Instruction/ maintenance manual of the product DCX 800.5 Precision Power
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AMPLIFIER MODELS DCX 300.4 DCX 600.4 DCX 800.5 DCX 1000.4.
T ABLE OF CONTENTS Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Ser vice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Caution . . . . . . . . . . . . . .
CONGRA TULA TIONS Thank you f or choosing Precision P o wer TM audio equipment. Designed and engineered in the USA, this product combines innov ativ e technology with the finest materials to consistently deliver Absolutely State of the Ar t ™ perf or mance, sound quality , reliability , and v alue.
FEA TURES Advanced Instrumentation Input Stage TC-X Crosso ver 12dB/Octav e; HP/LP/FULL; 30-4kHz Crossover Adaptive PWM P ower Supply (DCX 300.4, DCX 600.4, DCX 800.5) AP-IV Protection Circuity Fully Regulated PWM P o wer Supply (DCX 1000.4) Fully Complementar y Darlington Output Stage F orced Air Thermal Management ( DCX 1000.
QB ASS TM Up to +18dB @ 40Hz QB ASS PLUS TM Up to +18dB Boost @30, 36, 44, or 60Hz Crossov ers 12dB/Octav e Crossov er F requency 30-4kHz Idle Current: DCX 300.4 2 Amps DCX 600.4 2.5 Amps DCX 1000.4 3 Amps DCX 800.5 2.5 Amps Dimensions Length Width Height DCX 300.
5 AMPLIFIER ST A TUS LEDS The LEDs provide the f ollowing indications: 1. P ower - This LED illuminates RED when the amplifier power is tur ned on with the remote input (output muted). After a shor t time dela y this LED will tur n GREEN (amplifier ready).
QB ASS/QBASS PLUS SPECIFICA TIONS QB ASS TM ( DCX 300.4 ) Up to 18dB of boost centered at 40Hz, with a Q-f actor of 2. QB ASS PLUS TM ( DCX 600.4, 1000.4, 800.5 ) Up to 18dB of boost with selectable center frequency at 30Hz, 36Hz, 44Hz or 60Hz, with a Q-f actor of 2.
WIRING Bef ore beginning, disconnect the negativ e (-) ter minal of the batter y prior to connecting the amplifier to the positive (+) 12V terminal to pre v ent a shor t to ground and potential damage to wiring and equipment.
same precautions f or routing these wires that you f ollow ed f or running the power and remote turn on wires. Cut off e xcess and, using wire strippers, strip 1/4-inch of insulation. Locate the speaker/remote turn-on P ower Loc k TM connector . Loosen the outer screws on the underside of the connector .
GROUND WIRING Locate an area near the amplifier(s) that is metal and clean an area about the size of a quar ter down to bare metal. Inspect the area around and under neath to be sure you will not drill into wires, brak e or fuel lines, etc. Dr ill a pilot hole in the middle of this area.
CURRENT DRA W The f ollowing is a basic f or mula to be used as a guide to deter mine current dra w . Y our ne w 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 improv e the current transf er of your system.
PO WER WIRE SIZE A minimum of 8 gauge or a maximum of 4 gauge wire is recommended dependent on the application. The ground wire must be the same gauge as the po wer wire. PO WER LOCK CONNECT ORS Once you ha ve run both the pow er and ground wires, then connect the cables to the amplifier .
modules. This feature permits the creation of a mono channel for a suitable subw oof er or center channel. Der iving the mono channel is accomplished by using the Left Channel P ositive wire (L+) as the positiv e speaker wire and the Right Channel Negativ e wire (R-) as the negativ e speaker wire .
DCX 300.4 FRONT PLA TE DIA GRAM 1. Cooling Plenums: Maintain a minimum 2” clearance around cooling plenums f or proper amplifier cooling. 2. Rear Speaker Connector: Plug in the P ower Loc k TM connector here. 3. Front Speaker/Remote Connector: Plug in the P ower Loc k TM connector here.
to use the inter nal signal path from the front crossov er f or the rear input, or the EXT position to use the e xter nal rear RCA input. 13. Source HP/LP/FULL Switc h: Select the desired setting. HP/LP/FULL f or the internal signal from the front channel to the rear channel when not using an e xter nal rear RCA input.
2. Cooling Plenums: Maintain a minimum 2” clearance around cooling plenums f or proper amplifier cooling. DCX 600.4 AND DCX 1000.4 FRONT PLA TE DIA GRAM 1. Cooling Plenums: Maintain a minimum 2” clearance around cooling plenums f or proper amplifier cooling.
setting. HP/LP/FULL for the speak er output signal of the front channel. 13. Rear Sour ce INT/EXT Switch: Select the INT position (s witch in) if you w ant to use the inter nal signal path from the front crossov er f or the rear input, or the EXT position (s witch out) to use the e xter nal rear RCA input.
DCX 800.5 FRONT PLA TE DIA GRAM 1. Cooling Plenums: Maintain a minimum 2” clearance around cooling plenums f or proper amplifier cooling. 2. Sub Speaker Connector: Plug in the P ower Loc k TM connector here. 3. Rear Speaker Connector: Plug in the P ower Loc k TM connector here.
12. Front HP/LP/FULL Switc h: Select the desired crossov er setting. HP/LP/FULL for the speak er output signal of the front channel. 13. Rear Input INT/EXT Switch: Select the INT position if you w ant to use the inter nal signal path from the front crossov er f or the rear input, or the EXT position to use the e xter nal rear RCA input.
DCX 600.4, DCX 800.5, DCX 1000.4 END PLA TE DIA GRAM 1. P ower/Gr ound Po w e r Lock TM : After you ha ve securely connected your po wer and ground wires, plug in the P ower/Ground Po w e r Lock TM connector here. 2. QB ASS REMO TE TM : Plug in the data cable from the optional QB ASS REMO TE TM dash mounted le v el control here.
DCX 300.4, 600.4, 1000.4 BLOCK DIA GRAM INPUT A TTENUA TION INPUT A TTENUATION 20.
DCX 800.5 BLOCK DIA GRAM 21.
AD V ANCED INSTRUMENT A TION INPUT The Adv anced Instrumentation Input has been incor porated from the legendar y Precision P ower TM 2500F1 . This circuit completely isolates the chassis ground from the audio circuit of the amplifier and reduces noise radiated into y our signal cables b y up to 40dB.
QB ASS PLUS On DCX 600.4 , DCX 800.5 , and DCX 1000.4 amplifiers, w e’ve tak en bass control to a higher le v el with QB ASS PLUS TM . The two QB ASS TM s witches (labeled 1 and 2) on the front end of the amplifier allow y ou to select one of four frequency centers 30Hz, 36Hz, 44Hz and 60Hz.
Y our ne w DCX amplifier has a TC-X Crossov er (T otal Control X- over ® ) 30Hz-4kHz (see this guide for Crosso ver Chart).12dB per octav e phase correlated crossov er built-in to provide superior system fle xibility without the added e xpense and installation of an outboard crossov er .
25 CROSSO VER DETENT CHART Detent # Low P ass F requency (Hz) @ -3dB High P ass F requency (Hz) @ -3dB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 3.
INPUT COMBINE Y our m ulti-channel DCX amplifier can use both front and rear outputs from your head unit to maintain the ability to f ade front to rear , or y ou can r un a single set of RCAs to the front inputs and push in the Rear Input INT/EXT s witch on the amplifier endplate to route the front signal to the rear channels as well.
through the low er intake v ents on the endplate. This cool air flows below the circuit board, through the f an and across the inter nal fins, cooling the heatsink.
28 TROUBLESHOO TING NO SOUND Is the LED illuminated? YES NO Check P ower and Remote tur n-on wire f or voltage . Make sure the g round wire is secure. STILL NO SOUND See your A uthor ized Precision P ower TM Dealer or call 1-800-62PO WER.
LIMITED TWO YEAR CONSUMER W ARRANTY : Directed Electronics, Inc. promises to the or iginal purchaser , to replace this product should it prov e to be defectiv e in workmanship or material under nor ma.
An important point after buying a device Precision Power DCX 800.5 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Precision Power DCX 800.5 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Precision Power DCX 800.5 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Precision Power DCX 800.5 you will learn all the available features of the product, as well as information on its operation. The information that you get Precision Power DCX 800.5 will certainly help you make a decision on the purchase.
If you already are a holder of Precision Power DCX 800.5, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Precision Power DCX 800.5.
However, one of the most important roles played by the user manual is to help in solving problems with Precision Power DCX 800.5. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Precision Power DCX 800.5 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
