Infinity 202a Car Amplifier User Manual
Contents
1. KAPPA 202a WIRING CONNECTIONS front panel PS i gt 40A gt BRIDGE REM R L 5 8 a 0 o 40A o KAPPA 202a WIRING CONNECTIONS rear panel Figure7 Wiring connections for the Kappa 202a amplifier 6 Infinity Kappa 202a Power Amplifier INSTALLATION continued 3 Make sure the wires are firmly seated in each Weco 2 pin connector and that each screw is completely tightened Insert the wired connectors into the POWER sockets on the amplifier Press each one in until it stops 4 Using the Weco 5 pin connector connect a blue wire from the source unit s remote connection to the REM terminal Depending on polarity requirements e g bridged mono or tri mode configurations see Figures 1 through 3 on page 3 connect speaker wires from the speakers to the L and R and terminals as required by your system plan 5 Make surethe wires are firmly seated in the Weco 5 pin connector and that each screw is completely tightened Insert the wired Weco 5 pin connector into the 5 pin socket on the amplifier Press it in until it stops 6 Connect RCA cables from a source unit to the L and R INPUT jacks SETTING THE CROSSOVER IMPORTANT If you plan to use the Kappa 202a to drive full range speakers set both AMP and AUX filters to FLAT refer to Figure 1 on page 3 and Figure 8 below and skip to the next section Setting Input Sensitivity 1 Set the CROSSOVER2. crack the cover Owner s Manual Installation Guide 7 TROUBLESHOOTING Use the following guide to identify symptoms and solve problems Make sure the vehicle s electrical system is working properly and power is reaching the Kappa 202a i e green LEDs on the top panel are on SYMPTOM No audio Distorted audio Audio lacks punch SPECIFICATI KAPPA 202A Power Output 4 ohms LIKELY CAUSE Low No Remote Turn On Voltage Speakers are not connected or are blown Input sensitivity and or bass control is not set properly Speakers are wired with wrong polarity ONS SOLUTION Check connections test turn on voltage Check wiring use VOM DVM to measure speaker coil impedance See Setting Input Sensitivity and Seating DBO on previous page Check polarity of connections refer to Applications page 3 2 x 200 watts coc ro aa SYMPTOM LIKELY CAUSE SOLUTION Audio cycles A protection circuit Verify the following off and on is turning the electrical system is Amber prote amplifier off and on between 10 15 5 Vdc tion LEDs on temperature is not top panel are on over 194 F 90 C no short circuits speaker loads are not less than 1 ohm 2 ohms in mono Audio cycles GAIN is set toohigh Se Input Sensitivity off and on correctly see previous Amber protection page LEDs on top panel are on Fuse blows Incorrect wiring or Check connections short circuit refer to Applications see
3. UF LP e HP LFLAT P SP A eHP U e FLAT X o T P U T Owner s Manual Installation Guide 3 SYSTEM EXPANSION KAPPA 52a L R Inputs Figure4 In this example system a Kappa 52a drives L R Outputs a pair of 54 speakers Low Pass The 102a s stereo low pass E outputs feed a bridged mono Kappa 102a to drive a single 12 subwoofer FLAT PM ni PA HP MfN r j T P 1 Tweeter 4 Midrange D System y L R Inputs 1 Tweeter D L R Outputs 4 Midrange Low Pass System Figure5 In this expanded system a Kappa 52a drives a pair of component systems The 52a s low pass outputs feed a Kappa 102a to drive a stereo pair of 6 mid bass speakers The 102a s low pass outputs feed a bridged mono Kappa 202a to drive a single 12 subwoofer NOTE Many different systems are possible using the crossover settings on Kappa amplifiers induding ones with 24 dB per octave slopes achieved through cascaded configurations For more information consult your Infinity Car Audio dealer 12 Subwoofer E A 9 M e mA lsh a
4. Lo Infinity CAR AUDIO Kappa 202a 2 Ch Power Amplifier O wner s M anual Installation G uide KAPPA 202A POWER AMPLIFIER The Kappa 202a is a member of Infinity s new Kappa series of mobile power amplifiers Housed within the sleek extruded aluminum frame you ll find the latest advances in circuit topology along with user conveniences like a wide range input sensitivity control auxiliary outputs and a built in electronic crossover With features like these and more you can quickly try out a variety of system ideas and because the Kappa 202a belongs to a related product family you re assured future expansion will look as good as it sounds KAPPA 202A AMPLIFIER FEATURES The Kappa 202a is a 2 channel power amplifier that offers stereo bridged mono or tri mode operation and is rated at 200 watts rms per channel into a 4 ohm load In a bridged mono configuration it can deliver up to 600 watts rms for the same load The 202a also features e 2 ohm operation rated at 300 watts rms per channel e A bridge stereo switch for fast system setup e A built in 12 dB per octave electronic crossover variable from 32 to 320 Hz e Dynamic Bass Optimizer DBO 12 dB per octave subsonic filter with variable frequency 20 to 80 Hz and Q for enhancing low frequencies while conserving amplifier power e Individually selectable high and low pass filters with through pass for amplifier and aux
5. aximum amplifier performance we encourage you to read the remaining pages before installing and operating your new Infinity Kappa Power Amplifier Especially review the Applications section on the next page for ideas on designing a system Also save these instructions for future reference IMPORTANT Installation of automotive stereo com ponents can require extensive experiencein performing a variety of electrical and mechanical procedures Although these instructions explain how to install a Kappa Power Amplifier in a general sense they do not show the exact installation methods for your particular vehicle If you do not have the experience do not attempt the installation yourself instead ask your Authorized Infinity Car Audio Dealer about professional installation options DECLARATION OF CONFORMITY CE We Infinity Systems A S Kongevejen 194B DK 3460 Birkered DENMARK declare in own responsibility that the product described in this owner s manual is in compliance with technical standards EN 55013 A12 8 1994 and EN 55020 12 1994 po Steen Michaelsen Infinity Systems A S Birker d DENMARK 3 97 TABLE OF CONTENTS AWG MTs eit elevate RR E A 3 SYSTEM EX DENSI ON Eriein EEA 4 Precautions And NOTES iicn ne oiai noan 5 IST 6 TCO UD FESO ritiro 8 APPLICATIONS For your convenience we ve included several application diagrams to help you plan your own system installation Figures 1 through 3 show how to config
6. control to the frequency recommended by speaker manufacturer refer to Figure 8 If the value is unknown set the control midway QV G Di Iy 25V N 32Hz H 2047 V MT F 60 BR 0 DI R Hz R D E 320Hz 80Hz D GP o eHP M 0 B e FLAT PM I MIN 0 LP og HP UW D Q e FLAT X MAX Figure8 Kappa 202a controls for crossover input output and DBO Dynamic Bass Optimizer 2 Depending on your system plan set the AMP and AUX switches to LP low pass HP high pass or FLAT refer to Figure 8 SETTING INPUT SENSITIVITY Initially turn the input sensitivity GAIN control to its minimum counter clockwise position refer to Figure 8 1 Reconnect the negative lead to your vehicle s battery Apply power to the audio system and play a favorite music track from CD or tape NOTE After the source unit is on green LEDs on thetop pane will illuminate indicating the amplifier is on If not check the wiring especially the remote connection from the source unit Also refer to Troubleshooting on the next page 2 On the source unit increase the volume control to maximum position Slowly increase the GAIN control clockwise towards three o clock and at the same time listen to the quality of the reproduced sound At some point you ll hear distortion on the music peaks Stop the adjustment and turn it back slightly SETTING DBO Dynamic Bass Optimizer DBO is a new approach to enhancing l
7. e FLAT Pf 2 7 H i l LP afi I Hp UM e FLAT X nd 4 Infinity Kappa 202a Power Amplifier ia AND NOTES The Kappa 202a has five levels of circuit protection that monitor the amplifier and will shut it down if the electrical system voltage drops below 10 Vdc or exceeds 15 5 Vdc temperatures are above 194 F 90 C short circuits occur or current draw exceeds product specifications For best performance check the intended mounting site to make sure the operating environment does not create conditions that will trigger circuit protection Prior to installation turn off all audio systems and other electrical devices Also disconnect the negative lead from the vehicle s battery At the installation site locate and make a note of all fuel lines hydraulic brake lines and electrical wiring Use extreme caution when cutting or drilling in and around these areas Use the amplifier as a mounting template to mark locations for the mounting holes Check dearances on both sides of a planned mounting surface before drilling any holes or installing any screws Remember that mounting screws can extend up to an inch behind the surface fe 7 AUDIO Cables Always wear protective eyewear when using tools The Kappa 202a uses gold plated industrial grade Weco plug in connectors for power and speaker wiring Because of precision
8. iliary outputs e An amplifier input sensitivity control to match a wide range of input signal levels from 250 mV to 9 V e Separate power supplies for each channel e Five protection levels guard against over voltage under voltage over power over temperature and over current situations e 2 color LED array indicates green when power is on and orange when protection is activated e Industrial grade gold plated pre wire and plug in connectors for an easy to install high quality interface e Transparent control cover to deter tampering yet provide a clear view of installation settings e Built in automotive type fuses to protect the amplifier e Unibloc chassis provides improved heat sink capacity and exceptional RFI shielding characteristics Agout THE WARRANTY You ve selected a premium product that offers superior performance and advanced materials resulting from over 25 years of car audio design This Infinity product is made with our ongoing dedication to creating the best consumer audio products possible As a result you can expect your new Kappa Power Amplifier to provide you with many years of listening enjoyment 2 Infinity Kappa 202a Power Amplifier All Infinity Automotive Products carry a limited parts and labor warranty see the enclosed warranty card so retain the bill of sale to protect your purchase and to aid us with any service related questions you may have Agout THIS MANUAL To attain m
9. n Depending on your total system plan allow for adequate time and the possibility of overnight storage of your vehicle since it may take more than one day to complete the installation PARTS LIST Examine and verify that the package includes the following items 1 Kappa 202a Power Amplifier 2 Spare ATC fast blow fuses 40 A a 1 Control cover with 2 machine screws 1 Weco 5 pin audio connector 1 Weco 2 pin power connector 4 8 mounting screws MOUNTING THE AMPLIFIER The Kappa 202a can be mounted in virtually any location inside the vehicle However make sure to keep the amplifier away from heater vents or ducts 1 At the chosen site use the amplifier as a mounting template and mark locations of the four mounting holes 2 Drill a small pilot hole at each marked location 3 Mount the amplifier and securely tighten the mounting screws WIRING THE AMPLIFIER Refer to Figure 7 below for details of the Kappa 202a s front and rear panel connections 1 For power remote and speaker wires strip 1 4 off one end of each jacket to reveal bare wire for insertion into the Weco connectors 2 Using the Weco 2 pin power connectors connect individual black wires from the nearest bare metal chassis component to each terminal Then connect individual red wires from the vehicle s 12 volt battery terminal to each terminal Kappa 202a MADE IN THE USA CE
10. ow frequency reproduction in a vehicle Conventional bass boost controls add bass at a fixed frequency and cause the amplifier to consume considerable power DBO conserves valuable power at the lowest frequencies and allows you to adjust the level and character of the bass sound instead of just the amount of boom Since a subwoofer in a tuned box is given to overexcursion below the tuned frequency set the FREQ control below the box s resonant tuned frequency see Figure 9 on the next page Power typically wasted in this region will now be conserved and instead be available for frequencies the enclosure will reproduce Use the Q control to boost the bass at the set frequency by as much as 12 dB at MAX position see Figure 9 on the next page For sealed enclosures use DBO to enhance the output so it sounds more like a tuned box This is a result of 12 dB of rolloff being added to the enclosure s rolloff and a flattening of frequency response at the curve s knee when Q is boosted For infinite baffles set the FREQ control to the speaker s F value to keep the subwoofer from trying to create bass below the resonant frequency and adjust the Q control according to personal taste INSTALLING THE CONTROL COVER After wiring and testing the Kappa 202a amplifier install the control cover using the enclosed machine screws to deter tampering and help seal out dust NOTE Do not over tighten the machine screws Doing so may
11. page 3 20Hz MIN DBO FREQ Control 3 DBO Q Control adjusts cut off E adjusts boost amount l a at cut off frequency MAX frequency 80Hz Power Output Bridged 4 ohms 600 watts a II a i a Sensitivity LA ne RT ee julia sno lt lt een Licio Dimensions wxhx1 19 2 X 23 6 x 81 2 in 495 3 x 55 6 x 215 9 mm dB dB 0 12 3 6 6 0 9 6 aS 20 80 Freq Hz nie 20 80 Freq Hz Figure 9 Frequency response curves show range of Kappa 202a DBO controls Jo Infinity 1996 Infinity Systems Inc 20630 Nordhoff Street Chatsworth CA 91311 USA VOICE 818 407 0228 FAX 818 709 9486 www infinitysystems com Infinity constantly strives to update and improve existing products as wal as create new ones therefore the specifications and construction details in this and related Infinity publications are subject to change without notice Dynamic Bass Optimizer and Unibloc are trademarks of Infinity Systems Inc Weco is a registered trademark of Weco Inc 8 Infinity Kappa 202a Power Amplifier P N SH1104 Rev 3
12. tolerances do not insert the connectors into the amplifier without pre wiring them first Once the wires are fastened in each shell they provide additional gripping area for easy connector removal When routing cables keep input signal cables away from power cables and output speaker wires as shown in Figure 6 below When making connections make sure that each connection is clean and properly secured Observe the polarity markings on the rear panel Refer to the application drawings Figures 1 through 3 on page 3 to set up the amplifier for operation in stereo bridged mono bi amp or tri mode configurations If the amplifier s fuse needs replacement use only the same rating and type as a replacement Do not substitute another kind SPEAKER Cables Chassis Unit Ground TE uses Battery Chassis Kappa 202a Amplifier Ground zu Chassis Ground POWER and REMOTE Cables Figure 6 To minimize possible noise pickup usethis suggested cable routing schemeto plan your amplifier installation Owner s Manual Installation Guide 5 INSTALLATION The Kappa 202a is easy to install For optimum performance we recommend using high quality twisted pair shielded RCA audio cables and 14 gauge or larger speaker wire Also you ll need a minimum of 12 gauge stranded copper wire e g red and black jackets for the power connections Use 18 gauge e g blue jacket wire for remote turn o
13. ure the Kappa 202a for stereo bridged mono and tri mode operation Figure 1 This wiring diagram shows a Kappa 202a amplifier set to stereo to drive a pair of full range speakers Figure 2 This wiring diagram shows a Kappa 202a amplifier se to bridge mono to drivea single subwoofer Figure 3 This wiring diagram shows a Kappa 202a amplifier s amp for tri mode operation For a desired crossover frequency usethe chart to sd et a low pass inductor for the sub woofer and corresponding high pass capacitors for left and right speakers For system expansion ideas see the next page NOTE For simplicity Figures 1 through 3 do not show power remote and input connections Set Mode Switch To STEREO on top panel E BR e ST Set Filter Switches To FLAT on top panel AW LP i a e FLAT P l LP i ul FLAT X Set Mode Switch To BRIDGE on top panel Ee e ST Set Filter Switches on top a LP ite HP e FLAT P 0 H Subwoofer LP af i ul FLAT X Set Mode Switch To STEREO on top panel g BR e ST Set Filter Switches To FLAT on top gt KAPPA 202a rear panel GC lela Kb KAPPA 202a rear panel KAPPA 202a rear panel FREQUENCY INDUCTOR CAPACITOR Crossover 6 dB oct LP 6 dB oct HP 4 ohm 4 ohm 75Hz 80 mH 530 UF 100 Hz 6 4mH 400 uF 125 Hz 5 0 mH 318 UF 150Hz 4 2mH 265 UF 175 Hz 3 6 mH 227 UF 200 Hz 3 2 mH 198
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