Rockford Fosgate PUNCH 4020 DSM User's Manual
Contents
1. XCard 1 Rear Front XCard XCard INSTALLATION CONSIDERATIONS The following is a list of tools you will need for installing the Punch amplifier Allen wrenches 7 64 amp 3 32 included Voltmeter Wire strippers Battery post wrench Electric hand drill w assorted bits Wire cutters Wire crimpers Assorted connectors This section focuses on some of the vehicle considerations for installing your new Punch amplifier Checking your battery and present sound system as well aspre planning your system layoutand best wiring routes will saveinstallation 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 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 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 6 Think before you drill Be careful notto cutor drill into gas tanks fuel lines brake or hydraulic lines vacuum lines or electrical wiring when working on any ve2. Check the alternator bat tery fuse and wiring and repair as necessary If the voltage is above 15 5 volts have the electrical system inspected by an authorized car service center Check the alternator bat tery fuse and wiring and repair as necessary If the voltage is above 15 5 volts have the electrical inspected by an authorized car service center Check wiring and repair as necessary Check connections substi tute with known working sourceand cablesand repair or replace as necessary Checksignal inputswitch and XCard positions and repair or replace as necessary Disconnect existing speak ers and test with known working speakers and wires If amplifier plays check and repair wiring and installa tion of speakers as neces sary Replace speakers Speaker Output Low or Distorted Amplifier Noise Turn on Pop Diagnosis Input gain signal for amplifier set too low Source unit output too low Speakers wired out of polarity from the left to right channel XCards are missing or not placed properly in crossover slots and or switch not properly se lected Low battery voltage or large voltage drops to theamplifierunderload Voltage spike from out put of preceding com ponent is entering am plifierthrough inputsig nal Voltage spike from re mote turn on lead is entering through REM input terminal sd Readjust input gains of amplifier Check system with known
3. Ou PuucH 4020 D SM 4 CHANNEL AMPLIFIER INSTALLATION amp OPERATION P Piockford fosqate Dear Customer Congratulations on your purchase of the world s finest brand of car audio amplifiers At Rockford Fosgate we are committed to musical reproduction at its best and we are pleased you chose our product Through years of engineering expertise hand craftsmanship and critical testing procedures we have created a widerange 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 trainingthrough Rockford echnical Traininglnstitute RTTI Please read your warranty and retain your receipt and original carton for possiblefuture use Toadd thefinishingtouch to your new Rockford Fosgateimageorder your Rockford accessories which include everything from T shirts and jackets to hats and sunglasses To get a free brochure on Rockford Fosgate products and Rockford accessories please call 602 967 3565 or FAX 602 967 8132 In Canada call Korbon Tradingat 905 567 1929 ForInternational orders FAX 001 1 602 967 8132 or call 001 1 602 967 3565 PRACTICE SAFE SOUND CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER 100dB MAY CAUSEPERMANENTHEARING LO SS HIGH POWERED AUTO SOUND SYSTEMSMAY PRODUCESOUND PRESSU RE LEVELS WELL OVER 130dB USECOMMON SENSE A
4. battery Install the fuseholder under the hood and prepare the cable ends as stated above Connections should be water tight 10 Preparealength of cableto be used forthe ground connection Strip 5 8 of insulation from the end of the cable as described above and connect to the appropriate terminal of the ampli fier Preparethe chassis ground by scraping any paintfrom 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 screw Prepare the REM turn on wire for connection to the amplifier by stripping 5 8 of insulation from the wire end and crimping an insulated spade connector in place Slide the connector overthe REM terminal on the amplifier Connectthe other end of the REM wire to a switched 12 volt positive source The switched signal is usually taken from the source unit s auto antenna or the accessory lead If the source unit does not have these outputs available the recommended solution is to wire a mechanical switch in line with a 12 volt source to activate the amplifier Connectthe source signal to the amplifier by plugging the RCA cables into the input jack s at the amplifier Connect the speakers Strip the speaker wires 5 8 and insert into the appropriate terminal on the amplifier Insert the bared wire into the speaker terminal and tighten the set screw to secureinto place Be sure to maintain pr
5. amplifier we suggest the use of a heavy duty battery high output alternator and a stiffening capacitor like the Rockford Fosgate PCH Cl WIRING THE SYSTEM CAUTION Avoid running power wires near the low level input cables antenna power leads sensitive equipment or harnesses The power wires carry substantial currentand could induce noise into the audio system 1 Plan the wire routing Take care when running signal level RCA cablesto keep them close together butisolated from the amplifier 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 2 Prepare the Power cable for attachment to the amplifier by stripping 5 8 of insulation from the end of the wire The use of 8 gauge power cable can interfere with the installation of the end caps Proper wire dress can prevent this from occurring To prevent the wire from fraying strip the insulation at a 45 angle Insert the bared wire into the B terminal with the long side of the insulation on the top Bend the cable down ata 90 angle Tighten the set screw to secure the cable in place NOTE TheB cableM UST be fused 18 or less from the vehicle s
6. gold plated connectors are immune to corrosion that can cause signal deterioration 4 Power Terminals The power and ground connectors on the Punch amplifier are gold plated and will accommodate up to 8 AWG wire maximizing the input current capability of the amplifier 5 REM Terminal This spade terminal is used for the AP auto power or remote turn on of the Punch amplifier 6 10 RCA Input Jacks The industry standard RCA jack provides an easy connection for signal level input They are gold plated to resist the signal degradation caused by corrosion Signal Input Switch This switch allows selection of 2 channel or 4 channel source unit feed Input Sensitivity Controls The inputlevel controls are preset for 500mV which will match the output of most source units Theycan beadjusted to match inputlevelsrangingfrom 150mV to 3V Internal Crossovers These builtin crossover cards are 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 LED Power Indicator The LED illuminates when the unit is turned on 20 Watts x 4 into 40 at 0 05 THD 30 Watts x 4 into 20 at 0 1 THD g ROCKFORD CORPORATION MADE IN THE USA Pockfordfosqate punh 4020 amPLIFIER DSM High Pass Low Pass Full Range il FULT d HPL
7. it A great amplifier is about the best one can hope to attain As you can see by the PowerCube and as you will experience by listening your Punch amplifier is a GREAT AM PLIFIER 22 SPECIFICATIONS Continuous Power Rating Competition Standard M easured at 13 8V RMS continuous power per channel all channels 20 Watts driven into a 4Q load from 20 20 000Hz with less than 0 0596 Total Harmonic Distortion THD RM S continuous power per channel all channels 30 Watts driven into 20 load from 20 to 20 000Hz with less than 0 1 THD RMS continuous power bridged into a 4Q load 60 W atts from 20 to 20 000Hz with less than 0 10 THD Dynamic Power Rating IHF 202 Standard M easured at 14 4V Mono into a 4Q Load 82 W atts Per channel into a 2Q Load 41 Watts Per channel into a 4Q Load 26 W atts Signal to N oise Ratio gt 100dB A weighted Factory Default Crossover Point 100Hz Butterworth Crossover Alignment 12dB octave Dimensions 9 5 8 W x 12 5 8 L x 2 5 8 H 24 4cm x 32 0cm x 6 6cm Damping Factor 9 4Q at output connetor 2150 Bandwidth 15Hz 100kHz 3dB Frequency Response 20Hz 20kHz 0 5dB Slew Rate 30 Vus IM Distortion IHF lt 0 05 Input Sensitivity Variable from 150mV to 3V Preset at the factory for 500mV Fuse size 30 Amp Input Impedance 20k Ohms Specifications are subject to change without notice 935 W ARRANTY INFORMATION Rockford Fosgate warrants all electronics to the or
8. join any of our current Punch or Punch Power amplifiers together W hile providing additional cooling through the coupling process the Punch Link adds the finishing touch by giving you the look of one awesome amplifier Additional crossover card frequencies are available for special ized requirements You can get the following XCards from your Authorized Rockford Fosgate D ealer 275Hz 400Hz 4 500Hz 6 500Hz Blank card for custom crossover TECHNICAL DESIGN FEATURES The transe ana TRAN S conductance Advanced Non multiplying Amplifier isa novel circuit that utilizes a short loop complemen tary topology and advanced Real Time Protection circuitry THERESULT An amplifier design with the benefits of tube and bi polar transistor amplifier design without the limitations of either MOSFET Devices Rockford Fosgate is one of the few manufacturers in any of the sound communities to utilize M O SFET devicesin both the power supply and the output stages MO SFET Metal Oxide Semicon ductor Field Effect 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 impedance and wider bandwidth linear ity In addition MOSFET and vacuum tubes share many impor tant operating characteristics However the MOSFET device is much faster wider in bandwidth measurably lower in distortion and far more
9. linear than vacuum tubes THE RESULT Operational characteristics of vacuum tubes without the performance limitations of tube design DSM Discrete Surface Mount Technology The DSM Discrete Surface M ount manufacturing process com bines the advantages of both discrete components and integrated circuitry Rockford Fosgate is the only American amplifier manu facturer to have invested millions into this process DSM compo nents differ from conventional discrete components in three different ways They are more compact and more rugged and they take much better advantage of the PC board to allow them to get rid of any heat they generate Using them wherever appropriate allows the advantages associated with discrete thru hole circuitry to be retained while also providing room for both highly advanced processing features and generous PC board copper paths where needed Their shortlead out structures allow maximum audio performance and highest signal to noise ratios Em to be obtained in amplifiers of desirable package size without resorting to amplifier on a chip shortcuts These advantages are shown below in Figure 1 THE RESULT Less connections improved reliability shorter signal paths superior signal to noise ratio and awesome sonic performance Figure 1 Component Solder Solder Thru Hole Surface M ount TO PAZ Tracking peration Pre Amplifier Zone The TOPAZ Tracking Operation Pre Amplifier Zo
10. the trunk will 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 long as you provide a sufficient amount of air for the amplifier to cool 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 affectthe performance ofthe amplifier and is strongly not recommended Engine Compartment Mounting Rockford Fosgate amplifiers should never be mounted in the engine compartment N ot only will this void your warranty but could create an embarrassing situation caused by the ridicule from your friends BATTERY AND CHARGING 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
11. working source and repair orreplace orignal source as needed Check speaker polarity and Correct as needed Check signal input switch and XCard positons and repair or replace as neces sary Check the alternator bat tery fuse and wiring and repair as necessary Disconnectinputsignal to amplifier and turn ampli fier on and off If noise is eliminated connect REM lead ofamplifierto source unit with a delay turn on module Use different 12 volt source for REM lead of amplifier i e battery di rect Ifnoiseis eliminated use relay to isolate ampli fier from noisy turn on output Engine Noise on the Speaker O ut puts of the Ampli fier Speaker leads are shorted to each other or to the chassis of the ve hicle RCA input from source unitis notconnected or not functioning prop erly RCA cableispicking up radiated noise Ground loopin antenna line Multiple grounding pathsin thesignal chain Disconnect existing speak ers and test with known working speakers If engine noise is gone check and repair wiring and installa tion of speakers as neces sary Check connections substi tute with known working cablesand repairorreplace as necessary Run the RCA cable on a different route Disconnect antenna from the source unit If engine noise is gone check and repair wiring and installa tion or use an antenna ground loop isolator Bypass all other equipment crossovers and eq
12. AMUS 23 Warranty Information emen 24 GETTING STARTED Welcome to Rockford Fosgate This manual is designed to provide information on the Punch 4020 amplifier for owner salesperson and installer To accomplish this the manual is divided into five main sections Introduction Installation Troubleshooting Specifi cations and W arranty Information For those of you who want quick information on how to install this product please turn to the Basic System Diagrams in the Installation section of this manual O ther information can be located by using the Table of Contents 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 new waysto improve our product thisinformation is subject to change without notice INTRODUCTION The Punch 4020 is a 4 channel amplifier which offers 20 W atts per channel when driven into 4 O hms The amplifier utilizes a 2 4 input selector switch and XCard crossovers When building a 4 channel amplifier a major design challenge is to maintain sound quality in a limited space For the Punch 4020 Rockford Fosgate Engineers designed the Transe Ana to pology whichisa fast shortloop circuitallowingthe output stage to be driven with a low voltage drive signal With the addition of a 2 4 input selector switch and XCard crossovers the 4020 can be configured in many popular system designs withoutthe added Cost of external process
13. Front and Rear operate independently Front is operating in stereo Rear is operating in stereo Experiment with subwoofer polarity to determine which sounds best in your system 14 4 CHANNEL STEREO FRONT MONO REAR Front Gain elec d Front Speakers Bridged Mono Rear Speakers ON AN 40 Minimum 20 Minimum Low Frequency High Frequency Rear XCard Front XCard LP HP XCard 2 Note can be inserted HP LP or Full Range Signal input switch to 4 channel input Gain for Front and Rear operate independently Front is operating in stereo Rear is operating in stereo Fader on source unit controls level of subwoofer Experiment with subwoofer polarity to determine which sounds best in your system 15 2 CHANNEL MONO Bridged Mono Rear Speakers Front Gain o 40 Minimum 40 Minimum Low Frequency Low Frequency Rear XCard Front XCard LP XCard 2 Note XCard can be inserted in HP LP or Full Range Signal input switch to 2 channel input Gain for Front and Rear operate independently Front is operating in mono Rear is operating in mono 16 4 CHANNEL STEREO MONO F
14. ND PRACTICE SAFE SOUND 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 Besureto have your serial number model number and date of purchase available when you call Theserial number can befound on theoutsideof thebox Please record it in the space provided below as your permanent record This will serve as verification of your factory warranty and may become useful in recovering your amplifier if it is ever stolen Serial Number Model Number TABLE OF CONTENTS OM e 1 Punch 4020 Amplifier Accessory 1 Rockford Fosgate lt 5 2 emn 2 Technical Design Features sssssseeeeee nme 3 Punch 4020 Design Features sssssseeeeemen 6 Installation Considerations 32 e 8 Mounting LOCAL ON c 9 Battery and Charging eei o pei ares tr teure EPA ROC ERRARE dd 10 Wiring the System sssseeeeeneennenemeeeennennnnnnne 10 Using tHE A0 To e 12 Sample Wiring Diagrams seeeeeene nen 14 Troubleshooting esses 18 Dynamic Power M 21 SpecifiCallons ie ba era E e r Pre PODER E
15. RONT STEREO REAR pcs E o L Bridged Mono Bridged Mono y Front Rear Rear Speakers Front Speakers Front Gain Ir ITN 20 20 Minimum High Frequency High Frequency Vai 20 High Frequency 40 Minimum Rear XCard Front XCard Low Frequency HP Full Range Note XCard can be inserted in HP LP or Full Range Signal input switch to 4 channel input Gain for Front and Rear operate independently Front is operating in stereo MONO Rear is operating in stereo Fader on source unit controls level of rear lu TROUBLESHOOTING Amplifier doesnot turn on Power LED is off Amplifier has no sound Power LED ison Voltage applied to the REM terminal of the amplifierisnotbetween 10 5 and 15 5 volts or there is no voltage present Voltage to the B termi nal of the amplifier is not between 10 5 and 15 5 volts or there is no voltage present Amplifier is not prop erly grounded RCA Input from source unitis not connected or notfunctioningproperly XCards are missing or not placed properly in crossover slots and or switches are not prop erly selected Speaker leads are shorted to each other or to the chassis of the ve hicle Speakers are defective 18
16. g the card into the socket High Pass Low Pass Full Range E UM xU The crossover pointcan be altered by changing the resistor value Usethefollowingformula to selectthe appropriate resistor value to be placed on the XCard in for 047uf cap The actual formula is 1 R in for 022uf cap 2nfoC R Q fo desired crossover frequency capacitor in farads ex 047 x 106 for 047mf cap 4020 Power CONNECTIONS Connect to remote turn on lead of source unit Connect to chassis ground of vehicle Less than 18 Connect to B of battery with a 30 amp fuse Keep grounds as short as possible c3 SAMPLE WiRING DiAGRAMS 4 CHANNEL STEREO L R ridged woh nt Speakers Bridged Mono Rear Speakers Front Gain e Rear Gain 1 E E VAN AFROS 20 Minimum High Frequency ti N FOI Rear XCard Front XCard HP Y XCard 2 EU Note XCard can be inserted in HP LP or Full Range Signal input switch to 4 channel input Gain for
17. hicle 7 Never run wires underneath the vehicle Running the wires inside the vehicle provides the best protection 8 Avoid running wires over or through sharp edges U se 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 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 Groundingconnectionsshould be asshortas possible and always be connected to metal thatis welded to the main body or chassis of the vehicle 8 MouNTING LOCATION Themountinglocation and position ofyouramplifier will have a great effect on its ability to dissipate the heat generated under normal operation The design of our cast aluminum heatsink serves to easily dissipate the heat generated over a wide range of operating condi tions However to maximize the performance of your amplifier 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 Mounting the amplifier upside down to the rear deck of
18. iginal 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 Thiswarranty does notapply 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 only applies 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 Fosgate s 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 notallow the exclusion or limitation of incidental or consequential damages so the previous limitation may not be applicable 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 orabuse orimproperinstallation Thiswarranty does notapply ifthe parts orlabor which would otherwise be provided withoutcharge underthis warranty are obtained from any source other than Rockford Fosgate or an Authorized Rockford Fosgate Service Center This warrant
19. ing procedure is then graphed 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 AudioGraph The PowerCube MODELBENG VOLTAGE FROM 2 STEREO STED BATTERY BRIDGED MONO Amplifier PUNCH AMP 14 4V x 2 Rated Power Rated Output Watts per Channel Serial No Owner ROCKFORD CORPORATION 80 60 84 30 84 W 0 83 30 84 60 85 40 60 159 W 154 W 153 W 154 W 60 158 W w o z a a OUTPUT VOLTAGE PHASE ANGLES W hat is an Amplifier An amplifier by definition is a voltage generating device recreating the signal which isinputto it identically but with increased volume It will be connected to a reactive load the speaker The impedance ofthisload and phase ofthe signal passing through the load will vary dependent upon the frequency of the input signal music Therefore a perfectamplifier will be able to maintain the same output voltage regardless of load characteristics and will notalter the signal it is reproducing A perfect amplifier when measured by the AudioGraph PowerCube would present data that forms a perfect cube Unfortunately amplifiers are not perfect The laws of physics generally prevent
20. lifiers output power in excess of 10 distortion They use many names for this measurement such as Total Maximum Power or Maximum O utput Power This is not indicative of the actual usable output power Listening to Loudspeakers N ot Resistors A loudspeaker is nota resistor A resistor s value resistance measured in ohms is fixed A loudspeaker s impedance is dynamic It is constantly changing in value dependent upon the frequency of the input signal Therefore 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 M ost people do not listen to music through a resistor A 4Ohm speaker may experience a drop in impedance 4 6 timeslower than its nominal printed impedance A speaker will also create phase shifts in the signal thatis passed through it These phase shifts happen because a speaker is an inductor voice coil and a capacitor compli ance 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 differentloads Ittests at8 Ohms 4 O hms 2 O hmsand 10 Each ofthese impedancesisalso tested at 60 305 0 4 30 and 460 phase angles These different impedances and phase angles represent the shifts in impedance and phasethatcan occurin atypical loudspeaker Appendix A 21 Information Cubed The data acquired the test
21. ne circuitry solves ground loop noise problems common to automotive amplifier design This innovative new developmentallows vastly improved isolation of the input signal grounds from the power supply ground of the amplifier Thisis accomplished by allowing the source unit to control the potential environment of the entire input structure or zone of the amplifier This process improves the noise rejection of the amplifier by 30 40dB an astounding 30 100 times better than amplifiers without TO PAZ THE RESULT Elimination of troublesome ground loop noise between source and amplifier XCard Internal Crossover The Punch 4020 amplifier utilizes internal active crossovers These crossovers have many performance advantages such as using dis crete components for exact frequency adjustments which are far superior to potentiometers Additionally the XCard can be config ured for high pass low pass and full range operation With slight modification many crossover frequencies and slope configurations can be achieved THE RESULT Increased system design flexibility with a precise electronic crossover without the limitations of conventional poten tiometer designs RTP Real Time Protection NOMAD NOn Multiplying Advanced Decision The Punch 4020 amplifier uses an analog computer process to absolutely maximize safe output power under all operating condi tions Rockford Fosgate pioneered and developed RTP Real Time Pr
22. ope Fax 49 4207 801250 In Japan Fax 81 559 79 1265 10 94 MAN 0808 A
23. oper speaker polarity DO NOT chassis ground any of the speaker leads as unstable operation may result Performa final check of the completed system wiring to ensure thatall connections are accurate Check all power and ground connections for frayed wires and loose connections which could cause problems from road vibrations After the final inspection is complete install the power fuse and enjoy listening During the initial listening period you may need to fine tune any phasing and level settings within your particular vehicle To aid in this procedure play a track with high musical content and cruise around your neighbor hood After fully evaluating the transient response of your system and making any final adjustments all your neighbors within a 1 mile radius will assume that you have just success fully completed another upgrade to your audio system for which they will probably spill thumbtacks on your driveway 11 USING THE XCarpD The crossover functions are controlled through the use of an XCard and can be set for high pass low pass or full range operation These cards are shipped in the most common fre quency Each crossover card hastwo faces oneface operates Full Range the other has arrows to indicate the edge for selecting HP high pass or LP low pass operation O rientthe card with the desired operating edge indicated by the arrow toward the socket terminals inside the amplifier Firmly butcarefully plu
24. ors The result is an excellent sounding amplifier in a physically compact area The Punch 4020 satisfies the need for a powerful 4 channel amplifier at a competitive price We strongly recommend you have your Authorized Rockford Fosgate Dealer install the new Punch 4020 amplifier If you do choose to install it yourself please be sure to read the entire manual before beginning PuncH 4020 AmpPLIFIER Accessory The accessory pack shipped with the Punch 4020 amplifiers include the mounting hardware necessary to secure it to the vehicle as well as attaching the end caps Installation amp Operation M anual Punch Verification Certificate 10 Hex Head screws for speaker and power connectors 4 Mounting screws for end caps 4 Mounting screws for amplifier 1 Allen wrench 7 64 1 Allen wrench 13 32 ROCKFORD FOSGATE ACCESSORIES The following accessories were designed to enhance the perfor mance of the Punch 4020 amplifier Energy Storage Capacitor PCH C1 The Punch 1 farad capacitor is used to provide extra current needed by amplifiers to reproduce musical transients The Punch Cap also has the natural ability to filter DC ripple caused by the alternator which can result in noise in the system The PCH C1 will maximize both the sound quality and performance that Rockford Fosgate amplifiers can deliver Punch Link FG LINK The Punch Link is a specially cast heatsink interconnect which allows you to
25. otection a crucial element in the performance edge of our amplifiers The innovative NOMAD NOn Multiplying Advanced Decision system is the most sophisticated version of this technique ever used bringing previously unavailable levels of accuracy stability temperature immunity and reliability to this critical pro cess NOMAD makes advanced decisions based on device voltages to precisely control the awesome levels of current available in the output M SFETs to safe values but only when absolutely needed TH E RESULT Extremely fast protection system that always protects the amplifier and never degrades the sound 4020 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 N input cables giving the amplifier a clean stealth look wo t 4 A Bridged Mon jc Front Speakers m Front Gain 2 O gt D Rear Gain S E D El Rear Speakers End Caps Interchangeable end caps conceal the wiring and uu Bridged mE 5 4 jojo B 3 Speaker Terminals The heavy duty gold plated terminal block connectors and will accept wire sizes from 8 AWG to 18 AWG These
26. ualizers by connecting the head unit directly to the amp If noise is gone reconnect equip ment one piece at a time and test for noise after each install f noise persists see your Authorized Rockford Fosgate Dealer 20 DvNAMiIC Power MEASUREMENTS About the Dynamic Power Measurements The Audio Graph PowerCube isa testinstrumentused to measure the output of an amplifier in accordance with IH F 202 industry stan dards The IH F 202 standard is a dynamic power measurement and was developed as a means of measuring power in a manner that best represents the Real W orld operation of an amplifier Many manufac turers including Rockford Fosgate at times will measure amplifier power into a fixed resistor 4 O hm 2 Ohm While this method is useful in some types of evaluation and testing itis not representative of an amplifier that is connected to a speaker and playing music Music Music is dynamic the sound waves are complex and constantly changing In order to simulate this the IH F 202 standard calls for the input signal to the amplifier to be a 1KHz bursted tone This signal is input on for 20 milliseconds and reduced 20dB for 480 millisec onds The signal is gradually increased in level until the amplifier s output exceeds 1 Total Harmonic Distortion THD At 1 distor tion becomes audible therefore any power produced above that level is considered not usable Many manufacturers represent their amp
27. y is the only express warranty and does not create any implied warranties Rockford Fosgate limits its obligations under any implied warranties understate lawsto a period notto exceed the written warranty period Some states do not allow limitation on how long an implied warranty lasts so the above limitation may notapply Thiswarranty appliesonlyto productssold intheU nited States of America or its possessions For warranty outside the U S A please contactthe nearest Authorized Rockford Fosgate D ealer 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 Arizonain the original factory carton or equivalent Any shipping loss or damage will be borne by the consumer or the consumer s shipper A consumer returning a product to the factory must 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 Ship to Rockford Corporation Warranty Repair Department 2055 E 5th Street Tempe AZ 85281 U S A Return Authorization Number Rockford Fosgate Rockford Corporation 546 South Rockford Drive Tempe Arizona 85281 U S A In U S A 602 967 3565 In Canada call Korbon 905 567 1929 In Eur
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