AudioControl EQX Car Audio Amplifier
Contents
1. M Figure 3 Wiring diagram for EQX ina bi amplified system Amplifier Woofer ti Main Lag zx o Concert Series Owner s Manual ornen K Amplifier Speakers Figure 4 Wiring diagram shows an EQX in a Figure 5 on opposite page Wiring diagram shows single amplifier system using a deck and The an EQX in a bi amplified system with an Model 11 EPICENTER Amplified Center Channel Image Processor Head Unit Remote O M J Model 11 Installation Amplifier Amplifier tf Center Speaker Sub Woofers Main Speakers WARNING Before installation turn off the power to the head unit or radio and discon nect the negative lead of your vehicle s battery Mounting the EQX 1 Select a permanent mounting site for the EQX Make sure you observe the Installation Precautions listed on page 8 2 Position the unit and use either a felt tip pen or spring loaded center2. Highpass Lowpass L Highpass R L Lowpass R Input Maximized 2 Volt Output 12 08S019 21u01322 3 2 e320 gpyZ KeA Z jezijenb3 s1ydes5 YIpimpueg enq Lowpass Mono Inverted Power o Remote Ground 12 C O Description We ve created the EQX Equalizer Crossover Level Matcher to make any system sound better This Performance Match Component features straightforward connections and easy to adjust equalizer and level controls To learn more read on Equalizer and Input Output Level Controls and Indicators The top panel contains all equalizer controls input output controls and system indicators The equalizer controls are grouped by channels in ascending frequencies from left to right as shown in Figure 1 on the opposite page Each equalizer control provides 12 dB of boost and cut for each channel The Input Gain con trols allow you to adjust the Left or Right input gain over a range of 18 dB Output attenuators provide up to 30 dB of gain trim for each of the Our line of Performance Match Components takes the guess work out of creating the best sounding system by matching autosound components to your vehicle For more information see page 22 Full Range High Pass or Low Pass outputs The top panel also includes several indicators to confirm power and help set output levels HALF OCTAVE BASS EQUALIZER six half octave bass equalizer controls for each cha
3. ok OK OKAY We ll make a deal with you Send us Fig ure 8 Removing O BYPASS ten bucks and we ll send you the whole set of Tech Papers which includes our Technical Note 1005 Crossovers Modules the top p anel lets O And you won t have read another tiny footnote unless you you access internal VISUM crossover and PFM modules Making Modules 1 Turn the system power off Troubleshooting 2 Remove the top panel and locate the cross EP over or Performance Frequency Match 1 If you hear a buzz or whine you may module as shown in Figure 8 on the oppo havea grounding A de all ir site page connections and cables Are all components in the system routed to a common ground 3 Change the appropriate module point Does the head unit have a clean 4 Replace the top panel and tighten the ground The factory wire harness doesn t screws count 5 Turn the system power on 2 Ifthe condition still exists turn the system off and remove the top panel of the EOX refer to Figure 8 Locate the GROUND SELECTOR and switch it to a different position 3 Apply power and listen If the condition still exists you ve got bigger problems You ll need to contact an authorized AudioControl dealer to solve this issue Unabashed Plug In addition to the EQX we manufacture a unique line of high quality Performance Match Components all designed to work together to give you the best sounding system regardless o
4. Conditional doesn t mean anything ominous The Federal Trade Commission tells all manu facturers to use the term to indicate that certain conditions have to be met before they ll honor the warranty If you honor these conditions we will warrant all materials and workmanship on your EQX for Five Years from the date you bought it if installed by an authorized Audio Control dealer and will fix or replace it at our option during that time For you do it yourselfers we will warrant your EQX for One year Here are the conditions that make this warranty conditional 1 You have to fill out the warranty card and send it to us within 15 days after you pur chase your EQX 2 You must keep your sales slip or receipt so you have proof when and from whom you bought your EQX We re not the only company to require this so it s a good habit to be in with any stereo purchase 3 Your EQX has to have been originally purchased from an authorized AudioControl dealer You do not have to be the original owner to take advantage of the warranty but the date of purchase is still important so be sure to get a copy of the sales slip from the original owner 4 You cannot let anybody who isn t a the AudioControl Factory b an authorized service center or c someone authorized in writing by AudioControl service your EQX If anyone other than a b or c messes with your EQX Series II that voids the warranty 5 The warra
5. playing at a comfortable level 9 Athird octave real time audio analyzer is the ultimate tool for getting the best sound quality from your new EOX If you are in a real hurry you can set the equalizer by ear Concert Series Owner s Manual 10 Listen to the vocals and instruments and 11 trying cutting the frequencies in the mid bass 90 to 250 Hz and mid range 2 to 4 kHz spectrum The mid bass response is usually a problem area due to standing waves caused by sound resonating in the passenger compartment The mid range frequencies are most sensitive to the ear and usually need to be brought down a bit Continue listening and try boosting the low bass frequencies in the 31 5 to 63 Hz area Usually this area needs help due to design limitations of smaller woofers and loss of bass in cassettes NOTE If the yellow OVERLOAD indicator comes on something is boosted too much Either bring down the suspect frequency control or adjust the INPUT GAIN controls to reduce the overall gain Installation 12 As a final check press the EQUALIZE switch OUT and IN to compare the sound without and with equalization Try different pro gram sources and make any final adjust ments Using a Real Time Audio Analyzer RTA For a really well balanced system we highly recommend using a Real Time Analyzer like the AudioControl SA 3055 to adjust your vehicle s sound system This tool is especially helpful in performing the init
6. EOX Concert Series EQUALIZER CROSSOVER LEVEL MATCHER OWNER S MANUAL AudioControl making good stereo sound better 22410 70th Ave W Mountlake Terrace WA 98043 Phone 425 775 8461 Fax 425 778 3166 www audiocontrol com Quick Installation Info Refer to Figures 3 through 5 pages 9 to 11 when installing the EQX Equalizer Crossover The unit is shipped from our factory with a 90 Hz crossover module already installed and the Programmable Frequency Match filter module set at 33 Hz see page 18 to change these For information on other system applications or related topics please read further Concert Series Owner s Manual Table of Contents Introduction vci 1 Description cccccsesseeeeeeeeeeeess 4 Installation eese 8 Amplifier Bridging 16 Making Your Own Crossover and Programmable Frequency Match Modules 18 Troubleshooting 21 Warranty aridi 23 Specifications 25 Introduction Congratulations You have purchased one of the most exciting and innovative audio products available for your car stereo system the AudioControl EQX Equalizer Crossover Level Matcher The EQX can make any system sound better Even if you have followed the true path of enlightenment and are having your new EQX professionally installed it doesn t hurt to read this manual There s nothing but rerun
7. Range Input P lt frt A i Output Input Equalizer PFM Filter a gt High Pass Gain Output Low Level on n RCA Input utpu 24dB Oct Crossover gt Mono Output Invert Output Bridging Adaptor Figure 10 Block diagram of the EQX Equalizer NOTE The Mono Output can be split with a Crossover Level Matcher Y cord if your amp needs dual mono inputs Specifications All specifications are measured at 14 4 Vdc stan dard automotive voltage Frequency Response 10 Hz to 20 kHz 1 dB Total Harmonic Distortion THD 0 00596 Signal to Noise Ratio SNR 110 dB at full output Maximum Output Level 9 5 volts rms Input Gain 18 dB Crossover Slope 24 dB per octave Crossover Type 2 way Linkwitz Riley Programmable Crossover Frequency 50 to 6500 Hz PFM Filter Slope PFM Frequency 18 dB per octave Programmable 15 to 100 Hz Transformer isolated switch mode Power Supply Fuse Rating 2 amps Size 125 h x 89 w x 69 d Weight 3 Ibs Balanced Input Yes Ground Isolation Jumpers Yes Country of origin USA Concert Series Owner s Manual AudioControl 1998 AudioControl is a division of Electronic Engineering and Manufacturing Inc All rights are reserved AudioControl Performance Match Making Good Stereo Sound Better EQX 4XS 2XS and The Epicenter are all trademarks of Electronic Engineering and Manufacturing Inc This manual was probably wri
8. f the type of vehicle you own These components have won so many awards the walls in our lobby are SAGGING The Master Volume Control MVC is the ultimate in high Signal to Noise design With your source unit all the way up it is at its maxi mum S N ratio not to mention approach ing its highest voltage out Pipe this hot clean signal down the line and control it with the MVC just prior to the signal s entry into the amps Concert Series Owner s Manual The Epicen ter is our patented bass restoration solution that will dramati cally add impact or depth to your sound system so you can really feel the bass The ESP 2 restores spaciousness to recordings to fill your vehicle with concert hall sound So visit an authorized AudioControl dealer and ask a salesperson about them AudioControl specializes in making good stereo sound better And Now A Word From Our Lawyers Warranty People are scared of warranties Lots of fine print Lots of noncooperation Months of wait ing around Well don t be scared of this war ranty It s designed to make you rave about us to your friends It s a warranty that looks out for you and helps you resist the temptation to have your friend who s good with electronics try to repair your AudioControl EQX So go ahead and read this warranty then enjoy your new com ponent for a few days before sending in the warranty card and comments
9. f all frequencies to inputs of an deck or factory stereo amplifier HIGH PASS OUTPUT RCA jacks for connec tion of high frequencies above the crossover point to the inputs of the mid high fre quency amplifier LOW PASS OUTPUT RCA jacks for connec tion of low frequencies below the crossover point to the inputs of the low frequency amplifier LOW PASS MONO NORMAL INVERT RCA jacks for connection of mono low pass signals below the crossover point for mono or bridged amplifier configurations gt REMOTE 12 GROUND Our handy 3 pin plug for power connection of vehicle s Remote Turn On 12 Volts and Power Ground Crossover Programmable Frequency Match Modules and Ground Isolation Selector Inside The crossover and PFM filter modules as well as the ground isolation selector are internal and can be accessed by removing the four top screws and lifting the top panel off the base refer to Figure 8 on page 20 Be sure to turn off the power before you open the EQX We ship each EOX with the crossover installed at 90 Hz and the Programmable Frequency Match filter set at 33 Hz Refer to page 18 for information on how to create your own custom crossover and PFM modules Installation We strongly suggest you have the EQX profes sionally installed but if you are doing it solo this section lists the procedures you ll need to install the EQX in your vehicle Before you begin we suggest you read the nex
10. fold increase in power as demonstrated by the following calculations Concert Series Owner s Manual The formula for output power of an amplifier single channel is Peak Voltage x 707 Output Power watts Load impedance ohms For a normal amplifier rated at 25 watts per channel driving a nominal 4 ohm load the output power is 14 x 707 4 For a bridged amplifier rated at 25 watts per channel driving a nominal 4 ohm load the voltage is doubled and the output power is quadrupled 28 x 707 4 24 49 watts 97 97 watts As this example illustrates a 25 watt amplifier can provide 100 watts of power in the bridged mode for a noticeable increase in bass sound Amplifier Bridging Head Unit sss Ses Sub Amplifier Woofer To Full Range Speakers Figure 6 Wiring diagram for a bridged amplifier system CAUTION Limitations in the amplifier power supply will almost always reduce the available current Therefore the realized power output will generally be less than four times the amplifier s power output Although bridging is the best way to maximize bass output check the amplifiers manual to make sure it is capable of driving a 2 ohm load and that it is not already bridged inter nally l Concert Series Owner s Manual Making You
11. ial adjustments for multi amplifier installations Balancing a system by ear should be per formed as fine tuning after using a Real Time Analyzer since our ears adapt very quickly to any new frequency adjustments In fact if you listen to a badly adjusted system long enough it will actually start sounding pretty good Only later when your hearing refreshes and your buddies come to audition your new system will you realize how far off the mark Def Leppard really is Now do yourself a big favor and ask an autho rized AudioControl dealer about this professional sound balancing option SA 3055 AudioControl SA 3055 Third Octave Real Time Audio Analyzer Amplifier Bridging The EQX comes with LOW PASS MONO Out puts so you can create a bridged amplifier system that will drive a subwoofer at maximum power output as shown in Figure 6 This concept will work on almost any amplifier not already equipped with bridging outputs i e an amplifier without common speaker output grounds Check your amplifier owner s manual to verify that it meets these conditions In the bridged mode each channel of the ampli fier sees half of the load impedance i e 2 ohms versus 4 ohms It outputs one channel in phase with the system and the other 180 degrees out of phase In other words one channel supplies the positive half of the signal and the other the negative side The voltages are summed at the subwoofer for a four
12. nnel with frequency centers at 31 5 45 63 90 125 and 180 Hz OCTAVE EQUALIZER seven full octave equalizer controls with frequency centers at 250 and 500 Hz and 1 2 4 8 and 16 KHz INPUT GAIN variable gain controls to adjust Left and Right input levels OUTPUT LEVEL three output attenuators for each channel to lower the gain of the Full Range and the crossover High Pass and Low Pass Outputs INPUT MAXIMIZED indicator for monitor ing the Input level to detect and set an optimum level 2 VOLT OUTPUT indicator for monitoring the output level when it reaches 2 volts POWER indicator confirms power is reaching the EQX 5 Concert Series Owner s Manual Figure 2 Front panel layout for EQX Equalizer Crossover Level Matcher Highlevel Input Equalize Linelevel Full Range HighPass Low Pass Low Pass Li mi Int Output Output Output Mono Remote Ground domom Out L R L R L R L R Nomal Invert 2 0000000000 m EQUALIZE IN OUT Press in to engage the Connections and Equalizer Bypass equalizer settings on your EQX Series II The front panel contains power and input LINE LEVEL INPUT RCA jacks for connec output connections as well as an equalizer tion of low level stereo signals from a head bypass button as shown in Figure 2 above unit HIGH LEVEL INPUT Our handy 4 pin plug FULL RANGE OUTPUT RCA jacks for for connection of speaker outputs from a connection o
13. nty is also void if the serial num ber has been altered or removed or if the AudioControl EQX is used improperly Now that sounds like a big loophole but here is all we mean by it Unwarranted abuse is a physical damage our mobile products are not meant to be used as jack stands for your car b improper connection we have done the best we can to protect the inputs however 120 volts into the jacks can fry the innards of the poor beasty c sadistic things This is the best mobile product we know how to manufacture but if you use it for the Concert Series Owner s Manual front bumper of your Baja bug and get it full of water and dirt things will go wrong Assuming you conform to numbers 1 through 5 and it isn t all that hard to do we get the option of deciding whether to fix your old unit or replace it with a new one Legalese Section This is the only warranty given by AudioControl This warranty gives you specific legal rights which vary from state to state Promises of how well your EQX will work are not implied by this warranty Other than what we ve covered in this warranty we have no obligation express or implied Also we will not be obligated for direct or indirect consequential damage to your system caused by hooking up the AudioCon trol EQX Failure to send in a properly completed war ranty card negates any service claims Specifications Block Diagram High Level l 4 d x Full
14. of flexibility Programmable 24 dB Octave 2 way Crossover With module programmability the elec tronic crossover in the EQX can be matched up to any stereo system The 24 dB Octave Linkwitz Riley who design was previ ously available in the finest home and professional crossovers Now this state of the art crossover is yours also Linkwitz Riley aren t our attorneys Linkwitz and Riley are a couple of smart guys who designed a very effective fourth order filter for bi amplified systems You hear it each time you see a movie at your local THX theater we like it If you want to know more about this exotic filter check out our Technical Paper 102 appropriately titled Crossover Networks from A to Linkwitz Riley EQ Concert Series Owner s Manual Level Matching True standards in car stereo are hard to find Every manufacturer has a slightly different interpretation of things The input and output level controls on the EQX Series II bring everything together Now any head unit can be connected to any amplifier and make the system sound great Balanced Input The EQX takes noise rejection a step further than the average by incorporating balanced differential input circuitry By looking at the output from your source unit in a different way the EQX can reject up to 60 dB of radi ated noise Radiated Noise Music with Noise Removed Introduction Bridging Adaptor Bridging an amplifier gives you more p
15. ower The EQX can combine the two channels of almost any amplifier into one for really powerful bass The result is up to four times the power for your woofers Where else can you get that good of a deal and still be legal IMPORTANT For maximum product performance nothing is better than a professional system installation Your AudioControl dealer has the training and tools to take care of the job quickly and without the anxiety of drilling holes in your car If you are a dyed in the wool do it yourselfer this manual should provide all the info you need to successfully make music with the EQX The Most Important Instruction Of All FILL OUT AND SEND IN THE WARRANTY CARD Also save the invoice or sales slip as proof of purchase These actions will protect your investment and allow us to better help you with any service related questions Figure 1 Top panel layout for EQX Equalizer Crossover Level Matcher O Concert Series Ow s Manual 2 EX Octave Equalizer Audiocontrol Half Octave aes I 12 31 5 Hz Made in America High Level Input 500 Hz 12 45 Hz Equalize in W Bypass L e Input Input Gain Balanced 2kHz 63 Hz Output Level Full Range C R L Full Range R yy Left Right o 4 kHz 8 kHz 16 kHz 22410 70th Avenue West Mountlake Terrace WA 98043 9 425 775 8461 Output Level Output Level
16. punch tool to mark locations for the four mounting holes 3 Drill a small pilot hole at each marked location 4 Secure the EOX with self tapping screws Concert Series Owner s Manual Connecting the EQX 1 2 With ignition off disconnect the negative lead from the vehicle s battery Connect 12 Vdc and Ground from the vehicle s electrical system to the correspond ing 12 and GROUND terminals on the EQX Also connect the Remote turn on signal from the head unit to the REMOTE terminal Connect a set of RCA cables from the head unit Left and Right outputs to the LINE LEVEL INPUT LEFT and RIGHT on the EQX Series II DO NOT CONNECT OUTPUTS AT THIS TIME NOTE For high level signals splice speaker cable onto the radio s speaker wires and connect the other end to the HIGH LEVEL INPUT Left and Right Installation 4 On the EQX set all equalizer controls to the flat i e 0 position Set the INPUT GAIN controls for minimum gain i e 18 Set all OUTPUT LEVEL controls for maximum attenuation i e o Press the EQUALIZE button IN Reconnect the vehicle s negative battery lead and proceed to the next section Adjusting the EQX I Turn on the head unit or radio On the EQX you should see the red POWER indicator illuminate If not check the power connec tions and try again A test light or digital multi meter works great for this Play a favorite tape or CD with consi
17. r Own Crossover and Programmable Frequency Match Modules A crossover network is a circuit that divides the bandwidth of an audio signal into two or more frequency bands as shown here Crossover Incorporated Figure 7 Here we see Mr Crossover busy dividing music into high and low bands High Sounds Low Sounds Making Modules Since component speakers like woofers mids and tweeters are designed only to reproduce certain frequencies a crossover allows us to match the speakers needs to the appropriate frequency range The correct crossover frequency greatly de pends on your choice of speakers This section presents techniques for improving your installa tion especially if you are planning a bi ampli fied system or are considering adding a subwoofer We recommend choosing a crossover frequency based on using the frequency response of the higher frequency speaker to be connected to the crossover For example in a 2 way system with an 8 speaker for low to mid frequencies and 2 dome tweeter for the highs use the tweeter s frequency specifications to determine the optimum crossover point Sure seems like there s a lot of footnotes in this manual For more details read our Technical Paper 104 Crossovers and Biamplification Most manufacturers list a recommended cross over frequency as part of the speaker s specifica tions Choosing an even higher crossover point will provide increased speaker
18. reliability espe cially at higher volume levels The EQX comes with a programmable 24 dB per octave Linkwitz Riley crossover module set at the factory for 90 Hz This is a common subwoofer woofer crossover point We also include an 18 dB per octave Program mable Frequency Match low cut filter module already set to 33 Hz This will act as a subsonic filter protecting your woofers If you have large woofers i e 12 or 15 you may want a lower frequency module With smaller woofers i e 6 or 8 use a higher frequency Programmable Frequency Match module Concert Series Owner s Manual Making Your Own cont d WARNING Additional modules with pre set frequencies are TURN OFF THE SYSTEM BEFORE CHANG available from an authorized AudioControl ING MODULES OR ELSE SOMETHING IN dealer or you can create a custom crossover YOUR SYSTEM WILL BE DAMAGED and or low cut filter by using the following formula INNARDS top view 7200 TIT o OTO Frequency in Hz EXAMPLE For a 2500 Hz crossover the for GROUND SELECTOR O CROSSOVER ODE MODULE mula yields a resistor with a value of Resistor Value in kohms 7200 2 88 kohms 2500 NOTE Use only resistors having a tolerance of five percent or better i e 5 2 etc SHEY Not another amp plug disguised as a amp foot f PFM note
19. s on the tube anyway The EQX carries on a great tradition started back in 1985 when we introduced the original EQX It was the first serious stereo component for mobile audio Since then AudioControl has gone on to win numerous awards and collect many glowing reviews for its innovative autosound products We have learned a great deal about cars stereos and acoustics over the years All of this has been poured into the new EQX to give you the tools to make your car stereo the envy of all your pals We design test and build each EQX Equalizer Crossover right here in the misty rain forests of the Pacific Northwest When you look inside the rugged two piece steel chassis you ll find we use only premium electronic parts and gold plated RCA jacks It all adds up to a product that will provide you with many years of listening enjoyment and will literally outlast your vehicle TAt last count we see the sun only 129 days each year so we use the abundant indoor hours doing what we do best improving and inventing audio products besides it keeps us from going insane Dual Bandwidth Equalizer 13 bands The dual bandwidth design of the EQX concentrates more control in the lower bass frequencies where the interior of an auto mobile causes problems The higher fre quency controls are spaced on octave centers to give you complete control up to 16 000 Hz No simple dash mount equalizer gives you this kind
20. stent music and turn up the volume control on the head unit or radio to maximum level NOTE Since the outputs are not connected you won t hear any sound at this point 3 Adjust the INPUT GAIN control until the yellow INPUT MAXIMIZED LED starts to flicker Now back the control off until the LED just goes out Next start the track over so that you are referencing the same musical information as in step 3 Adjust the OUTPUT LEVEL until the 2 Volt Output light is flickering steadily If you find that you have turned the OUT PUT LEVEL all the way up without the 2 Volt Output light coming on you may leave this control at 0 or its fully clockwise position Turn down the volume and power off the head unit or radio Connect the EQX outputs to the amplifier s inputs according to your system plan Adjusting the EQX cont d NOTE Consult the amplifier owner s manual for information on setting its input sensitivity If adjustable set each amplifier to accept a signal between 1 0 and 2 0 volts 1000 and 2000 mV This may be a minimum setting on your amp Don t worry the EQX can still drive it to full volume If your amp cannot accept 2V you may need to turn the Output Level down a bit 7 Play a tape or CD preferably one containing a variety of acoustic instruments 8 With the deck s volume set to a normal listening position i e about one third on adjust the OUTPUT LEVEL controls until the system is
21. t few sections to plan the type of system you want System Applications Although the EQX Equalizer Crossover Level Matcher is often used in bi amplified systems refer to Figure 3 it is quite versatile and is designed to also work perfectly in single ampli fier and bi amplified bridged subwoofer sys tems as shown in Figures 4 and 5 For more information on bridging read the section on Amplifier Bridging on page 16 Concert Series Owner s Manual Installation Precautions gt VV Do not mount the EQX Equalizer Cross over Level Matcher where it will be exposed to outside elements or extreme tempera tures Avoid areas that are subject to extreme road vibration or shock The front bumper is definitely out of bounds Select an installation site that provides short cable runs for minimum pick up of engine noise and RFI radio frequency interference Keep RCA cables together away from speaker wires or power cables At the proposed installation site make sure the holes you plan to drill will not hit the fuel tank fuel lines brake lines under the chassis or go through any electrical wiring Use high quality fully shielded RCA cables Plan on a single point grounding scheme that is common to grounded parts of the system Use no less than 16 gauge stranded copper wire for the ground connection Installation Head Unit Amplifier
22. tten designed printed folded and stuffed into a box in the U S A on a miserably drizzly day considering where we live P N 794083
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