260 1.2mH 300µF 2.4mH 150µF 4.7mH 75µF
400 .8mH 200µF 1.6mH 100µF 3.3mH 50µF
600 .5mH 136µF 1.0mH 68µF 2.0mH 33µF
800 .41mH 100µF .82mH 50µF 1.6mH 26µF
1000 .31mH 78µF .62mH 39µF 1.2mH 20µF
1200 .25mH 66µF .51mH 33µF 1.0mH 16µF
1800 .16mH 44µF .33mH 22µF .68mH 10µF
4000 .08mH 20µF .16mH 10µF .33mH 5µF
6000 51µH14µF .10mH 6.8µF .20mH 3.3µF
9000 34µH 9.5µF68µH 4.7µF .15mH 2.2µF
12000 25µH 6.6µF51µH 3.3µF 100µH 1.6µF
2 OHMS 8 OHMS
4 OHMS
LC L CL C
LC
L = Low-Pass (Inductor)
C = High-Pass (Capacitor)
For more information, see your Authorized Rockford Fosgate Dealer.
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– 14 –
3386
fo= R (in kΩ) for .047µµ
µµ
µf cap
= R (in kΩ) for .022µf cap
7234
fo
Where: R = Ω
fo= desired crossover frequency
c = capacitor in farads
ex: .047 x 10-6 for .047mf cap
Crossover Card
High Pass
Low Pass
Full Range
R1 R2 R1 R2
FULL
The crossover point can be altered by changing all 4 resistor values.
Use the following formula to select the appropriate resistor value to
be placed on the XCard.
USING THE XCARD
1
2πfoc
The actual formula is:
R =
Low-Pass Full RangeHigh-Pass
FULL
↕
HP
➝
➝
LP
HP
➝
➝
LP
The crossover functions are controlled through the use of an XCard
and can be set for high-pass, low-pass or full range operation. The
XCardshippedwithyouramplifierissetforFullRange.Eachcrossover
cardhastwofaces:onefaceoperatesFull Range,theotherhasarrows
to indicate the edge for selecting HP (high-pass) or LP (low-pass)
operation. Orient the card with the desired operating edge, indicated
bythearrow,towardthesocketterminalsinsidetheamplifier.Firmly,
but carefully, plug the card into the socket.
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RESISTOR CHART
– 15 –
Frequency R1 R2
20Hz 169kΩ169kΩ
25Hz 133kΩ133kΩ
30Hz 110kΩ110kΩ
35Hz 95.3kΩ95.3kΩ
40Hz 84.5kΩ84.5kΩ
45Hz 75kΩ75kΩ
50Hz 68.1kΩ68.1kΩ
55Hz 61.9kΩ61.9kΩ
60Hz 56.2kΩ56.2kΩ
65Hz 52.3kΩ52.3kΩ
70Hz 48.7kΩ48.7kΩ
75Hz 45.3kΩ45.3kΩ
80Hz 42.2kΩ42.2kΩ
85Hz 40.2kΩ40.2kΩ
90Hz 37.4kΩ37.4kΩ
200Hz 16.9kΩ16.9kΩ
300Hz 11.3kΩ11.3kΩ
400Hz 8.45kΩ8.45kΩ
500Hz 6.65kΩ6.65kΩ
600Hz 5.62kΩ5.62kΩ
700Hz 4.75kΩ4.75kΩ
800Hz 4.22kΩ4.22kΩ
900Hz 3.74kΩ3.74kΩ
1kHz 3.40kΩ3.40kΩ
1.2kHz 2.80kΩ2.80kΩ
2kHz 1.69kΩ1.69kΩ
3kHz 1.10kΩ1.10kΩ
4kHz 845Ω845Ω
5kHz 665Ω665Ω
6kHz 562Ω562Ω
7kHz 487Ω487Ω
8kHz 422Ω422Ω
Butterworth Alignment Q = .707
1% resistors used with 0.047µµ
µµ
µF caps Butterworth Alignment Q = .707 1% resistors used with 0.022µµ
µµ
µF caps
Ourtestshaveshownthatusing0.047µfcapacitors forfrequencies below100Hz, and
0.022µf capacitors for frequencies above 100Hz, result in more linear crossover
control. Refer to the Specifications page to determine the capacitor value of each
supplied XCard.
a
d
v
a
n
c
e
d
O
p
e
r
a
t
i
o
n
Frequency R1 R2
20Hz 357kΩ357kΩ
25Hz 287kΩ287kΩ
30Hz 237kΩ237kΩ
35Hz 205kΩ205kΩ
40Hz 178kΩ178kΩ
45Hz 162kΩ162kΩ
50Hz 143kΩ143kΩ
55Hz 130kΩ130kΩ
60Hz 121kΩ121kΩ
65Hz 110kΩ110kΩ
70Hz 102kΩ102kΩ
75Hz 95.3kΩ95.3kΩ
80Hz 90.9kΩ90.9kΩ
85Hz 84.5kΩ84.5kΩ
90Hz 80.6kΩ80.6kΩ
200Hz 35.7kΩ35.7kΩ
300Hz 23.7kΩ23.7kΩ
400Hz 17.8kΩ17.8kΩ
500Hz 14.3kΩ14.3kΩ
600Hz 12.1kΩ12.1kΩ
700Hz 10.2kΩ10.2kΩ
800Hz 9.9kΩ9.9kΩ
900Hz 8.6kΩ8.6kΩ
1.0kHz 7.15kΩ7.15kΩ
1.2kHz 6.04kΩ6.04kΩ
2.0kHz 3.57kΩ3.57kΩ
3.0kHz 2.37kΩ2.37kΩ
4.0kHz 1.76kΩ1.76kΩ
5.0kHz 1.43kΩ1.43kΩ
6.0kHz 1.21kΩ1.21kΩ
7.0kHz 1.02kΩ1.02kΩ
8.0kHz 909Ω909Ω

– 16 –
INSTALLATION
*Keep grounds as short as possible
Power Connections
I
N
S
T
A
L
L
A
T
I
O
N
® ®
LED
Connect to remote
turn-on lead of
source unit
Connect to chassis
ground of vehicle*
Connect to B+ of battery with
appropriate fuse value
Less than 18"
GNDB+
P40.
2
P60.2
P100.2
P200.
2
- 20A
- 30A
- 40A
- 50A
REM

– 17 –
I
N
S
T
A
L
L
A
T
I
O
N
® ®
Stereo Operation
Bass
Right
Gain
Right
Input
Left
Input
Left
Gain
Treble
–
+
+L–
Speaker +R– Speaker
–
+
RCA Input
2Ωmin.
2Ωmin.
•RCA inputs are connected to both left and right channels
•Gain for left and right channels operate independently
•Impedance for each channel should be 2 Ω minimum
•XCard can be set for High-Pass, Low-Pass or Full Range