Precision Power PCX1250 User's Manual
Contents
1. a 3 A 5 E 7 a 9 High Pass Frequency Hz 3dB High Pass Frequency Hz 3dB OOP See TS A OE ANS TOLLA TICON NOTE TOOLS ARE NOT SUPPLIED Small flat blade screwdriver Phillips screwdriver 2 or medium sized Peer lz Wire cutters Wire strippers 4 6 round head screws and 1 8 sheet metal screw or nut bolt flat washer star washer see detail 2 Ring connectors large enough to accommodate your method of grounding In line fuse or circuit breaker see fuse chart below Power and ground wire see Power Wire Calculator on page 4 Speaker wire 12 16 gauge Grommets sized to work with the power wire you plan to use in your installation Tube of silicone sealant FUSE FE SLIieEAAeENTS j 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 main 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 Amplifier Maximum Fuse Rating PCX 1250 60 Amp PCX 1500 100 Amp ar MARS INTERINALE Sava The New PCX2. 2 clearance around cooling plenums for proper amplifier cooling 2 HP LP FULL Switch Select the desired crossover setting HP LP FULLfor the speaker output signal of the front channel 3 Freq Control Move this detented control in a clockwise rotation to adjust the front crossover fre quency from 30Hz to 4kHz 4 Subsonic Filter Freq Control Move this detented control in a clockwise rotation to adjust the subsonic crossover frequency from 5Hz to 80Hz 5 RCAInputs Connect the RCAcables from the head unit video unit or line driver to these RCA connectors 6 Gain Control Use this control to match the output level of the source unit to the input of the amplifier 7 12dB For use with high level inputs 4V up to 12V Push this switch in to attenuate the input by 12dB 8 QBASS 0 to 12dB 9 Output Crossover HP LP FULLSwitch Select the desired crossover setting HP LP FULLfor the output signal of the RCAoutput 10 Output Crossover Freq Control Move this detented control in a clockwise rotation to adjust the front crossover frequency from 30Hz to 4kHz 11 RCAOutputs RCAoutputs provide HP LP Full 30 4KHz to another amplifier 12 Speaker Output Connections Plug the Speaker PowerLock connector in here 1 Thermal Management Intake Exhaust Plenums 2 Power Ground PowerLock After you have securely connected your power and ground wires plug in the Power Ground PowerLock connector here 3 Power indicator A gre
3. Boost P 3 A 30 36 44 or 60Hz N Crossovers 12dB Octave AS Crossover Frequency 30 4kHz Subsonic Crossover Frequency 5 80Hz r y Idle Current PCX 1500 2 Amps POLLE RATINGS i MODEL 4ohm MONO 2ohm MONO Fa it na y n gt of u PCX 1500 1X500 1 X 1000 T ib pos MN B ALL POWER RATINGS SHOWN ARE TESTED 12V 20 20kHz m NY ONNAEN SOAS y 2 Length Height Width H EQ li SN P 5 i k AN PCX 1500 25 00 2 375 10 PRO SUB PRO SUE YASS x PRO SUB wd PRO SUB CONGRATIAATIOME gt 4 lt 22 lt H And thank you for choosing PrecisionPower audio equipment At PrecisionPower we proudly design engineer and manufacture audio products at our production facilities Our award winning engineering team utilizes innovative technology to consistently deliver Absolutely State of the Art TM performance sound qual ity reliability and value This PrecisionPower product reflects our commitment to offer you unparalleled versatility and quality for years of dependable service and listening enjoyment ee MILE Do not attempt to service PrecisionPower products yourself Performing exploratory surgery on your audio equipment yourself will void the warranty Many parts of your 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 alwa
4. returned immediately to PrecisionPower This warranty is not transferable 2 Non Authorized Dealer Installed Products PrecisionPower will either repair or replace at no charge to the original purchaser any unit which PrecisionPower examination discloses to be defective and under warranty provided the defect occurs within ninety 90 days from the date of purchase and the product is returned immediately to PrecisionPower Warranty claims beyond ninety 90 days for Non Authorized Dealer Installed Products will be for parts only and will extend for one 1 year from the date of purchase This warranty is not transferable 3 Internet and mail order products purchased from non authorized PrecisionPower dealers are not subject to factory warranty PrecisionPower does not endorse or approve of internet and mail order sales but will repair products at current non warrantied part and labor rates 4 The date of purchase and proof of Authorized Dealer Installation of a PrecisionPower product must be established by an original sales receipt which must accompany the article being re turned for war ranty work 5 This warranty shall NOTapply to any PrecisionPower product found to have the original factory serial number removed or defaced All products received by PrecisionPower for in warranty or out of war ranty repair with their original serial numbers removed or defaced will NOTbe repaired and will be returned to sender freight collect Refer to or
5. Harmonic Distortion lt 0 02 S N Ratio gt 110dB Input Topology Instrumentation Input Sensitivity 150mv 12 Volts RMS Input Impedance 10k Ohms Load Impedance mono 2 8 Ohms Supply Voltage 11 15 Volts Damping Factor gt 500 Slew Rate gt 50 V uS QBASS Up To 12dB Boost 40Hz Crossovers 12dB Octave Crossover Frequency 30 4kHz Subsonic Crossover Frequency 5 80Hz Idle Current PCX 1250 1 Amp POLLE RATINGS MODEL 4ohm MONO 20hm MONO PCX 1250 1 X 250 1X 500 ALL POWER RATINGS SHOWN ARE TESTED 12V 20 20kHz ENANA AVES AES Length Height Width PCX 1250 17 00 2 3 5 10 BLOCK DNASRA AAA PCX1250 RCA Loft Input HPILPIAP Switch A gain i QBASS Ci NOUYNNELLY LN NI RCA Right bput PCX1500 RCA Lot Ss Sonic Input Sub Sonic Fitter HPA PIAP RCA Right input NOLLW NELLY Lt NI Output Crossover QBASS REMOTE RCA Output Right O Sass m On the PCX 1250 amplifier we offer tremendous control of your bass with QBASS On the front end panel of your PCX 1250 you will find the QBASS level control Adjust the level control clockwise for up to 12 dB of boost ata factory preset frequency of 40Hz with a Q factor of 2 1208 6dB 20Hz 40Hz 60Hz BOHz 100Hz CAUTION QBASS should only be used in systems with a strong subwoofer section 12dB is a large amount of bass boost and may damage your speakers if abused CROSSOVER DETENT CHART
6. PrecisionPower 9235 South McKemy Street Tempe Arizona 85284 www precisionpower com 8900 4006 TOLLE SAOD TANGE ee NO SOUND Is the LED lit YES NO Check Power and Remote turn on wire for voltage Make sure Ground wire is secure STILL NO SOUND See your Authorized PrecisionPower Dealer or call 1 800 62POWER SOUND IN ONE CHANNEL ONLY Reverse left and right speakers by unplugging the speaker connector turning it over and plugging it back in SOUND IS NOW IN OPPOSITE CHANNEL Reverse RCAinputs SAME CHANNEL Problem is in the speaker or speaker wire of the silent channel SOUND IS NOW IN OPPOSITE CHANNEL Reverse RCAs at head unit SAME CHANNEL Problem is in the Amplifier See your local Authorized PrecisionPower Dealer or call 1 800 62POWER SOUND IS NOW IN OPPOSITE CHANNEL Problem is in the head unit or before the amplifier SAME CHANNEL Problem is in the RCAcables 20 PEATIMES NEW Advanced Instrumentation Input Stage NEW 12dB Octave HP LP FULL 30 4kHz Crossover NEW Independent Line Output Crossover 30 4kHz PWM Power Supply Triple Darlington Output Stage AP IV Protection Circuitry QBASS Bass Boost High Voltage Input Capability with 12dB Attenuation Switch Gold Plated RCA Input and Output Connectors PowerLock Speaker and Power Wire Connectors 3 Yr Warranty installed by an Authorized PrecisionPower Dealer SPEC rice TANI PCX 1250 Power Bandwidth 10 Hz 50 kHz Total
7. WERCLASS amplifiers will effectively double their power at this load 500W x 1 x 2 1000W 1000W 83 3 Amps Total current draw 12V 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 POLLE IRE CRLCULATOE Recommended Minimum Gauge Total Current Draw Length Of Wire To Be Run in amps Up to 4ft 4to 7ft 7to 10ft 10 to 13ft 13 to 16ft 16 to 19ft 19 to 22ft 22 to 28ft 00 00 000 000 NOTE The ground wire should be the same gauge as the power wire TEX CROSSOVER Your New PCX amplifier has a TC X Crossover Total Control X overe See page 19 for crossover Detent Chart 12dB per octave phase correlated crossover built in to provide superior system flexibility without the added 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 switch middle to use this amp for sub woofers choose high pass switch left or full switch right to use this amp for full range speakers The RCAoutputs 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 PCX amplifier allows independent selection of frequencies from 30 4kHz See page 19 NOTE The System D
8. amplifiers mass has been increased by 2 lbs per linear foot over last year s POWERCLASS amplifiers resulting in far superior heat dissipation The unique heatsink on your PCX 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 have ample space around the amplifier for cooling at least 2 on all sides FORO EE AIR TRERMAL MANAGEMENT To manage the additional heat associated with higher output capability a thermally controlled fan has been designed into the PCX 1500 When the heatsink tem perature reaches a pre determined value the fan is activated and cool air is drawn in through the lower intake vents on the endplate This cool air flows below the circuit board through the fan and across the internal fins cooling the heatsink The warm air is then forced out through the upper endplate exhaust vents CERNE Before beginning disconnect the negative terminal of the battery prior to working on the positive terminal to prevent a short to ground This is important unless you want to spend the rest of your life with a nickname like Sparky or Smokey Reconnect the negative terminal only after all connections have been made n Tr EE de ee E Warning A Main Fuse must be installed within 18 of battery When using 16 gauge or larger run the spea
9. and right RCAoutputs provide HP LP Full 30 4KHz to another amplifier 12 Speaker Output Connections Plug the Speaker PowerLock connector in here 2 3 j 4 A AO AN n JUUUUU 0005 J Designed and Manderatied in the U S A i a cD nm A rower o E O O 16 OBASS A REMOTE O A pa 1 Forced Air Thermal Management Intake Exhaust Plenums 2 QBASS PLUS level control up to 18dB 3 QBASS REMOTE plug in Plug in the data cable from the optional QBASS REMOTE dash mount level control here This will bypass the amplifier s on board QBASS control 4 Power Ground PowerLock After you have securely connected your power and ground wires plug in the Power Ground PowerLock connector here 5 Power indicator A green light indicates that the amplifier is on 11 EROLINO LEARN Locate an area near the amplifier s that is metal and clean an area about the size of a quarter to bare metal Inspect the area around and underneath to be sure you won t 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 preferably 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
10. en light indicates that the amplifier is on EMDPLATE MNAC PCX 1500 AO PY itd OUUU 2 1 Cooling Plenums Maint cooling 2 Subsonic Filter Freq Control Move this detented control in a clockwise rotation to adjust the front crossover frequency from 5Hz to 80Hz 3 HP LP FULL Switch Select the desired crossover setting HP LP FULL for the speaker output signal of the front channel 4 Freq Control Move this detented control in a clockwise rotation to adjust the front crossover fre quency from 30Hz to 4kHz See Crossover frequency chart pg 16 5 RCAlnputs Connect the RCAcables from the head unit video unit or line driver to these RCA connectors 6 QBASS 1 amp QBASS 2 Freq Use these switches QBASS 1 amp QBASS 2 to program the QBASS PLUS circuit frequency 6 12dB Input Attenuation Push this switch IN for high voltage input 4V 12V capability This button pushed N must be used for speaker level input on common ground head units or for high voltage line drivers 8 Freq Control Move this detented control in a clockwise rotation to adjust the front crossover frequency from 30Hz to 4kHz 9 Output Crossover Control HP LP FULL Move this detented control in a clockwise rotation to adjust the front crossover frequency from 30Hz to 4kHz See Crossover frequency chart pg 16 10 Gain Control Use this control to match the output level of the source unit to the input of the amplifier 11 RCAOutputs Left
11. iagrams beginning on page 18 show several ways to use the virtually unlimited PCX amplifiers internal crossovers in your system PCX 1250 Front 12dB Octave Detented HP LP Full 30 4kHz Rear 12dB Octave Detented HP LP Full 30 4kHz Subsonic 12dB Octave Detented High Pass 5 80Hz QBASS on Front Channel up to 12db boost 40Hz PCX 1500 Front 12dB Octave Detented HP LP Full 30 4kHz Output 12dB Octave Detented HP LP Full 30 4kHz Subsonic 12dB Octave Detented High Pass 5 80Hz QBASS PLUS on Front Channel up to 18db boost 30 36 44 60Hz O BOSG PELLUS On the PCX 1500 amplifier 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 centers 30Hz 36Hz 44Hz and 60Hz with a Q Factor of 2 On the rear end plate you will find the QBASS level control and the 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 Q BASS PLUS Q BASS Settings 18dB Freq IN 12dB 6dB 30Hz 36Hz 44Hz 60Hz CAUTION QBASS 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 if abused Optional QBASS REMOTE This boost control can be mounted in the dash and will supersede the boost control
12. iginal packaging for the serial number of your component speakers 6 The provisions of this warranty shall not apply to any PrecisionPower product used for a purpose for which it is not designed which has been repaired or altered in any way or which has been con nected installed or adjusted other than in accordance with the instructions furnished in PrecisionPower owner s manual Nor shall this warranty apply to any part which has been subject to misuse neglect or accident 7 PrecisionPower does not authorize any other persons to assume any other liability in connection with its products THIS WARRANTY IS THE ONLY EXPRESS WARRANTY MADE BY PrecisionPower APPLICABLE TO ITS PRODUCTS ANY IMPLIED WARRANTY OR MER CHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE APPLICABLE TO PrecisionPower PRODUCTS IS LIMITED IN DURATION TO THE DURATION OF THIS LIMITED WARRANTY PrecisionPower SHALL NOT BE LIABLE FOR THE INCIDENTAL CONSEQUENTIAL OR COM MERCIAL DAMAGES RESULTING FROM THE BREACH OF THIS WRITTEN WARRANTY Some states or provinces do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts so the above limitations or exclusions may not apply to you 8 Your product will be serviced on an in warranty basis within the warranty period for the correction of warranted defects If improper operation of your PrecisionPower product should occur contact your Authorized Dealer for assi
13. ker 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 Speaker POWERLOCK Connector Left Speaker negative Left Speaker positive Remote turn on Right Speaker positive Right Speaker negative BOWERLOCK CONNECTORS Once you have run both the power and ground wires it s time to 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 bladed screw driver loosen the screws before attempting to insert the cables 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 PCX 1500 Power Ground PowerLock Fastening screws Connect to Amplifier EMDPLATE DMAA PCX 1250 1 Cooling Plenums Maintain a minimum
14. on the bare metal If your grand total current draw is over 50 amps or total outout power is over 300 watts you should run a separate ground wire beside your power wire from the battery to the amplifier s Keep the ground and power wires as close together as possi ble 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 LARRCINO SLA TENTA If your grand 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 Keep in mind that your amplifiers simply convert 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 your local authorized PrecisionPower Dealer or call PrecisionPower Technical Support at 1 800 62POWER x 229 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 don t worry Simply 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 to the IN position 12dB inpu
15. on the endplate PrecisionPowerPCX amplifiers no longer need an optional QPORT to connect multiple QBASS PLUS equipped amplifiers while using one QBASS REMOTE The new QBASS PLUS circuitry in the PCX amplifiers is now positioned before the crossover circuit In doing this PrecisionPower engineers have allowed you to daisy chain your RCAoutput to the next amplifier input causing the first amplifiers Q BASS Remote to become the master control amplifier See your Authorized PrecisionPower Dealer for more information See diagram pg 18 BP PROTECTION CECT Short Circuit Protection engaged The amplifier 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 amplifier will turn off and several minutes later will come back on In this case ensure that there is nothing blocking the normal convective 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 RA PROTECTION CECAT Both excessive temperature and low impedance or short circuit conditions will activate the amplifier s AM V protection circuitry which turns down the amplifier s output When the amplifier cools down or the im
16. pedance is corrected the AM V will restore full power lf your amp is turning down check your speakers and wiring for low impedance and short circuits Also ensure that there is nothing blocking the normal convective 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 FERTURES J SUSTEM DESIGN NEW Advanced Instrumentation Input Stage NEW 12dB Octave HP LP FULL 30 4kHz Crossover NEW Independent Line Output Crossover 30 4kHz Fully Regulated PWM Power Supply Triple Darlington Output Stage AM V Protection Circuitry Forced Air Thermal Management QBASS Plus Bass Boost High Voltage Input Capability with 12dB Attenuation Switch A x EN gt s a A ER d Gold Plated RCAInput and Output Connectors ui WN PowerLock Speaker and Power Wire Connectors sl E Ny NY 3 Yr Warranty installed by an Authorized PrecisionPower Dealer n Y Bi es Ag ci ae E SPECIFICATIONS di F x PCX 1500 p E Power Bandwidth 20 Hz 20 kHz Total Harmonic Distortion lt 0 02 i S N Ratio gt 110dB E gn Input Topology Instrumentation 5 Input Sensitivity 150mv 12 Volts RMS Input Impedance 10k Ohms SUSTEA CF SIGN 5 Load Impedance mono 2 8 Ohms Supply Voltage 11 15 Volts Damping Factor gt 500 i u Slew Rate gt 50 V uS i i QBASS PLUS Up To 18dB
17. stance with the return and factory repair of your PrecisionPower product If an Authorized Dealer is not available return the unit including your name telephone number return address a copy of your sales receipt and a description of the problem to PrecisionPower Service Department 9235 S McKemy Street Tempe AZ 85284 TO RETURN PrecisionPower PRODUCTS OUTOF WARRANTY Return the unit postage prepaid in the original protective carton Please include a description of the problem and if desired a request for an estimate of repair costs Unless a request for an estimate is included the unit will be repaired as necessary Please contact PrecisionPower Customer Service at 1 800 62 POWER for questions concerning out of warranty repair charges Repaired unit will be returned with an itemized statement C O D 21
18. t attenuation switch AAI VANE ED IMSTRLMAEMNTATIOMN IMPLT H The Advanced Instrumentation Input has trickled down from the 15 000 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 400B 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 RCAcable NARA whl noise cancels CONS The following is a basic formula to be used as a guide to determine current draw A50 amplifier efficiency rating is used as an average Your new PCX 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 gauge wire Total RMS output x 2 Total Input Wattage Total Input Wattage Current Draw in Amps Supply Voltage Example A POWERCLASS PCX 1500 amplifier has two channels at 200w per channel RMS rating into 4 Ohms 500 x 1 500 You would use the formula in the following way 500W x 1 500W 500W 41 6 Amps Total current draw 12V If the same amplifier is driven into a 2 Ohm mono load double it s 4 Ohm RMS rating All PO
19. ys sound as good as the day it was purchased Contact your Authorized PrecisionPower Dealer about obtaining any warranty service through PrecisionPower See Warranty inside back cover ASTI The 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 try to observe all local sound ordinances Three Year Limited U S A Warranty This warranty gives you specific legal rights and you may also have other rights which vary from state to state PrecisionPower warrants its products to be free from defects in materials and workmanship under normal use and service for a period of three 3 years from the date of original purchase when the unit is installed by an Authorized Dealer Non Authorized Dealer installed products carry a one 1 year parts and ninety 90 days labor limited warranty The extent and conditions of Limited Warranty are as follows 1 Authorized Dealer Installed Products PrecisionPower will either repair or replace at no charge to the original purchaser any unit which PrecisionPower examination discloses to be defective and under warranty provided the defect occurs within three 3 years from the date of original purchase when the unit is installed by an Authorized Dealer and the product is
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