Precision
Power
9235 South McKemy Street, Tempe, Arizona 85284 www.precisionpower.com
8900-4005
PC
X
250
280
Page 1: ...PrecisionPower 9235 South McKemy Street Tempe Arizona 85284 www precisionpower com 8900 4005 PCX 250 PCX 280 ...
Page 2: ...mentation Input Stage NEW 12dB Octave HP LP FULL 30 4kHz Crossover NEW Independent Line Output Crossover 30 4kHz Adaptive PWM Power Supply Triple Darlington Output Stage AP IV Protection Circuitry Forced Air Thermal Management PCX 280 QBASS Bass Boost PCX 250 QBASS Plus Bass Boost PCX 280 High Voltage Input Capability with 12dB Attenuation Switch Gold Plated RCAInput and Output Connectors PowerLoc...
Page 3: ...tion block near your amplifiers to distribute large gauge power cable to multiple amplifiers 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 detail 2 Ring connectors large enough to accommodate your method of grounding In line fuse or c...
Page 4: ...e 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 5 Warning A Main Fuse must be installed within 18 of battery 16 ...
Page 5: ...t 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 NO SOUND Is the LED lit YES NO...
Page 6: ...ndent selection of frequencies from 30 4kHz See page 19 NOTE The System Diagrams beginning on page 15 show several ways to use the virtually unlimited PCX amplifiers internal crossovers in your system 12 1 Cooling Plenums Maintain a minimum 2 clearance around cooling plenums for proper amplifier cooling 2 Crossover HP LP FULL Select Switch Adjust this switch to select the HPF LPF FULLfunction for ...
Page 7: ...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 10 The Advanced Instrumentation Input has trickled down from the 15 000 PrecisionPower2500F1 This circuit completely isolates the chassis ground from the audio circuit of the amplifier and reduces...
Page 8: ... temperature 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 The New PCX amplifiers mass has been increased by 2 lbs per linear foot over las...
Page 9: ...ilicone or some similar material to prevent rust from developing on the bare metal If your grand total current draw is over 50 amps or total output 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 ...
Page 10: ...6 6 Amps Total current draw 12V If 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 effectively double their power at this load 160W x 2 x 2 640W 640W 53 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 gran...
Page 11: ...r circuit In doing this PrecisionPower engineers have allowed you to daisy chain your RCAoutput to the next amplifier input causing the first amplifier s Q BASS Remote to become the master control amplifier See your Authorized PrecisionPower Dealer for more information See diagram pg 18 Q BASS Settings 1 2 Freq IN IN 30Hz IN OUT 36Hz OUT IN 44Hz OUT OUT 60Hz 2 19 QBASS Plus PCX 280 Up to 18dB of B...
Page 12: ...l 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 aPrecisionPower product must be established by an original sales receipt whi...
