POWERCLASSTM PC6800 Owners Manual - Precision Power

POWERCLASS TMPC6800 Owners ManualCONTENTS(Click on a topic to view)CongratulationsFeatures / SpecificationsQBASS PLUS TMInstallationWiringWiring (continued)Crossover SettingsInputsCrossover OperationInput, Combine, and GainTroubleshootingTroubleshootingPower / Ground System Diagram 1Power, Ground and Remote System Diagram 2Speaker Wiring System Diagram 3Bridging System Diagram 4Endplate Diagram System Diagram 5Controls Diagram 1Controls Diagram 2Block DiagramWarranty

Congratulations and thank you.....for choosing PrecisionPower audio epuipment. At PrecisionPower weproudly design, engineer and manufacture audio products at our facility inPhoenix, Arizona. Our award winning engineering team utilizes innovativetechnology to consistently deliver Absolutely State of the Art TMperformance,sound quality, reliability, and value. This PrecisionPower product reflectsour commitment to offer you unparalleled versatility and quality for years ofdependable service and listening enjoyment.ServiceDo not attempt to service PrecisionPower products yourself.Performing exploratory surgery on your audio equipment yourselfwill void the warranty. Many parts of your PrecisionPower gearare custom built to our specifications. Our factory parts are notmade available to anyone else nor are they for sale. Our goalis to make sure that your PrecisionPower product will alwayssound as good as the day it was purchased. Contact yourauthorized PrecisionPower dealer about obtaining any warrantyservice through PrecisionPower.(See Warranty inside back cover)FOR YOUR RECORDS:M o d e lSerial NumberPurchase DateCaution!The extended use of a high powered audio system mayresult in hearing loss or damage. While PrecisionPowersystems are capable of "Concert Level" volumes withincredible accuracy, they are also designed for you toenjoy at more reasonable levels all of the sonic subtletiescreated by musicians. Please observe all local soundordinances.BACK TO CONTENTS

FEATURES / SPECIFICATIONSPWM Switching Power SupplyFully Complementary Triple Darlington Output StageAM IV Protection CircuitryQBASS PLUSQBASS REMOTE CompatiblePowerLock Speaker and Power Wire ConnectorsVariable, 6-Way Internal CrossoverNon-Fading Sub ChannelsBalanced Differential Input StageHigh Voltage Input Capability with Input Attenuation SwitchGold Plated RCA Input and Output ConnectorsMixed Mono/Stereo OperationMultiple System ConfigurationPSC-221 Input SwitchingThree Year Warranty when installed by an AuthorizedPrecisionPower DealerCompletely Designed And Handcrafted In The USASpecificationsPower Bandwidth:4.5 Hz - 100 kHzTotal Harmonic Distortion: 0.02 %Input Topology:DifferentialInput Sensitivity:150mv - 12 volts RMSInput Impedance:10k OhmsLoad Impedance (stereo) 2 - 8 OhmsLoad Impedance (bridged) 4 - 8 Ohms (Channels 1-4)Load Impedance (bridged) 2 - 8 Ohms (Channels 5-6)Supply Voltage11 - 15 voltsDamping Factor >500Slew Rate>50 V/µSIdle Current:2.25 AmpsContinuous Output PowerCHANNELS 1/250 WRMS x 2 @ 4Ω per channel100 WRMS x 2 @ 2Ω per channel200 WRMS x 1 @ 4Ω bridgedCHANNELS 3/450 WRMS x 2 @ 4Ω per channel100 WRMS x 2 @ 2Ω per channel200 WRMS x 1 @ 4Ω bridgedCHANNELS 5/650 WRMS x 2 @ 4Ω per channel100 WRMS x 2 @ 2Ω per channel200 WRMS x 2 @ 1Ω per channel200 WRMS x 1 @ 4Ω bridged400 WRMS x 1 @ 2Ω bridged1DimensionsLength - 25.25"Height - 2.25"Width - 8.9"BACK TO CONTENTS

QBASS PLUS QBASS PLUS On POWERCLASS amplifiers, we've taken bass control toa higher level with QBASS PLUS . The two QBASSswitches (labeled 1 and 2) on the front end of the amplifierallow you to select one of four frequency centers - 30 Hz,36 Hz, 44 Hz and 60 Hz. The Q SELECT switch determinesthe width of boosted frequencies. A 'Q' of 2 (switch out)will give you a wide boost while a 'Q' of 4 will boost anarrow range of frequencies (See chart below). On therear end panel you will find the QBASS level control andthe plug-in for an optional QBASS REMOTE dashmounted level control. Adjust the level control clockwisefor up to 18dB of boost at your selected frequency and Q.QBASS PLUS QBASS Settings1 2 Freq.IN IN 30HzIN OUT 36HzOUT IN 44HzOUT OUT 60Hz+18dB+12dB+6dB0dBOptional QBASS REMOTE This boost control can be mountedin the dash and will supersede theboost control on the endplate.Q = 4 Q = 230Hz 36Hz 44Hz 60HzQBASS0QBASS REMOTE +18Designed and handcrafted in the USAOptional QPORT expansionmodule allows one boost controlto operate multiple amplifiers. EachQPORT has outputs for four amplifiersas well as another QPORT for greaterexpansion. See your Authorized PrecisionPowerDealer for more information!Crossover SpecificationsPC PRO 6800Linkwitz-Riley crossover topology used throughout.High Pass (Channels 1/2, 12dB/Octave stereo) Fully Variable 20 Hz - 20 KHz.Band Pass (Channels 3/4, 12dB/Octave stereo) Fully Variable 20 Hz - 20 KHz.Sub or Band Pass Channels 5/6, (24dB/Octave mono Fully Variable 50 Hz - 500 HzLowpass or 12dB/Octave stereo 20 Hz - 20 KHz Bandpass).Sub or Band Pass RCA outputs will be the opposite of Channels 5/6 Crossover.QBASS PLUS on Lowpass assigned to Channels 5/6 or RCA OUTPUT.CAUTION: QBASS PLUS should only be used in systems with strongsubwoofers. 18dB is a lot of bass boost and could damage full range speakers.2BACK TO CONTENTS

INSTALLATIONTools/Parts needed for Installation (not supplied)Small flat blade screwdriverPhillips Screwdriver (#2 or medium sized)Wire cuttersWire strippers4 - #6 round head screws, and 1 - #8 sheet metal screw(or nut, bolt, and star washer)2 - Ring connectors (large enough to accommodate yourmethod of grounding)In-line fuse or circuit breaker - see fuse chart belowPower and ground wire - see Power Wire Calculator on page 3Speaker wire - 16 gauge or largerGrommets (sized to work with the power wire you plan to usein your installation)Tube of silicone sealantFuse requirementsAmplifierPro6800Maximum Fuse Rating80 AmpYou will need to install an in-line fuse or circuit breaker inthe power wire within 18" of the battery. This fuse or circuitbreaker is to protect your vehicle from fire in case the powerwire shorts to the vehicle body. If you are only using oneamplifier, use the fuse rating indicated in this chart. If you areusing more than one amplifier, add up the fuse ratings for all theamplifiers. This sum is the rating for your fuse or circuit breaker.You may also want to add a power distribution block near youramplifiers to keep the wiring tidy.3BACK TO CONTENTS

WIRINGThe following is a basic formula to be used as a guide to determine currentdraw. A 50% amplifier efficiency rating is used as an average. Your newPOWERCLASS amplifier is more efficient, other amplifiers will probablybe less. This formula is to be used as a guideline. Using wire of a largergauge can only improve the current transfer of your system. Do not usesmaller gauge wire.Total RMS output x 2 = Total Input WattageTotal Input Wattage = Current Draw (in Amps)Supply VoltageExample: A POWERCLASS Pro6800 amplifier has six channels at 50watts RMS per channel into 4 Ohms (50 x 6 = 300). You would use theformula in the following way:300W x 2 = 600W600W = 50A Total current draw.12VIf the same amplifier is driven into a 2 Ohm stereo or 4 Ohm mono load,double it's 4 Ohm RMS rating. All POWERCLASS amplifiers will effectivelydouble their power at this load.300W x 2 x 2 = 1200W1200W = 100A Total current draw.12VIf you are using more than one amplifier, add up the total current drawfor all of them and choose the appropriate gauge based on the grand total.Power Wire CalculatorRecommended MINIMUM GaugeTotal Current DrawLength Of Wire To Be Run( in Amps) Up to 4ft. 4 to 7ft. 7 to 10ft. 10 to 13ft. 13 to 16ft. 16 to 19ft. 19 to 22ft. 22 to 28ft.0-20 14 12 12 10 10 8 8 820-35 12 10 8 8 6 6 6 435-50 10 8 8 6 6 4 4 450-65 8 8 6 4 4 4 4 265-85 6 6 4 4 2 2 2 085-105 6 6 4 2 2 2 2 0105-125 4 4 4 2 2 0 0 0125-150 2 2 2 2 0 0 0 00(NOTE: The ground wire should be the same gauge as the power wire.4BACK TO CONTENTS

eject1 2 3 45 6 7 8 Trk 1BASS TREBLEBALANCETRACKPPI MAR KET ING DPTVOLUMELEFTRIGHT FOWARD REVERSEWIRINGBefore beginning, disconnect the negative (-) terminal of thebattery prior to working on the positive (+) terminal to preventa short to ground. This is important, unless you want to spendthe rest of your life with a nickname like "Sparky," or "Smokey."Reconnect the negative terminal only after all connections havebeen made.Factory Ground wire mayneed to be replaced if it isfrayed or broken.PositiveBatteryTerminalFuse must beinstalled within18" of batteryRun signal cables (RCAs)and remote turn-on leaddown the opposite side ofthe vehicle of the powerwire to avoid radiated noise.Drill a hole in the firewalland use a rubber grommetto keep wire from shorting.Avoid sharp edges thatcould chafe through theinsulation.Run the cables under thecarpet near the side of thevehicle. Be careful not todrill or screw into the wireswhen you replace the trim.For systems over 300 watts,add a ground cable from theamp to the battery(see page 6).Firmly attach AmpGround Wire to solidmetal (see page 6).Warning!Fuse must be installed within 18" of battery5BACK TO CONTENTS

POWER / GROUNDGroundingLocate an area near the amplifier(s) that is metal and cleanan area about the size of a quarter to bare metal. Inspect thearea 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 thisarea. Terminate the ground wire with a ring connector and attachit to the bare metal using a #8 sheet metal screw and washeror preferably, a bolt, nut and a star washer (not supplied). Wesuggest crimping and soldering this connection. After theconnection is complete, coat the area (on both sides) withsilicone or some similar material to prevent rust fromdeveloping on the bare metal.If your grand total current draw is over 50 amps (or total outputpower is over 300watts), you should run a ground wire besideyour power wire from the battery to the amplifier(s) in additionto your regular ground wire. Keep the ground and power wiresas close together as possible, and use the same gauge wirefor both. This will ensure that you have a good ground path,and may eliminate such potential problems as engine noiseand overheated amplifiers.Charging System ConsiderationsIf your grand total current draw is over 100 amps (or total outputpower is over 600watts), you are probably exceeding thecapability of your charging system. Dimming lights andfluctuating voltage are solid indicators that you need to upgradeyour alternator, battery (or go to multiple batteries), or both.Keep in mind that your amplifiers simply convert electricalenergy to acoustical energy, and any electrical deficiency willcompromise the performance of your sound system.For more information about charging system upgrades, seeyour local authorized PrecisionPower Dealer or callPrecisionPower technical support at: 1-800-62POWER.6BACK TO CONTENTS

POWER / GROUND and REMOTEOnce you have run both the power and ground wires, it's timeto connect the cables to the amplifier. Cut off excess wire and,using wire strippers, strip the ends of the power and groundcables approximately 1/4 inch. Locate the PowerLock powerand ground connector (supplied). With a small flat bladed screwdriver, loosen the screws before attempting to insert the cables.Insert the wires into the appropriate hole, and tighten thescrews. Once the wires are secure, the PowerLock may beplugged into the amplifier. The Power/Ground PowerLock willaccommodate 4 gauge wire for the Pro6800.Power/Ground PowerLockPower wiresFastening screwsConnect to Amplifier7BACK TO CONTENTS

SPEAKER WIRINGUsing 16 gauge or larger, run the speaker wires from theamplifier location through the vehicle to the speakers. Observethe same precautions for routing these wires that you followedfor running the power and remote turn-on wires. Cut off excessand, using wire strippers, strip 1/4 inch of insulation. Locatethe speaker/remote turn-on PowerLock connector. Loosen thefour outer screws on top of the connector and insert theChannels 5/6 speaker leads into the end. Check to be sureyou've maintained proper polarity before securing each wire.Speaker PowerLock ConnectorRight Speaker negativeRight Speaker positiveRemote turn onLeft Speaker positiveLeft Speaker negativeSpeaker PowerLock ConnectorRight Speaker negativeRight Speaker positiveLeft Speaker positiveLeft Speaker negativeSpeaker/Remote PowerLockFor the front and rear channels, locate the four terminal speakerPowerLock connectors. On your new Pro6800 PowerClassAmplifier, all speaker PowerLocks plug into the amplifier withthe screws facing up. Loosen the screws on the top of the blocksand insert the stripped ends of the speaker wires into the end.Double check polarity, secure each wire by tightening thescrews, and plug the PowerLock connector into the amplifierwith the screws on top.8BACK TO CONTENTS

BRIDGINGBridgingAny or all pairs of channels (1/2, 3/4 or 5/6) on yourPOWERCLASS multi channel amplifier are capable of beingbridged into a 4 ohm mono output without switches or bridgingmodules (2 ohm mono on Channels 5/6). This feature permitsthe creation of a mono channel for a subwoofer or centerchannel.Deriving the mono channel is accomplished by using the leftchannel positive wire of the pair as the positive speaker wireand the right channel negative wire as the negative speakerwire. You should always be working with the wires of a singlePOWERLOCK speaker connector when bridging a pair ofchannels.NOTE: It is important that a minimum 4 ohm impedance isobserved (2 ohm mono on Channels 5/6). If the impedancedrops significantly below 4 ohms while the amplifier is wiredin the bridged configuration, the amplifier's protectioncircuitry may engage.Mixed Mono OutputThe ability to run stereo speakers while simultaneously runninga mono output from the same channel pair is accomplished byrunning the stereo speakers normally and tapping into theappropriate wires for the "mixed mono" channel (left channelpositive for the positive speaker wire and right channel negativefor the negative speaker wire). Total speaker impedance shouldbe no lower than 2 ohms on the stereo channels and 4 ohmson the mono channel.NOTE: Passive crossovers must be used for "mixed mono"operation. Choose a low pass crossover around 100Hz foryour subwoofer, then choose a high pass crossover for yourstereo channels. The high pass crossover must be at the sameor slightly higher frequency than the low pass crossover tomaintain the correct impedance. See your PrecisionPowerdealer or call 1-800-62POWER for more information aboutpassive crossovers.9BACK TO CONTENTS

ENDPLATE DIAGRAMPro68001. Q SELECT 4/2Push this button in for a Q setting of 4 and out for a setting of 2.2. QBASS 1Use this switch with the QBASS 2 to program the QBASS PLUS circuit. (see page 2).3. QBASS 2Use this switch with the QBASS 1 to program the QBASS PLUS circuit. (see page 2).4. COOLING VENTS (see page 16).5. SPEAKER/REMOTE CONNECTORAfter connecting remote and speaker wires, plug in the PowerLockconnectors here (see pages 7-9).6. -12dBFor use with high level inputs (4V up to 12V). Push this switchin to attenuate the input by 12dB (see page 14).7. INPUTS APlug in the Front RCA leads from your head unit here (see page 14 & 16).8. INPUTS BPlug in the Rear RCA leads from your head unit here (see page 14 & 16).9. OUTPUTSLeft and Right RCA outputs provide band pass or mono low pass signal to another amplifier.10. POWER / MUTE indicatorA green light indicates that the amplifier is on, a red light indicates that the amplifier'smuting circuits have been engaged by an ACM-420.11. QBASS LevelTurn this control clockwise to boost the QBASS PLUS circuit by up to 18dB.12. QBASS REMOTE plug inPlug in the data cable from the optional QBASS REMOTE dash mount level control here.(This will bypass the amplifier's on board QBASS control)13. POWER / GROUND POWERLOCKAfter you have securely connected your power and ground wires, plug in thePower / Ground POWERLOCK connector here.1 2 3 4 512CHANNELS 1 / 2L- L+ R+ R-CHANNELS 3 / 4L- L+ R+ R-CHANNEL 5 / 6L- L+ REM R+ R-Q SELECT 4/2QBASSINPUTS B-12dBINPUTSALR L RL ROUTPUTSPC PRO 650 12/13/9667 8 9 4 10QBASSDesigned and Handcrafted in the U.S.A.POWER / MUTE0 +18 QBASSREMOTE+-11 121013BACK TO CONTENTS

CONTROLS DIAGRAMONEHighpass crossover adjustment (12dB/octave) and GAIN control for CHANNELS 1/212dBCHANNEL 1 / 2 GAINX10 20Hz-2K200Hz-20K12dB12dBCHANNEL 3 / 4 GAINX10200Hz-20K20Hz-2KX10200Hz-20K20Hz-2K12dB12dBCHANNEL 5 / 6 GAINX10200Hz-20K20Hz-2KX10200Hz-20K20Hz-2K24dBCOMBINE PSCLP / BP50Hz-500HzPSC:Push this switch "IN"to use a PSC-221on channels 3/4.(COMBINE switch out)Highpass and Lowpass crossover adjustmentsand GAIN controls for CHANNEL 3/4 allow foreither Highpass, Bandpass or Lowpass.COMBINE switch:Switch pushed 'IN' connects the rearchannels to the Inputs A.Switch 'OUT' allows front-to-rear fading.When LP/BP switch is 'OUT', Bandpass crossoveradjustment (Channels 5/6, 12dB/octave) is the sameas Channels 3/4 and Lowpass goes to RCA OUTPUTS.ORWhen LP/BP switch is pressed in Channel 5/6 will be Lowpass(24dB/octave) and RCA OUTPUTS are Bandpassed.11BACK TO CONTENTS

IIIIIIIIIIIIIIIIIIIIIIICONTROLS DIAGRAMTWOSettings For A Basic 3 Way System plus Sub OutputExample Crossover Points: Tweeters / Mid - 4 KHzMid / Midbass - 521 HzMidbass / Sub - 70 HzIIIII I I I III I I I IICount 31 "clicks" starting from 1to get to 4 KHzIIX10 20Hz-2K1 21200Hz-20KX10200Hz-20KX10200Hz-20K112120Hz-2K1 2120Hz-2K112dB12dB12dBX10200Hz-20KX10200Hz-20KCOMBINE PSCLP / BP321 2120Hz-2K1 2120Hz-2K1 4150Hz-500Hz12dB12dB24dBCHANNEL 1 / 2 GAINIIIIIIII I I I IIISwitch Pushed"IN"II I II41IIII I I I I II I I I I III32I11CHANNEL 3 / 4 GAINIIIIIII I I I I IIII I I II41IICount 14 "clicks"starting from 1to get to 521 HzIIIII I I I I II I I I I II I I I I II I I I I ISwitch Pushed"IN"Count 16 "clicks"starting from 1to get to 70 HzIIII32II11CHANNEL 5 / 6 GAINIIIIIII I I I I IIISwitch Pushed"OUT"I I I II41Switch Pushed"IN"IIIIIII I I I I IIII I I IISwitch Pushed"IN"Switch Pushed"OUT"11214132IIII I I I I I II I I I I IIII1132IIIIIII I I I I IIII I I II41Count 31 "clicks" startingfrom 1 to get to 4 KHzCount 14 "clicks" startingfrom 1 to get to 521 HzIIII I I I I II I I I I IIII1132IIIIIII I I I I IIII I I IICount 9 "clicks" startingfrom 1 to get to 73 HzSUBMid Bass Mid Range Tweeters20 Hz 70 Hz 521 Hz 4 KHz20 KHz(RCA outputs)Resulting frequency response at speaker outputs12BACK TO CONTENTS

CROSSOVER SETTINGSAll 12dB/octave 20Hz - 21KHzHighPass and BandPassPosition X1-Out X10 - In1 20 Hz 220 Hz2 20 Hz 220 Hz3 20 Hz 220 Hz4 20 Hz 220 Hz5 21 Hz 222 Hz6 22 Hz 240 Hz7 23 Hz 255 Hz8 25 Hz 276 Hz9 28 Hz 299 Hz10 31 Hz 324 Hz11 34 Hz 360 Hz12 38 Hz 401 Hz13 43 Hz 452 Hz14 50 Hz 521 Hz15 59 Hz 609 Hz16 70 Hz 712 Hz17 80 Hz 836 Hz18 87 Hz 916 Hz19 94 Hz 976 Hz20 99 Hz 1.04 KHz21 107 Hz 1.12 KHz22 117 Hz 1.21 KHz23 128 Hz 1.30 KHz24 140 Hz 1.42 KHz25 155 Hz 1.59 KHz26 173 Hz 1.77 KHz27 193 Hz 2.00 KHz28 220 Hz 2.28 KHz29 255 Hz 2.67 KHz30 310 Hz 3.17 KHz31 385 Hz 4.00 KHz32 492 Hz 5.11 KHz33 608 Hz 6.50 KHz34 744 Hz 8.10 KHz35 936 Hz 10.04 KHz36 1.19 KHz 12.75 KHz37 1.45 KHz 15.45 KHz38 1.77 KHz 18.45 KHz39 2.08 KHz 20.00 KHz40 2.10 KHz 21.00 KHz41 2.10 KHz 21.00 KHz1324dB/octave mono LowPassPosition Frequency1 52 Hz2 52 Hz3 54 Hz4 56 Hz5 56 Hz6 60 Hz7 64 Hz8 68 Hz9 73 Hz10 78 Hz11 85 Hz12 92 Hz13 102 Hz14 113 Hz15 127 Hz16 144 Hz17 158 Hz18 168 Hz19 175 Hz20 183 Hz21 191 Hz22 200 Hz23 210 Hz24 221 Hz25 234 Hz26 246 Hz27 260 Hz28 277 Hz29 295 Hz30 315 Hz31 337 Hz32 362 Hz33 382 Hz34 396 Hz35 410 Hz36 422 Hz37 431 Hz38 438 Hz39 444 Hz40 450 Hz41 450 HzBACK TO CONTENTS

ejectVOLUMEBASS TREBLEBALANCELEFTRIGHT1 2 3 45678TRACKFOWARD REVERSEPPI MAR KET ING DPTThere are two sets of RCA INPUTS on the front end of youramplifier. Plug the RCA cables from your head unit into theappropriate set of inputs, front and rear. If your head unitdoesn't have RCA outputs don't worry. Simply add a set ofRCA plugs (available at your dealer) to your front or rear set ofspeaker leads (see drawing below), plug them into the inputjacks, and push in the -12dB switch.SOURCE HeadunitINPUTSTrk 1(+) PositiveLEFT input(-) Negative(+) Positive(-) NegativeRIGHT inputWARNING: If you are using a source unit with bridged high powered (or"floating ground") speaker outputs, a suitable high to low level adaptermust be used. If you are unsure about your head unit see your localPrecisionPower dealer or call 1-800-62Power.Balanced Differential InputsThis circuitry reduces noise radiated into your signal cables byup to 40dB. This is equivalent to a noise reduction ofapproximately one hundred times what the noise level wouldbe without this circuitry. It provides all the benefits of a true'balanced' line without the need of any special cables (seediagram below). This type of input works with any conventionalRCA cable.music noise(+)signal and ground ( )( + =)music noise musicand noisemusicnoise(+)( - = 0 )noise ( )noise cancelsmusicNO noise14BACK TO CONTENTS

CROSSOVER OperationYour new POWERCLASS amplifier has crossover circuits built-in toprovide exceptional system flexibility without the added expense andinstallation of an outboard crossover.CHANNELS 1/2The first row of controls on the top of your Pro6800 allow youto send a variable highpass signal (20 Hz to 20 KHz) toChannels 1/2. (12dB/octave) With the X10 switch in the "out"position, crossover adjustment can be made by turning thehighpass dial up or down for crossover points between 20 Hzand 2000 Hz. By pressing the X10 switch "in" you are able tomake crossover adjustments between 200 Hz and 20 KHz. Aseparate gain control is designated for these channels andshould be adjusted according to page 16.CHANNELS 3/4The second row of controls on the top of your Pro6800 allowyou to send a variable highpass or bandpass signal (20 Hz to20K Hz) to Channels 3/4. These controls operate in the samefashion as above. The first set of controls are the highpassside of the bandpass, and the second set of controls are thelowpass side of the bandpass. In order to get a full highpass to20 KHz press the second X10 switch in and turn the second(lowpass) dial fully clockwise to 20 KHz position.CHANNELS 5/6The third row of controls on the top of your Pro6800 operate inthe same fashion as Channels 3/4 crossovers. However, youhave one more option on these channels: you can select abandpass crossover (bandpass 2 - third row) or lowpass (fourthrow). By leaving the LP/BP switch out the bandpass 2 signalwill be assigned to CHANNEL 5/6 and lowpass assigned to theRCA outputs.By pressing the LP/BP switch in, the lowpass(fourth row) will be assigned to CHANNEL 5/6 and bandpass 2assigned to the RCA OUTPUTS. The lowpass dial can beadjusted from 50 Hz to 500 Hz and provides a 24dB/octaveslope.15BACK TO CONTENTS

INPUT COMBINE and GAINInput CombineYour multi channel POWERCLASS amplifier can use bothfront and rear outputs from your head unit to maintain theability to fade front to rear, or you can run a single set ofRCAs to the front inputs and push in the COMBINE switchon the amplifier end plate to route the INPUT A signal tochannels 3/4 as well.PSC SwitchChannels 5/6 will be used as subwoofer channels in mostcases, and therefore receive summed information from InputsA and B. This allows Front/Rear fading without affecting thesubwoofer level. In order to use a PSC-221 phase shiftcontroller on bandpassed midrange drivers (Channel 3/4)without causing cancellation in your subwoofer channels, youcan isolate Inputs B to Channel 3/4 only by pushing the PSCswitch 'IN'.Adjusting The Amplifier Input Gain1. Adjust all amplifier input gain controls to just above minimumsensitivity (fully counterclockwise).2. Using the cleanest source (CD), with music playing turn upthe head unit until you can hear distortion. Now turn it downa bit until you cannot hear the distortion.3. Increase the Amplifier gain (clockwise) until the onset ofaudible distortion. Then decrease the gain to the point justbefore the distortion starts. This setting minimizesbackground noise and prevents overload.4. Repeat step 3 for any remaining amplifiers in the system.Heatsink CoolingThe unique heatsink onyour POWERCLASS amplifierhas been designed with finson the inside of the aluminummass. This allows for thetransfer of heat from thecircuitry to the heatsink finsand out through the ventsin the endplates. Be sure you have ample space around theamplifier for cooling, at least 2" on all sides.16BACK TO CONTENTS

TROUBLE SHOOTINGNO SOUND Is the LED lit?YESNOCheck Power and Remote turnonwire for voltage. Make sureGround wire is secure.WHAT COLOR ?REDGREENCentral Muting is engaged. Substitute RCA inputs withRemote turn-on wire must have another source, and connect amore than 8 volts to release known good speaker to onecentral muting. Check Remote channel.turn-on at the head unit. You mayneed to install a relay if the headunit doesn't put out sufficientvoltage.STILL NO SOUND - See your Authorized PrecisionPower Dealeror Call 1-800-62POWER.SOUND IN ONE CHANNEL ONLYReverse left and right speakers by unplugging the speakerconnector, turning it over and plugging it back in.OPPOSITE CHANNELReverse RCA inputsOPPOSITE CHANNELReverse RCAs at head unitOPPOSITE CHANNELProblem is in the head unitSOUND IS NOW INSAME CHANNELProblem is in the speaker orspeaker wire of the silentchannel.SOUND IS NOW INSAME CHANNELProblem is in the Amp. See yourlocal Authorized PrecisionPowerDealer or call 1-800-62POWER.SOUND IS NOW INSAME CHANNELProblem is in the RCA cables17BACK TO CONTENTS

TROUBLE SHOOTINGNO SOUND ON BANDPASS CHANNELSBe sure that crossover points areset properly. Is the highpass setat a higher frequency than thelowpass or the lowpass set lowerthan the highpass, creating a nopass?YESReadjust crossovers and thentest system again.STILL NO SOUND - See your Authorized PrecisionPowerDealer or Call 1-800-62POWER.NO SOUND IN BRIDGED MODENOCheck speaker wiring for shortcircuits or loose connections. Besure that powerlock plugs are inplace properly (screws facing up)and observe correct wiringdiagram.Check speaker wiring for short circuits or loose connections. Besure that powerlock plugs are in place properly (screws facing up)and observe correct wiring diagram.AMPLIFIER TURNS DOWNBoth excessive temperature and low impedance (or short circuit)conditions will activate the amplifier's AM IV protection circuitry, whichturns down the amplifier's output. When the amplifier cools down, orthe impedance is corrected, the AM IV will restore full power.If your amp is turning down check your speakers and wiring for lowimpedance and short circuits.Also,ensure that there is nothing blockingthe normal convective airflow of the amplifier. No obstruction shouldbe within 2" of the amplifier on all sides.NOTE: Low battery voltage will cause the amplifier to run warmer.18BACK TO CONTENTS

12QBASSINPUTSAL RINPUTSBOUTPUTS12dBLPowerR12dB12dBPSCLPEQ- 14RX10Sub+ejectVOLUMEDEQ-230X1025 HzPowerLow-12dbBASSTREBLEBALANCELEFTRIGHT+50 Hz12dB+12db-12db31.5 Hz1 0 HzInputSensitivityMid+12db-12db12dBEQ+63 Hz-12db+12db2 0 Hz+12db-12db40 Hz24dB1 2 3 45678TRACKFOWARD REVERSE126 HzDefeatR L-12dbTreble+12db4 0 Hz-12db++12db-12db80 Hz250 Hz+12db-12db+12db8 0 Hz-12db+12db-12db156 HzR L5 0 Hz+12db-12db+12db1.6 KHz-12db+12db-12db320 Hz1 KHz+12dbPPI MAR KET ING DPT-12db+12db3.2 KHz-12db+12db-12db635 Hz2 KHz+12db-12db+12db6.4 KHz-12db+12db-12db1.27 KHz4 KHz+12dbMade in USA-12db+12db12.8 KHz-12db+12db-12db2.5 KHz8 KHz+12db-12db+12db-12db+12db-12db5 KHz16 KHz+12db+12db-12db-12db10 KHz+12db+12db-12db20 KHz+12db-12db+12dbSYSTEM DIAGRAMONESourceTrk 1Input OutputPowerPEQ-114VolumePrecisionPowerPEQ-114 Made in USAPrecisionPowerThird Octave EqualizerDEQ-230Inputstereo • outmono • inOutputGroundRemotePowerCHANNEL 1 / 2 GAINCHANNEL 3 / 4 GAINCHANNEL 5 / 6 GAINPro6800QBASSX10 20Hz-2K200Hz-20KX10200Hz-20KX10200Hz-20K20Hz-2K20Hz-2K200Hz-20K200Hz-20K20Hz-2KCOMBINE LP / BP20Hz-2K50Hz-500HzL- L+ R+ R- L- L+ R+ R-L- L+ REM R+ R-L R L RChannel 1HighPassChannel 2HighPassChannel 3HighpassChannel 4HighpassChannel 5/6 LowpassSubwoofer SubwooferBasic System Layout19BACK TO CONTENTS

12QBASSINPUTSAL RINPUTSBOUTPUTS12dBLR12dBPowerIn-Clip12dBPSCLFFaderRRX10DefeatejectVOLUMEDEQ-230X10+25 HzPower-12dbBASSTREBLEBALANCELEFTRIGHT+50 Hz12dB+12dbInput Sensitivity1234-12db31.5 Hz+1 0 Hz+12db-12db12dB63 HzEQ-12db++12db2 0 HzR+12db-12db40 Hz24dB1 2 3 45678TRACKFOWARD REVERSEInput126 HzDefeat-12db++12db4 0 Hz-12dbL+12db-12db80 HzHigh-Mid250 Hz+12db-12db+12db8 0 Hz-12db+12db-12db156 HzR5 0 Hz+12db-12db+12db1.6 KHz-12db+12db-12db320 HzL1 KHz+12dbPPI MAR KET ING DPT-12db+12db3.2 KHz-12db+12db-12db635 HzR2 KHz+12db-12db+12db6.4 KHz-12db+12db-12db1.27 KHzL4 KHz+12dbMade in USA-12db+12db12.8 KHz-12db+12db-12db2.5 KHz8 KHz+12db-12db+12db-12db+12db-12db5 KHz16 KHz+12db+12db-12db-12db10 KHz+12db+12db-12db20 KHz+12db-12db+12dbLR201 06 0-øoLeft PhasePower1 0206 0-øoRight PhaseSYSTEM DIAGRAMTWOSourceTrk 1PAR-245VolumePrecisionPowerPAR-245 Made in USASub Low Low-Mid TrebleRearOutputFrontOutputFrequency AdjustPowerLED SelectSub Low Low-Mid High-Mid Treble PAR-245DEQ-230Inputstereo • outmono • inOutputPrecisionPowerGroundRemotePowerThird Octave EqualizerL ByPa sL Invertin • Non-inverted / Activeout • Inverted / ByPa sPSC-221PrecisionPowerR ByPa sPhase Shift ControlPSC-221 Made in USAR InvertInputGroundRemotePowerPrecisionPowerTo Inputs ATo Inputs BCHANNEL 1 / 2 GAINCHANNEL 3 / 4 GAINCHANNEL 5 / 6 GAINPro6800X10 20Hz-2K200Hz-20KX10200Hz-20KX10200Hz-20K20Hz-2K20Hz-2K200Hz-20K200Hz-20K20Hz-2KCOMBINE LP / BP20Hz-2K50Hz-500HzQBASSL- L+ R+ R- L- L+ R+ R-L- L+ REM R+ R-L R L RChannel 1HighPassChannel 2HighPassChannel 3BandPassChannel 4BandPassChannel 5/6 LowpassSubwoofer SubwooferSystem Layout Using PSC Switch20BACK TO CONTENTS

12B12dB12dBPowerIn-Clip12dBPSCFFaderRX10DefeatX10ejectVOLUME+BASSTREBLEBALANCELEFTRIGHT+12dBInput Sensitivity1234+12dB+R24dB1 2 3 45678TRACKFOWARD REVERSEInput+LHigh-MidRLPPI MAR KET ING DPTRLSYSTEM DIAGRAMTHREESourceTrk 1PAR-245VolumePrecisionPowerPAR-245 Made in USASub Low Low-Mid TrebleRearOutputFrontOutputFrequency AdjustPowerLED SelectSub Low Low-Mid High-Mid Treble PAR-245CHANNEL 1 / 2 GAINCHANNEL 3 / 4 GAINCHANNEL 5 / 6 GAINPro6800QBASSQBASSINPUTSAL RL- L+ R+ R- L- L+ R+ R-L- L+ REM R+ R-X10 20Hz-2K200Hz-20KX10200Hz-20KX10200Hz-20K20Hz-2K20Hz-2K200Hz-20K200Hz-20K20Hz-2KCOMBINE LP / BP20Hz-2K50Hz-500HzRCA Output Bandpass12dB/OctaveL R L RINPUTSOUTPUTSPC AMPChannel 1HighPasstweeterChannel 2HighPasstweeterChannel 3BandPassMidrangeChannel 4BandPassMidrangeMidBassMidBass4Ω SUB4Ω SUBChannel 5/6 LowpassSub Woofers 24dB/OctaveFour-Way System Layout with MidBass Amp21BACK TO CONTENTS

12BLR12dB12dB12dBRLPSCX10X10ejectVOLUME20Hz-70HzPowerL40Hz-130HzHBASSTREBLEBALANCELEFTRIGHTQ12dBL80Hz-260Hz1.5HQEQ12dBL4160Hz-550Hz1.5HCut / B ostDefeatQ24dB1 2 3 45678TRACKFOWARD REVERSEL4-12db30Hz-1KHz1.5HCut / B ost+12dbQL4-12db940Hz-1.25KHz1.5HCut / B ost+12dbQL4-12db1.95KHz-4.5Khz1.5HCut / B ost+12dbPPI MAR KET ING DPTQL4-12db4KHz-9.37KHz1.5HCut / B ost+12dbQL4-12db9.37KHz-15.75KHz1.5HCut / B ost+12dbQL4-12db14KHz-23.37KHz1.5HCut / B ost+12dbQL4-12db1.5HCut / B ost+12dbQ4-12db1.5Cut / B ost+12db4-12dbCut / B ost+12db-12db+12dbLR201 06 0-øoLeft PhasePower1 0206 0-øoRight PhaseSYSTEM DIAGRAMFOURPMQ-210Inputa tenuation stereo•out-12dB in mono•inPrecisionPowerOutputPMQ-210GroundRemotePowerSourcePrecisionPowerTrk 110 Band Parametric Equalizer Made in USAL ByPa sL Invertin • Non-inverted / Activeout • Inverted / ByPa sPSC-221PrecisionPowerR ByPa sPhase Shift ControlPSC-221 Made in USAR InvertInputGroundRemotePowerTo Inputs BPrecisionPowerTo Inputs ACHANNEL 1 / 2 GAINCHANNEL 3 / 4 GAINCHANNEL 5 / 6 GAINPro6800QBASSQBASSINPUTSAL RL- L+ R+ R- L- L+ R+ R-L R L RL- L+ REM R+ R-INPUTSOUTPUTSX10 20Hz-2K200Hz-20KX10200Hz-20KX10200Hz-20K20Hz-2K20Hz-2K200Hz-20K200Hz-20K20Hz-2KCOMBINE LP / BP20Hz-2K50Hz-500HzRCA Output Lowpass24dB/OctavePC AMPChannel 1HighPasstweeterChannel 2HighPasstweeterChannel 3BandPassMidrangeChannel 4BandPassMidrangeChannel 5BandPassMidBassChannel 6BandPassMidBass8Ω SUB8Ω SUBFour-Way System Layout using a separate PC amp for Subs22BACK TO CONTENTS

12QBASSINPUTSAL RINPUTSBOUTPUTS12dB12dB12dBPSCX10X1012dB12dB24dBLRPowerIn-ClipRLFFaderRDefeatejectVOLUME20Hz-70HzPower+BASSTREBLEBALANCELEFTRIGHT+QInput Sensitivity1234+40Hz-130Hz80Hz-260Hz160Hz- 50HzQ+RQ1 2 3 45678TRACKFOWARD REVERSEInput+LHigh-MidQRQPPI MAR KET ING DPTL30Hz-1KHz940Hz-1.25KHz 1.95KHz-4.5Khz 4KHz-9.37KHz 9.37KHz-15.75KHz 14KHz-23.37KHzLHLHLHLHLHLHLHLHLHLH12QBASSCut / B ostCut / BoostCut / B ostQ1.541.541.541.541.541.541.541.541.541.54INPUTSACut / B ostEQDefeatL RRCut / B ostQLCut / B ostQ-12db+12db -12db+12db -12db+12db -12db+12db -12db+12db -12db+12db -12db+12db -12db+12db -12db+12db -12db+12dbINPUTSBOUTPUTSCut / B ostQCut / B ostQCut / B ost12dBCut / B ost12dB12dBPSCX10X1012dB12dB24dBSYSTEM DIAGRAMFIVESourceTrk 1PAR-245VolumePrecisionPowerPAR-245 Made in USASub Low Low-Mid TrebleRearOutputFrontOutputFrequency AdjustPowerLED SelectSub Low Low-Mid High-Mid Treble PAR-245PMQ-210Inputa tenuation stereo•out-12dB in mono•inPro6800PrecisionPowerOutputPMQ-210GroundRemotePowerPrecisionPower10 Band Parametric Equalizer Made in USALeftY-cordsRightPro6800Y-cordsCHANNEL 1 / 2 GAINCHANNEL 3 / 4 GAINCHANNEL 5 / 6 GAINCHANNEL 1 / 2 GAINCHANNEL 3 / 4 GAINCHANNEL 5 / 6 GAINX10 20Hz-2K200Hz-20KX10200Hz-20KX10200Hz-20K20Hz-2K20Hz-2K200Hz-20K200Hz-20K20Hz-2KCOMBINE LP / BP20Hz-2K50Hz-500HzX10 20Hz-2K200Hz-20KX10200Hz-20KX10200Hz-20K20Hz-2K20Hz-2K200Hz-20K200Hz-20K20Hz-2KCOMBINE LP / BP20Hz-2K50Hz-500HzQBASSQBASSL- L+ R+ R- L- L+ R+ R-L- L+ R+ R- L- L+ R+ R-L- L+ REM R+ R-L- L+ REM R+ R-L R L RL R L RLeft FrontHighPass200W bridgedChannels 1/2Right FrontHighPass200W bridgedChannels 1/2Left RearHighPass200W bridgedChannels 3/4Right RearHighPass200W bridgedChannels 3/44Ω SUB 4Ω SUB 4Ω SUB 4Ω SUB2Ω 400W bridged Channels 5/62Ω 400W bridged Channels 5/6Two Pro6800 Amps bridged for Left and Right channels23BACK TO CONTENTS

BLOCK DIAGRAMPro6800INPUTS AINPUTS BOUTPUTSLRLRLRDif.Dif.Dif.Dif.outinoutininoutinoutCrossoverSelect Switchinputcombineout in outinPSC SWITCH24 dB/octave Low Pass50Hz - 500HzQBASSPLUSinQBASS REMOTEoutoutin12 dB/octave High Pass20Hz - 2KHzx10 200Hz - 20KHz12 dB/octave High Pass20Hz - 2KHzx10 200Hz - 20KHz12 dB/octave High Pass20Hz - 2KHzx10 200Hz - 20KHz12 dB/octave High Pass20Hz - 2KHzx10 200Hz - 20KHz12 dB/octave High Pass20Hz - 2KHzx10 200Hz - 20KHz12 dB/octave High Pass20Hz - 2KHzx10 200Hz - 20KHz12 dB/octave Low Pass20Hz - 2KHzx10 200Hz - 20KHz12 dB/octave Low Pass20Hz - 2KHzx10 200Hz - 20KHz12 dB/octave Low Pass20Hz - 2KHzx10 200Hz - 20KHz12 dB/octave Low Pass20Hz - 2KHzx10 200Hz - 20KHzInverterInverterInverterGainAdjustGainAdjustGainAdjustmute AMPCHANNEL 1/2muteAMPmute AMPCHANNEL 3/4muteAMPmute AMPCHANNEL 5/6muteAMPINPUT ATTENUATIONMUTE24BACK TO CONTENTS

WARRANTYThree-Year Limited U.S.A. WarrantyThis warranty gives you specific legal rights, and you may also have other rights which vary fromstate to state. PrecisionPower warrants its products to be free from defects in materials andworkmanship under normal use and service for a period of three (3) years from the date oforiginal purchase when the unit is installed by an Authorized Dealer. Non-Authorized Dealerinstalled products carry a one (1) year parts and ninety (90) days labor limited warranty. Theextent 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’s examination discloses to be defectiveand under warranty, provided the defect occurs within three (3) years from the date of originalpurchase when the unit is installed by an Authorized Dealer and the product is returned immediatelyto PrecisionPower. This warranty is not transferable.2. Non-Authorized Dealer Installed Products: PrecisionPower will either repair or replace at nocharge, to the original purchaser, any unit which PrecisionPower’s examination discloses to bedefective and under warranty, provided the defect occurs within ninety (90) days from the date ofpurchase and the product is returned immediately to PrecisionPower. Warranty claims beyondninety (90) days for Non-Authorized Dealer Installed Products will be for parts only and willextend for one (1) year from the date of purchase. This warranty is not transferable.3. The date of purchase and proof of Authorized Dealer Installation of a PrecisionPower productmust be established by an original sales receipt which must accompany the article being returnedfor warranty work.4. This warranty shall NOT apply to any PrecisionPower product found to have the original factoryserial number removed or defaced. All products received (by PrecisionPower) for in warrantyor out of warranty repair, with their original serial numbers removed or defaced, will NOT berepaired and will be returned to sender, freight collect. Refer to original packaging for the serialnumber of your component speakers.5. The provisions of this warranty shall not apply to any PrecisionPower product used for apurpose for which it is not designed, which has been repaired or altered in any way, or which hasbeen connected, installed, or adjusted other than in accordance with the instructions furnished inPrecisionPower’s owner’s manual. Nor shall this warranty apply to any part which has beensubject to misuse, neglect, or accident.6. PrecisionPower does not authorize any other persons to assume any other liability in connectionwith its products. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY MADE BYPRECISIONPOWER APPLICABLE TO ITS PRODUCTS. ANY IMPLIED WARRANTY OR MER-CHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE APPLICABLE TOPRECISIONPOWER PRODUCTS IS LIMITED IN DURATION TO THE DURATION OF THISLIMITED WARRANTY. PRECISIONPOWER SHALL NOT BE LIABLE FOR THE INCIDENTAL,CONSEQUENTIAL, OR COMMERCIAL DAMAGES RESULTING FROM THE BREACH OF THISWRITTEN WARRANTY. Some states or provinces do not allow the exclusion or limitation ofincidental or consequential damages or limitations on how long an implied warranty lasts; so theabove limitations or exclusions may not apply to you.7. Your product will be serviced on an in-warranty basis within the warranty period for the correctionof warranted defects. If improper operation of your PrecisionPower product should occur,contact your Authorized Dealer for assistance with the return and factory repair of yourPrecisionPowerproduct. If an Authorized Dealer is not available, return the unit including your name, telephonenumber, return address, a copy of your sales receipt, and a description of the problem to:PrecisionPower,Inc.Service Department4829 S. 38th StreetPhoenix, AZ 85040-2964TO RETURN PRECISIONPOWER PRODUCTS OUT OF WARRANTY: Return the unit, postageprepaid, in the original protective carton. Please include a description of the problem and, ifdesired, 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 bereturned with an itemized statement, C.O.D.BACK TO CONTENTS