Precision Power A100 User's Manual
Contents
1. PPI highly recommends that this amplifier end or any other mobile audio equipment be instaled by a trained professional Tools i Parts Needed for Installation not supplied Small flat blade ccrewdriver Phillips screwdriver Wre cutters Wire strippers Soblering iron Solder Flux cleaner 5 washers 4 88 and 1 28 shest metal ecrews 2 fing connectors Inline fuse holler and fuse Speaker wire 16 gauge or larger Power and Ground wirs 12 gauge or larger Heatshrink Grommets Silicone cr similar material Mounting To prevent damage to the amplifier while driving mount it in a secure place Choosing the appropriate location will depend upon your vehicle and the complexity of your system design it may be mounted in any compatible space that is convenient to your needs and provides suficient airflow Adequate ventilation allows the amplifier to dissipate the heat that develops during operation Inadequate ventilation may result in overheating The thermal protection circu will engage when the heatsink temperature reaches 75 degrees Celsius The amplifier wil automatically return to normal operation once the heatsinkcools Typical mounting locations include trunk and pessenger compartment floor or under seat Never mount the amplifier in a location which would subject it to immarsion or 11 The Art Series uniquely shaped heatsink is designed for high efficiency cooling but improper mounting may compromise its ability to cool Whe2. PWM supply offers high efficiency This efficiency translates into cooler operation The hostile environment of mobile audio presents a real problem for an amplifier to operate properly When an amplifier is running it develops heat It is the job of the heatsink to pull this heat away from the internal components If the heatsink gets too hot the amplifier will modify its operation to protect itself from damage The amplifier s ability to maintain a proper operating temperature is oftentimes aggravated by the conditions ambient air temperature mounting location playing level duration of operation as well as the load impedance presented by the auto sound environment The Art Series PWM power supply s high efficiency means lower operating temperatures and a higher tolerance for thermal control The temperature protection circuit will engage at 75 degrees Celsius Heatsink Design To understand why PPI created this unique heatsink design it s important to understand what purpose a heatsink serves and how it works When an amplifier operates the internal components develop heat This heat must be transferred away from the components for them to operate properly By securing the components to the underside of the heatsink the process of conduction transfers the heat from the components to the heatsink The heatsink in turn must dissipate this heat or become too hot for the internal components to operate properly The heat can be transferred
3. noise performance from a high quality mobile sound system it is desirable to use high signal levels wherever possible in the interconnection cables High signal levels will reduce the effect of induced noise The peak level of an audio signal is usually determined by the clipping level of electronic components The following procedure should be used as a guide when the system installation is complete Adjusting Equalizer Input Gains 1 Turn the equalizer s volume control to minimum 2 Turn the source unit volume 1 2 to 3 4 of maximum If available on your unit set the output level to maximum Some units may have a switch 3 If available set selector switch to either input 1 or input 2 4 Adjust all equalizer input gains to minimum 5 For the chosen input play the respective music source A loud music passage is desired 6 For the chosen input increase the left input gain control until the onset of audible distortion Then decrease the gain prior to the immediate point of audible distortion This setting will minimize system background noise and prevents overloading of the equalizer Adjust for the same input the right input gain control for proper left right balance 7 Set selector switch to the alternative source unit if used and repeat steps 5 and 6 8 Adjust crossover next 15 Adjusting Crossover Input Gains Adjust all crossover gain controls to O dB 1 2 of maximum sensitivity Adjust all amplifier gains to 1
4. 2 of maximum sensitivity Turn the volume knob on the equalizer to a maximum of 3 o clock Increase the gain of the crossover until the onset of audible distortion Then decrease the gain prior to the immediate point of audible distortion This setting will minimize system background noise and prevents overloading of the crossover 5 Repeat step 4 for any remaining crossovers in the system 6 Adjust the input gains next RON NOTE In many multi crossover accessory systems the gain of some crossover and accessories may need to be further decreased to achieve proportional balance Adjusting the Amplifier s input Gain Adjust the amplifier s input gain to 1 2 maximum sensitivity Turn the volume knob on the equalizer to a maximum of 3 o clock Increase the gain clockwise until the onset of audible distortion Then decrease the gain counterclockwise prior to the immediate point of audible distortion This setting will minimize system background noise and prevents overloading of the amplifier Repeat step 3 for any remaining amplifiers in the system NOTE Depending on the sensitivity of the systems preamp s the gain of the amplifier s may not need adjustments Also in many multi amplifier systems the gain of some amplifiers may need to be further decreased to achieve proportional balance 16 TROUBLESHOOTING If for some reason your system fails to operate properly please refer to this guide If you are unable to resolve t
5. Art Series A100 A200 A300 A600 A1200 Owners Manual 3 3 os Z PrecisionPower PrecisionPower 7402 W Detroit St Suite 180 E Mut Aate f the At F Chandler AZ USA 1 800 62 POWER PrecisionPower Absolutely Hate of thee Art Mobile Audio Electronics oli CONGRATULATIONS AND THANK YOU for your choice of a PrecisionPower Inc high performance mobile audio amplifier PrecisionPower is proud to be a world leader specializing in the design engineering and manufacture of State of the Art mobile audio electronics Our success is derived from the fact that we do not incorporate gadgets or passing fads into our products Sound engineering practice combined with deceptively simple yet highly effective circuit designs characterize every PPI product Yet our demand for maximum value dictates that every ounce of fat be trimmed if it does not contribute to sound quality or reliability This is why PPI products have consistently enjoyed an unparalleled reputation for sound value We are sure that your new Art Series amplifier will provide you the State of the Art in mobile audio amplification Important Safeguards The following list of Important Safeguards has been compiled to help you achieve optimum satisfaction and the highest quality performance from your new mobile audio amplifier Please take the time to review these safeguards before operation and or installation of your new Art Series amplifier Read In
6. and equalizers The paralleling of these inputs allow the daisy chaining of input source to other amplifiers or accessories Connect your source unit to these inputs Gain Control On the left end panel next to the inputs is the gain control This control adjusts the level of the input signal of your source unit This control requires a small flat blade screwdriver for adjustment Upon installation of the amplifier the gain control must be adjusted This can be done by first turning the gain all the way down counter clockwise Turn the volume on the source unit up two thirds Then adjust the gain control until the desired volume is obtained without audible distortion Low Impedance Indicator AM II circuitry will lower output power to maintain uninterrupted operation whenever the amplifier senses an impedance load of less than 2 Ohms The Low Impedance Indicator left side end panel is provided to let you know when the amplifier is operating in this mode It is important to note that there is no increase in output power below the 2 Ohm threshold Maximum power is achieved at 2 Ohms In the case of a short circuit AM II will engage to protect the shorted channel but will continue to play the unaffected channel When this occurs audible distortion will be heard Turn off the system and repair the short Once the problem has been repaired the amplifier will return to normal operation System Tuning In order to achieve maximum signal to
7. are provided AM II Bridging Gain L E D Load Impedance Mixed Mono PVVM Remote Turn On Adaptive MOSFET ll is an advanced protection circuit designed to prevent amplifier shut off due to low load imped ance AM Il optimizes output power to maintain uninterrupted operation whenever the amplifier senses a load impedance of less than two Ohms An L E D signals when AM Il is working Combining two amplifier channels into one channel typically used to create a mono output The ratio of output voltage to input voltage The gain control allows adjustment to the amplifier s output level for varying input levels Light Emitting Diode Indicates power on off and when AM II is working Measurement of speaker s resistance reactance that the amplifier must drive The amplifier s ability to play the Left and Right Stereo channels while playing a third bridged mono channel Pulse Width Modulated power supply Our PWM maintains a regulated output voltage and a high conversion efficiency over the input supply range of 11 15 VDC The result is less demand on the battery lower amplifier operating temperature and extremely accurate low frequency reproduction Low current automatic switching circuit that turns the amplifier on and off Typically connected to the remote antenna or amp turn on lead of most car radios cassette or CD players Features A 100 A200 A300 A600 A1200 Pulse Width Modulate
8. d PWM Switching Power Supply for High Efficiency Regulated Power Supply Provides Full Rated Power from 11 15 VDC Discrete Power Amp Circuitry Internally Bridgeable Mixed Stereo Mono Operation Output Short Circuit Protection Low Impedance Protection with Diagnostic L E D Adjustable Input Sensitivity 2 Gold RCA and DIN Input Connectors PPI s Exclusive Wire Connection System Three Year Limited Warranty Manufactured in the U S A Art Series Model Technical Specifications Continuous Power Output per Channel 4 Ohms 11 15 VDC Stereo 2 Ohms 11 15 VDC Stereo 4 Ohms 11 15 VDC Bridged Power Fuse Dimensions inches Shipping Weight Power Bandwidth A100 A200 A300 A600 25 Watts 50 Watts 75 Watts 150 Watts 50 Watts 100 Watts 150 Watts 300 Watts 100 Watts 200 Watts 300 Watts 600 Watts 20 Amp 20 Amp 30 Amp 40 Amp 2x9 25x6 2x9 25x8 5 2X9 25x10 67 2x9 25x12 6 Ibs 7 Ibs 8 Ibs 9 Ibs Common Specifications Total Harmonic Distortion Input Sensitivity Input Impedance Load Impedance Stereo Load Impedance Bridged Supply Voltage A1200 300 Watts 600 Watts 1200 Watts 100 Amp 2x9 25x24 14 Ibs 10 Hz 50 kHz 02 2 2 5V 10k Ohms 2 8 Ohms 4 8 Ohms 11 15 Volts About your New Art Series Amplifier As a world leader in the design and manufacture of high performance mobile amplifiers PrecisionPovver Inc s commitment to being Absolutely Star
9. e battery Cut off excess wire and using wire strippers strip the power and ground cables 114 inch Locate the power and ground connector supplied On the under side of the connector are two slotted screws With a small flat bladed screw driver loosen these screws before attempting to insert the cables After you have inserted the bared end of each cable into the connector secure it by tightening the associated screw If inserting larger gauge wire presents a problem tinning the wire with solder may help Be sure each connection is tight Once the wires are secure the connector may be plugged into the amplifier Please Note the power ground connector is keyed to a slot in the end panel and can only be inserted one way with the head of the fastening screws pointing down Refer to Figure B Remote Turn On In order for the amplifier to turn on a remote turn on wire must be connected to a switched 12 volt source Typically the source unit provides a power antenna remote turn on lead which will turn on the amplifier when the source unit is activated If this is unavailable a switched 12 volt source must be used Run a wire from the amplifier location through the vehicle to the switched 12 Volt source Observe the same precautions for routing this cable that you followed for running the power cable Cut off excess wire and using wire strippers strip the wire 114 inch Locate the five wire connector which we will refer to as the speak
10. e can result The fuse at the battery should be of the same value as the chassis fuse located on the right hand end panel of the amplifier Consult your Authorized PPI Dealer for an appropriate in line fuse holder that meets the needs of your installation We suggest crimping and soldering all wire connections Insulate the connection with heat shrink to prevent a short to ground The ground wire should be of the same gauge as the power wire As a rule of thumb use as short a length of wire as possible Locate an area near the amplifier that is metal the floor is ideal and clean an area about the size of a quarter to bare metal Drill a pilot hole in the middle of this area Be Careful Inspect the area under Fastening Screws Connect to amplifier Power wires Figure B Power Ground Connector 12 neath to be sure you aren t drilling into wires brake or fuel lines etc Terminate the wire with a ring connector and attach it to the bare metal using a 8 sheet metal screw and washer not supplied We suggest crimping and soldering this connection Insulate the connection with heat shrink It is important that this connection be solid After the connection is complete coat the area with silicone or some similar material to prevent rust from developing Once you have run both the power and ground wires it s time to connect the cable to the amplifier Be sure that you have not reconnected the ground cable to the negative post of th
11. el for a subwoofer or center channel Also bridging adds flexibility of operation Any of the Art Series tvvo channel amplifiers can be used in a one channel mono tvvo channels stereo or 3 channels 2 channels stereo and one channel mono configuration Deriving the mono channel is accomplished by using the left channel positive wire as the positive speaker wire and the right channel negative wire as the negative speaker wire It is important that a minimum 4 Ohm impedance is observed If the impedance drops below 4 Ohms while the amplifier is wired in the mono configuration the AM H protection circuit will engage Speaker Connector S Speaker Negative P Speaker Positive Remote Turn On Speaker Positive Speaker Negative Figure C Speaker l Remote Turn On Connector The ability to run stereo satellites while simultaneously running a mono output from the same output stage is accomplished simply by running the stereo speakers normally and tapping into the appropriate wires for the Mixed Mono channel left channel positive wire as the positive speaker wire and the right channel negative wire as the negative speaker wire Again speaker impedance should be 2 Ohms on the stereo channels and 4 Ohms on the mono channel Inputs On the left side panel of the two channel Art Series amplifiers are a set of RCA jacks A DIN jack is paralleled to the RCA input and can be used to Phantom Power other PPI accessories such as our crossovers
12. er remote turn on connector On the underside of the connector are five slotted screws Loosen the middle screw before attempting to insert the remote turn on lead into the end of the connector After the wire is inserted secure it by tightening the associated screw If inserting larger gauge wire presents a problem tinning the wire with solder may help Be sure the connection is tight You are now ready to connect the speakers Refer to Figure C Speaker Connection Run the speaker wires from the amplifier location through the vehicle to the speakers Observe the same precautions for routing these wires that you followed for running the power and remote turn on cables It is important to use 16 gauge or larger wire for proper signal transfer Cut off excess and using wire strippers strip 114 inch Once again locate the speaker remote turn on connector Loosen the four remaining screws on the underside of the connector Insert the speaker leads one at a time into the end of the connector Check to make sure you ve maintained proper 13 polarity before securing each wire If inserting larger gauge wire presents a problem tinning the vvire vvith solder may help Be sure the connection is tight The connector may be plugged into the amplifier Refer to Figure C Bridging All Art Series amplifiers are capable of being bridged into a mono output due to the internal design of the amplifier This feature permits the creation of a mono chann
13. es amplifiers will require non supplied installation accessories Please refer to the Installation Section of this manual for a list of requirements or consult your Authorized PPI dealer before installation Water and Moisture Never mount your Art Series amplifier in a location which would subject it to immersion or exposure to water Servicing Do not attempt to service this amplifier yourself Opening or removing covers will void your warranty For service information consult your Authorized PPI dealer or call PrecisionPower Inc at 1 800 62 POWER Our customer service representatives are available Monday through Friday from 8am to 5pm Mountain Standard Time Caution The use of a high powered audio system may cause hearing loss or damage While PPI systems are capable of Concert level volumes with incredible accuracy they are designed for you to enjoy the subtleties created by musicians while listening at reasonable sound pressure levels The use of a high powered audio system may impair your ability to hear traffic sounds and therefore may constitute a traffic hazard We advise lower volume levels while driving Table of Contents Glossary of Terms Features Specifications About Your Art Series Amplifier Installation System Tuning Troubleshooting System Designs Limited Warranty 11 15 17 18 20 Glossary The following terms are used in this manual Since they may be unfamiliar the following definitions
14. et the emplfers performance over the musical spectrum wi be fawiess The Art Saries amplifiers are capable of operation into a two Ohm load in a stereo configuration and a four Ohm load in a bridged mono However for optimum performances four Ohm load in stareo and an eight Ohm load in mono are recommended Refar to the Section on System Design for more information PPI s Exclusive Wire Connection System Over the years advances in mobile audio electronics have changed the demands placed on the type and size of wire needed to create a high performance moble system To meet this need PPI has created an exclusive wire connection system This unique removable connection system offers the versatility of terminal strips the convenience of quick connect disconnect style connectors and the reliability afforded by direct connection to the circuit board The power and ground connector will accept cable up to 6 gauge in size onde ar nel ela Baena ah d to 10 gauge in size Refer to the Section on Installation for more information Fusing The Art Series amplifier is protected from current over load situations by blade fuse Maxi Fuse This type of fuse has a number of advantages First amp s available in higher values and s single element design is more effective than using two fuses of lower value Second we could board mount it This eliminates the use of Jumpenyires from the end panal to the circuit board which improves reliabili
15. from the heatsink by three different processes Conduction Radiation or Convection Conduction is defined as the process by which heat is transferred through matter without transfer of the matter itself A practical example of this would be the cooling system in your car which circulates a liquid matter in order to transfer the heat away from your engine In the mobile environment conduction is not the primary process of transferring heat from the heatsink The use of a circulating liquid or gas is impractical unless specific provisions were made in the design of a heatsink to accomodate this type of transfer There is nothing in the vehicle which could easily be used to heatsink the heatsink Air is the only practical conductive heat transfer medium involved when you install an amplifier in your car As we will discuss later heat radiated by the heatsink is conducted out into the environment triggering the process of convection Radiation is defined as the process of giving out light heat or other radiant energy An example of this process would be the sun It radiates heat light and other radiant energy Radiation is the primary process of heat transfer for a heatsink As the conducted heat builds from the internal components it radiates from the surface out into the surrounding environment The amount of heat radiated by the heatsink is determined by its surface area The traditional way to add surface area is to use fins expa
16. he problem consult your Authorized PPI Dealer or call 1 800 62 POWER NO SOUND Is the power LED illuminated Check fuses in power wire Be sure turn on lead is connected NO SOUND IN ONE CHANNEL Check speaker leads and inspect for a short to ground or an open connection Check pre amp leads Reverse left and right leads to see if the problem is before the amplifier Check Mono Bridge and Bi Amp crossover switches on other units prior to the amp If the problem is in the amp have your Dealer inspect the unit AMP TURNING OFF Is the amp able to cool properly Check speakers for shorts or damage Make sure power and ground are secure Have PPI Dealer inspect amp 17 System Designs Two Channels Stereo Source Unit Bi Amp Design Mixed Mono Two Channels Stereo One Channel Mono Sources Unit
17. n mounting the amplifier in a confined space i e under care must be tahen to ensure that at least tvvo inches of clearance is provided around the amplifier If the amplifier is located in an area which has restricted air flow or is totally enclosed a fan may be used to improve air circulation Power and Ground Before beginning disconnect the negative terminal of the battery before working on the positive terminal to prevent a short to ground Reconnect the negative terminal only after all connections have been made The Art Series amplifiers are designed to operate from a car s positive 12 volt negative ground electrical system PPI recommends that the power and ground cables be a minimum of 6 gauge for the A1200 10 gauge for the A300 amp A600 and 12 gauge for the A100 amp A200 Depending upon the complexity of your system larger gauge wire may be needed PPl s Exclusive Wire Connection System will accept up to 6 gauge cable The main power cable should run from the amplifier location through the vehicle to the battery avoiding sharp comers creases and sharp body parts When passing through any metal wall i e fire wall etc a grommet must be used to prevent the wire from chaffing and shorting to ground For safety reasons PPI recommends that the power cable be fused at the positive terminal of the battery If this fuse is not installed and the power wire shorts to ground between the battery and the amplifier a fir
18. nding the radiating surface without increasing the overall dimensions of the amplifier So why doesn t the Art Series heatsink employ the traditional use of fins since it must adhere to the same rules of thermodynamics that all other heatsinks do We must discuss the third process convection before the answer will become clear Convection is defined as the transfer of heat from one place to another by the movement of heated particles of a gas or liquid An example of this process would be warming your hand by holding it in the hot air rising from an oven When an amplifier s heatsink becomes warm it conducts heat out into the surrounding environment warming the air The warm air begins to rise creating air currents which draw heat away from the heatsink With a traditional finned heatsink this process is most effective when the amplifier is mounted on its vertical axis As with chimney the air circulates upward over the fins improving the heat transfer process Your ability to take advantage of convection is limited by the installation constraints imposed by the mobile environment Mounting an amplifier on the vertical axis is not always possible and generally not preferred by the consumer The amplifier s heatsink is left with only one primary process for heat transfer radiation Engineers have recognized the importance of radiant surface area but the constraints of the automotive environment have forced heatsink designs to remain c
19. ompact In order to improve radiating efficiency designers have simply added more fins With limited space adding more fins means that they get closer together What PPl s engineers observed was that fins in close proximity radiate heat from fin to fin rather than into the environment If convection is not available to draw the heat out from between the fins the heat becomes trapped causing a reduction in radiant heat transfer efficiency The Art Series heatsink addresses this problem and improves radiant heat transfer efficiency by providing more effective radiating surface area Combined with our highly efficient less wasted energy in the form of heat PWM power supply the result is an amplifier with improved thermal capabilities As with any amplifier care must be taken when selecting a mounting location There must be two inches of air space around the heatsink for proper heat dissipation to take place If mounting in an enclosed area a fan may be added to improve heat transfer Refer to the Section on Installation for more information AM II Protection Circuitry Watts 100 All Art Series amplifiers utilize a highly efficient Pulse Width Modulated power supply This means the amplifier will continue to operate within regulation until the battery voltage drops below 11 volts 24 or the heatsink temperature reaches 75 degrees Celsius This new power supply also Ohms incorporates the second 8 4 2 1 0 5 generation of PPl
20. s Adaptive Figure A AMII Protection Circuitry MOSFET protection circuitry Output Power Ve impedance This advanced protection circuit was developed to prevent shut off due to the fluctuating impedance loads presented by today s complex speaker systems The adaptive circuit optimizes output power to maintain uninterrupted operation whenever the amplifier senses an impedance load of less than 2 Ohms A low impedance indicator Diagnostic L E D is provided to let you know when the amplifier is operating in this mode It is important to note that there is no increase in output power below the 2 Ohm threshold Maximum power is achieved at 2 Ohms AM II provides you the satisfaction of knowing that your Art Series amplifier will continue to play when momentary impedance dips occur Refer to figure A 50 In the case of a short circuit AM II will engage to protect the shorted channel but will continue to play the unaffected channel When this occurs audible distortion will be heard Turn off the system and repair the short Once the problem has been repaired the amplifier will return to normal operation Exclusive use of discrete output transistors results in increased conic transparency outstanding ic range and high instantaneous current capab ity We ve designed the power bandwidth to be from 10Hz to 50 000Hz i dE This ability to produce full power with linear frequency response well beyond the threshold of human hearing insures th
21. structions We all have a tendency to read instructions only after something doesn t work as anticipated This manual provides specific information concerning the operation and installation of your new amplifier Please read this manual thoroughly and retain it for future reference Keep Your Sales Receipt Your PPI amplifier has a three year limited warranty when it is installed by an Authorized PPI dealer Non Authorized dealer installed PPI amplifiers carry a one year parts ninety days labor limited warranty To establish the starting date of warranty coverage a copy of your sales receipt must accompany your amplifier for all warranty service Please file your sales receipt away for future reference For your convenience a complete limited warranty statement is located at the back of this manual Follow Instructions All use and installation instructions should be followed to assure proper operation of your new Art Series amplifier Heed All Wiring Requirements A high performance amplifier requires minimum wire gauges be used for the Power Ground Remote Tum On and Speaker cables To assure proper operation of your Art Series amplifier following all wiring requirements Heed all Fusing Requirements The fusing requirements of your Art Series amplifier have been established for its continued safe operation Replacement with a higher value fuse may result in damage and voiding of warranty Installation Accessories The Art Seri
22. t of the Art demands that we create products that offer high reliability and superior sound quality To do this we must recognize and find solutions to the unique problems which affect the performance of electronics in the mobile environment At PPI we build upon experience We currently design and manufacture over 20 different amplifiers Each is designed to be application specific either in rated power number of channels or with integrated accessories This large reservoir of knowledge has provided us with the innovative design solutions incorporated in the Art Series Amplifiers As you review this section keep in mind that the new features found in the Art Series amplifiers directly influence their performance and therefore must be understood before operation and or installation Please take a few minutes to review the following information The user benefit and operational parameters of the hey design features are detailed below Pulse Width Modulated PWM Switching Power Supply The voltage supplied by an automobile s electrical system will vary depending upon the number of accessories you are using As you turn on off various accessories head lights air conditioner rear window defroster power windows etc the voltage that your car s electrical system is providing will change according to the demand The Art Series fully regulated power supply guarantees rated spec over a wide range of voltages 11 VDC to 15 VDC Our
23. ty Finally they are readily avaiable from any auto supply store and are easy to service The A100 amp A200 use a 20 Amp fuse the A300 a 30 Amp fuse the A800 a 50 Amp fuse and the A1200 2 60 Amp fuses For safety reasons PPI recommande that the power cable be fused at the postive terminal of the battery If this fuse not supplied is not installed and the power wire shorts to ground between the battery and the amplifier a fre can result The fuse at the battery should be of the same value as the fuse supplied with the amplifier Consult your Authorized PP Dealer for an appropriate in line fuse that maets the needs of your installation 10 Installation PRIOR TO INSTALLATION of your new Art Sees emp Ser it is important to consider the folowing In your profession your abilities and expertise insure a job wel done Trained professional car audio installers ere no different It s their chosen profession end what they do best PPI bafeves co strongly in its responsibilty ib you thet we invest heavily in the hands on training of professional installare Our comprehensive system design end instalation seminer provides our authowized dealers with the latast techniques to deal with the complexities of car audio bday There is more then meets the eye to ensure that a car stereo reaches its Kullast potential The trained professionel through experience can approach recognize and address af the needs of the mobile audio environment
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