PPI DCX-500.2 Car Audio Amplifier
Contents
1. ADJUSTING INPUT GAIN 1 Adjust all amplifier input gain controls to just above minimum sensitivity fully counterclockwise 2 Using the cleanest music source CD playing turn up the head unit source volume until you can hear distortion Now turn it down a bit until you cannot hear the distortion usually just below full volume 3 Increase the amplifier gain clockwise until the onset of audible distortion Then decrease the gain to the point just before the distortion starts This setting minimizes background noise and prevents overload 4 Repeat step 3 for any remaining independently controlled amplifiers rear and subwoofer gain controls in the system HIGH MASS INTERNAL HEATSINK The unique heatsink on your DCX amplifier has been designed with fins on the inside of the aluminum extrusion This allows for the transfer of heat from the circuitry to the heatsink fins and out through the vents in the endplates Be sure you provide ample space around the amplifier for cooling at least 2 on all sides AP IV PROTECTION CIRCUIT Short Circuit Protection engaged The DCX amplifiers will turn off and try to come back on immediately The amplifier will cycle like this indefinitely with blips of sound each time If this is the case check your speakers and wiring for low impedance and short circuits Thermal Protection engaged The DCX amplifiers will turn off and after a minute or so will come back on In this case ensure2. E S 19 Troubleshooting secrete Se ern ee dU 20 CONGRATULATIONS Thank you for choosing PrecisionPower audio equipment Designed and engineered in the USA this product combines innovative technology with the finest materials to consistently deliver Absolutely State of the Art performance sound quality reliability and value This PrecisionPower product reflects our commitment to offer you unparalleled performance and quality for years of dependable service and listening enjoyment SERVICE Do not attempt to service PrecisionPower products yourself Performing maintenance on your audio equipment will void the warranty Many parts of the PrecisionPower product are custom built to our specifications Our factory parts are not made available to anyone else nor are they for sale Our goal is to make sure that your PrecisionPower product will always sound as good as the day it was purchased Contact your Authorized PrecisionPower Dealer about obtaining any warranty service through PrecisionPower See the Warranty on the outside of the back cover CAUTION Extended use of a high powered audio system may result in hearing loss or damage While PrecisionPower systems are capable of Concert Level volumes with incredible accuracy they are also designed for you to enjoy at more reasonable levels all of the sonic subtleties created by musicians Please observe all local sound ordinances 5
3. New Advanced Instrumentation Input Stage New 24dB Octave HP LP FULL 30 4kHz Crossover New Independent Line Output Crossover 30 4kHz PWM Power Supply Triple Darlington Output Stage AP IV Protection Circuity QBASS Bass Boost High Voltage Input Capability with 12dB Attention Switch Gold Plated RCA Input and Output Connectors PowerLock Speaker and Power Wire Connectors 2 Yr Warranty if installed by an Authorized PrecisionPower Dealer QBASS PLUS SPECIFICATIONS QBASS PLUS Up to 184 of boost with selectable center frequency at 30Hz 36Hz 44Hz or 60Hz with a Q factor of 2 Optional QBASS REMOTE This boost control can be mounted in the dash and will supersede the boost control on the amplifier endplate SPECIFICATIONS Power Ratings MODEL DCX 300 2 DCX 500 2 4 ohm 2X75 2X125 2 ohm 4 ohm MONO 2X150 1X 300 2X250 1 X 500 All power ratings given above are tested at 12 5V 4 ohms 20Hz 200Hz General Specifications Load Impedance Stereo Load Impedance Bridged Input Topology Conversion Efficiency Frequency Response Linear Bandwidth S N Ratio Input Sensitivity RCA Output Jacks Input Impedance Supply Voltage Damping Factor Slew Rate Crossovers Type Range Crossover Slope QBass Protection Functions 2 8 ohms 4 8 ohms Balanced differential gt 50 02 ohms max power 20Hz 20kHz 0 25dB 10 50kHz 3dB 300 2 gt 110dB 150mv 12 Volts RMS HP LP Ful
4. by an authorized Directed dealer During this two year period there will be no charge for this replacement PROVIDED the unit is returned to Directed shipping pre paid If the unit is installed by anyone other than an authorized Directed dealer the warranty period will be 1 year from the date of purchase by the dealer as indicated by the date code marking of the product During this 1 year period there will be no charge for this replacement PROVIDED the unit is returned to Directed shipping pre paid This warranty is non transferable and does not apply to any unit that has been modified or used in a manner contrary to its intended purpose and does not cover damage to the unit caused by installation or removal of the unit This warranty is void if the product has been damaged by accident or unreasonable use neglect improper service or other causes not arising out of defects in materials or construction ALL WARRANTIES INCLUDING BUT NOT LIMITED TO EXPRESS WARRANTY IMPLIED WARRANTY WARRANTY OF MERCHANTABILITY FITNESS FOR PARTICULAR PURPOSE AND WARRANTY OF NON INFRINGEMENT OF INTELLECTUAL PROPERTY ARE EXPRESSLY EXCLUDED TO THE MAXIMUM EXTENT ALLOWED BY LAW AND DIRECTED NEITHER ASSUMES NOR AUTHORIZES ANY PERSON TO ASSUME FOR IT ANY LIABILITY IN CONNECTION WITH THE SALE OF THE PRODUCT DIRECTED HAS ABSOLUTELY NO LIABILITY FOR ANY AND ALL ACTS OF THIRD PARTIES INCLUDING ITS AUTHORIZED DEALERS OR INSTALLERS Unit must be returned to Directed postage
5. grommet to keep wire from shorting Run the cables under the carpet near the side of the vehicle Be careful not to drill or screw into the wires when you replace the trim For Systems over 300 W Run a ground cable from the amp to the battery instead of grounding to the rear chassis For Systems under 300 W Ground Wire to solid metal of rear chassis Note The cables running from the battery to the rear of the car should be installed on the side of the car opposite to the antenna When using 16 gauge wire or larger 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 wires Cut off excess and using wire strippers strip 1 4 inch of insulation Locate the speaker remote turn on PowerLock connector Loosen the outer screws on the underside of the connector Insert the speaker leads into the end Check to be sure you ve maintained proper polarity before securing each wire and plug the PowerLock into the amplifier Note The power connector is inserted into the amplifier with the wire clamping screws in the up position as shown below Speaker POWERLOCK Connector Left Speaker negative JI Left Speaker positive Remote turn on Right Speaker positive Right Speaker negative Wire clamping screws GROUND WIRING Locate a
6. pre paid with consumer s name telephone number and address authorized dealers name and address and product description IN ORDER FOR THIS WARRANTY VALID YOUR UNIT MUST BE SHIPPED WITH PROOF OF INSTALLATION BY AN AUTHORIZED DIRECTED DEALER ALL UNITS RECEIVED BY DIRECTED FOR WARRANTY REPAIR WITHOUT PROOF OF DIRECTED DEALER INSTALLATION WILL BE COVERED BY THE LIMITED 1 YEAR PARTS AND LABOR WARRANTY Note This warranty does not cover labor costs for the removal and reinstallation of the unit BY PURCHASING THIS PRODUCT THE CONSUMER AGREES AND CONSENTS THAT ALL DISPUTES BETWEEN THE CONSUMER AND Directed SHALL BE RESOLVED IN ACCORDANCE WITH CALIFORNIA LAWS IN SAN DIEGO COUNTY CALIFORNIA Designed and Engineered in the USA by z ELECTRONICS INC 2004 Directed Electronics Inc All rights reserved G48220 25 01 04
7. BASS Level Control Controls bass boost centered at 40Hz with up to 18dB of boost INPUTS There are two sets of RCA jacks on the front end of your amplifier The RCA cables from your source unit go in the set labeled INPUTS If your source unit doesn t have RCA outputs then add a set of RCA plugs available at your dealer to your front or rear set of speaker leads see drawing below Plug them into the input jacks and push in the 12dB input attenuation switch SOURCE Headunit Positive Negative 22 ADVANCED INSTRUMENTATION INPUT The Advanced Instrumentation Input has been incorporated from the legendary PrecisionPower 2500F1 This circuit completely isolates the chassis ground from the audio circuit of the amplifier and reduces noise radiated into your signal cables by up to 4048 This is equivalent to a noise reduction of approximately one hundred times what the noise level would be without this circuitry It provides all the benefits of a true balanced line without the need of any special cables see diagram below This type of input works with any conventional RCA cables IN 0 noise cancels music NO noise 47 Ohms Isolation QBASS PLUS QBASS REMOTE On DCX 300 2 and DCX 500 2 amplifiers we ve taken bass control to a higher level with QBASS PLUS The two QBASS switches labeled 1 and 2 on the front end of the amplifier allow you to select one of four frequency cent
8. PrecisionPower Absolutely State of the Art Mobile Audio AMPLIFIER MODELS DCX 300 2 DCX 500 2 TABLE OF CONTENTS GongratulatioriS x ue dd bt pio ee Lt AS om Ne 2 51218516 MEE Behe ROME 2 eL EI s PME D E ME LE 2 121213 CG QE cL for sc e 3 QBASS PLUS Specifications en ERR 3 Specifications e Aee nra aa a TT ECCE PEDE 4 Amplifier Status LEDs 4 5 ae eee hh ESSE Hee 6 Tools Parts for Installation 24220855 ES 7 Mus es 7 Gro nd ITI uices o e ee als 9 Charging System GPL ERAI eee i RE 9 NIME c E 10 Power Wire Size iu once duas Arai dns 11 PowerLock Connectors ss utei 12 DCX 300 2 DCX 500 2 Front Plate Diagram 13 DCX 300 2 DCX 500 2 End Plate Diagram 14 PUTS ats cr coda 15 Advanced Instrumentation Input 15 QBASS PLUS QBASS Remote 16 Rem qo PET 17 Crossover he RII Rev 18 Adjusting Input Gain Poo eio deme ett a enero Mande Naro te 19 High Mass Internal Heatsink 19 AP IV Protection oor a e por
9. ded expense and installation of an outboard crossover The speaker outputs of your amplifier are high pass low pass or all pass according to the HP LP FULL switch on the front endplate You would choose low pass middle position of switch to use this amplifier for subwoofers choose high pass left position of switch or full right position of switch to use this amplifier for full range speakers The RCA outputs are controlled by a separate HP LP FULL switch and are always independent of the speaker output crossover As well as being able to independently select HP LP FULL your new DCX amplifier allows independent selection of frequencies from 30Hz 4kHz see Crossover Detent Chart in this guide DCX 300 2 500 2 Speaker Output 12dB Octave Detented HP LP 30Hz 4kHz Low Level Output 12dB Octave Detented HP LP QBASS PLUS up to 18dB 30 36 44 60Hz CROSSOVER DETENT CHART Low Pass High Pass Detent 4 Frequency Hz Frequency Hz 3dB 3dB 1 28 52 2 28 52 3 30 52 4 30 56 5 30 56 6 32 60 7 34 64 8 36 72 9 38 76 10 42 80 11 46 88 12 50 92 13 52 100 14 54 116 15 60 132 16 66 148 17 76 168 18 88 192 19 100 216 20 116 244 21 136 284 22 144 348 23 168 404 24 198 468 25 240 512 26 286 564 27 310 624 28 340 700 29 380 800 30 424 932 31 484 1036 32 576 1144 33 632 1300 34 748 1504 35 932 1812 36 1076 2196 37 1428 2840 38 1700 4116 39 2436 4540 40 2830 4728 41 2980 4728
10. ers 30Hz 36Hz 44Hz and 60Hz On the rear end plate you will find the QBASS level control and plug in for an optional QBASS REMOTE dash mounted level control Adjust the level control clockwise for up to 18dB of boost at your selected frequency QBASS Settings Q Q BASS PLUS 2 Freq 41848 4 CAUTION 55 PLUS should only be used in systems with a strong subwoofer section 18dB is a tremendous amount of bass boost and may damage your speakers or create excessive distortion if abused 30Hz 36Hz 44Hz 60Hz The optional QBASS REMOTE This boost control can be mounted in the dash and will supersede the boost control on the endplate The PrecisionPower DCX amplifiers no longer need an optional QPORT to connect multiple QBASS PLUS equipped amplifiers while using QBASS REMOTE The new QBASS PLUS circuitry in the DCX amplifiers is now positioned before the crossover circuit In doing this PrecisionPower engineers have allowed you to daisy chain your RCA output to the next amplifier input causing the first amplifiers QBASS REMOTE to become the master control amplifier See your authorized PrecisionPower dealer for more information TC X CROSSOVER Your new DCX amplifier has a TC X Crossover Total Control X over 2 4 2 see this guide for Crossover Chart 12dB per octave phase correlated crossover built in to provide superior system flexibility without the ad
11. ert electrical energy to acoustical energy and any electrical deficiency will compromise the performance of your sound system For more information about charging system upgrades see you local authorized PrecisionPower Dealer or call PrecisionPower Technical Support at 1 800 62POWER x2033 CURRENT DRAW The following is a basic formula to be used as a guide to determine current draw Your new DCX amplifier is more efficient than most other amplifiers This formula is to be used as a guideline Using wire of a larger gauge can only improve the current transfer of your system Do NOT use smaller wire gauge Total RMS output X 1 5 Total Input Wattage Total Input Wattage Current Draw in Amps Supply Voltage Example A DCX amplifier has two channels at 125 watts per channel RMS rating into 4 ohms 125X2 250 watts You would use the formula in the following way 500 W X 1 5 2 750 watts EL 62 5 Amps total current draw If the same amplifier is driven into a 2 ohm stereo 4 ohm mono load double it s 4 ohm RMS rating All DCX amplifiers will effectively double their power at this load 500W X 1 5 X2 1500 watts rr 125 Amps total current draw If you are using more than one amplifier add up the total current draw for all of them and choose the appropriate gauge based on the grand total POWER WIRE SIZE A minimum of 8 gauge or a maximum of 4 gauge wire is recommended dependent on the application The
12. ground wire must be the same gauge as the power wire POWERLOCK CONNECTORS Once you have run both the power and ground wires then connect the cables to the amplifier Cut off excess wire and using wire strippers strip the ends of the power and ground cables approximately 1 4 inch Locate the PowerLock power and ground connector supplied With a small flat blade screwdriver loosen the screws before attempting to insert the cable wires Insert the wires into the appropriate hole and tighten the screws Once the wires are secure the PowerLock may be plugged into the amplifier The Power Ground PowerLock will accommodate 4 gauge wire for the DCX 300 2 and DCX 500 2 Power wires Fastening screws Connect to Amplifier DCX 300 2 DCX 500 2 FRONT PLATE DIAGRAM DCX 3002DCX 5002 FiontPanel U U 0o mes 6 3 C Le ERU Q OUTPUT B5 gt R R REM L L C Q 2 111000 o 0000000 1 Cooling Plenums Maintain a minimum 2 clearance around cooling plenums for proper amplifier cooling 2 Speaker Remote Connector Plug in the PowerLock connector here 3 Output Xover Freq Control Use this control to adjust the sub bass output signal crossover frequency from 30Hz to 4kHz See the Crossover Frequency chart in this manual 4 Output Xover FULL LP HP Switch Select the desired crossover set
13. l 30Hz to 4kHz 20 000 Ohms 9 16 Volts gt 250 300 2 300 500 2 gt 20V us HP off 12dB switch 30Hz to 4kHz LP off 12dB switch 30Hz to 4kHz 12dB octave Variable 0 to 12dB boost 40Hz Short and thermal Fuse Requirements You will need to install an in line fuse or circuit breaker in the power wire within 18 of the battery This fuse or circuit breaker is to protect your vehicle from fire in case the power wire shorts to the vehicle body If you are only using one amplifier use the fuse rating indicated in this chart If you are using more than one amplifier add up the fuse ratings for all the amplifiers This sum is the rating for your fuse or circuit breaker You may also want to add a power distribution block near your amplifiers to distribute large gauge power cable to multiple amplifiers Amp Fuse DCX 300 2 35 A DCX 500 2 50A Dimensions Length Width Height DCX 300 2 24 34 10 12 2 34 DCX 500 2 27 3 s 10 72 2 4 AMPLIFIER STATUS LEDS o o dd The LEDs provide the following indications 1 Power This LED illuminates RED when the amplifier power is turned on with the remote input output muted After a short time delay this LED will turn GREEN amplifier ready 2 Clip Output This LED illuminates RED on the peaks of the output signal when the peaks are too high This clipping causes audible distortion in the speakers 3 Short Thi
14. n area near the amplifier s that is metal and clean an area about the size of a quarter down to bare metal Inspect the area around and underneath to be sure you will not drill into wires brake or fuel lines etc Drill a pilot hole in the middle of this area Terminate the ground wire with a ring connector and attach it to the bare metal using a 8 sheet metal screw and washer or preferable a bolt nut and a star washer not supplied We suggest crimping and soldering this connection After the connection is complete coat the area on both sides with silicone or some similar material to prevent rust from developing on the bare metal If your total current draw is over 80 amps or total power is over 500 watts Keep the ground and power wires as close together as possible and use the same gauge wire for both This will ensure that you have a good ground path and may eliminate such potential problems as engine noise and overheated amplifiers CHARGING SYSTEM If your total current draw is over 100 amps or total output power is over 600 watts you are probably exceeding the capability of your charging system Dimming lights and fluctuating voltage are solid indicators that you need to upgrade your alternator battery or both 9 You should also check the condition and current capacity of the stock battery negative cable and connections and replace or upgrade as necessary Keep in mind that your amplifiers simply conv
15. s LED illuminates RED on a short condition The amplifier will turn off and try to turn back on 4 Thermal This LED illuminates RED on a thermal condition The amplifier will turn off and turn back on in a minute or so Note Read the AP IV Protection Circuit section for additional information regarding Short and Thermal protection TOOLS PARTS FOR INSTALLATION NOTE TOOLS ARE NOT SUPPLIED Small flat blade screwdriver Phillips screwdriver 2 or medium sized Wire cutters Wire strippers 4 6 round head screws and 1 8 sheet metal screw or nut bolt flat washer star washer see details 2 Ring connectors large enough to accommodate your method of grounding In line fuse or circuit breaker Power and ground wire Speaker wire 12 16 gauge Grommets sized to work with the power wire you plan to use in your installation Tube of silicone sealant WIRING Before beginning disconnect the negative terminal of the battery prior to connecting the amplifier to the positive 12V terminal to prevent a short to ground and potential damage to wiring and equipment Some vehicle radios have an anti theft feature where when the radio is removed from 12V the radio will no longer function and must be code reset Factory Ground wire may need to replaced if it is small frayed or broken 1 Fuse must be installed within Drill a hole in the firewall BR Wf SII 18 of battery and use a rubber
16. that there is nothing blocking the normal convection airflow of the amplifier No obstruction should be within 2 of the amplifier on all sides Note Low battery voltage will cause the amplifier to run warmer and possibly damage the amplifier 19 TROUBLESHOOTING NO SOUND Is the LED illuminated YES NO Check Power and Remote turn on wire for voltage Make sure the ground wire is secure STILL NO SOUND See e See your Authorized PrecisionPower Dealer or call 1 800 62POWER SOUND IN ONE CHANNEL ONLY Reverse the left and right speakers by unplugging the speaker connector turning it over and plugging it back in SOUND IS NOW IN OPPOSITE CHANNEL SAME CHANNEL Reverse RCA inputs Problem is in the speaker or speaker wire of the silent channel SOUND IS NOW IN OPPOSITE CHANNEL SAME CHANNEL Reverse RCA inputs Problem is in the amplifier at head unit See your local Authorized PrecisionPower Dealer or call 1 800 62POWER SOUND IS NOW IN OPPOSITE CHANNEL SAME CHANNEL Problem is in the head Problem is in the RCA unit or before the amplifier cables 20 LIMITED TWO YEAR CONSUMER WARRANT Y Directed Electronics Inc promises to the original purchaser to replace this product should it prove to be defective in workmanship or material under normal use for a period of two years from the date of purchase by the dealer as indicated by the date code marking of the product PROVIDED the product was installed
17. ting HP LP FULL for the signal of the RCA outputs 5 QBASS Freq Use this adjustment to set the QBASS frequency 6 12dB Input Attenuation Push this switch IN for high voltage 4V 12V capability This button pushed IN must be used for speaker level input on common ground head units or for high voltage line drivers 7 Gain Use this control to match the output level of the source unit to the amplifier 8 Input Plug in the RCA leads from your source here 9 Xover Adjustment Adjusts the crossover between 30Hz and 4kHz 10 Xover FULL LP HP Switch Select the desired crossover setting FULL LP HP 11 QBass Adjusts the amount of boost provided by the QBASS circuit 12 RCA Outputs RCA outputs provide HP LP FULL 30 4kHz signal to another amplifier DCX 300 2 DCX 500 2 END PLATE DIAGRAM DCX 3002DCX 5002 End Panel CO D U 55 C Co REMOTE A 20 C 16 40000 4 0000000000000000 o H0000 o 1 Cooling Plenums Maintain minimum 2 clearance around cooling plenums for proper amplifier cooling 2 Power Ground PowerLock After you have securely connected your power and ground wires plug in the Power Ground PowerLock connector here 3 QBASS REMOTE Plug in the data cable from the optional QBASS dash mounted level control here The remote level control will bypass the amplifiers on board QBASS control 4 Q
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