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Precision Power PCX 280 manual

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Table of contents for the manual

  • Page 1

    Precision Power 9235 South McKemy Street, T empe, Arizona 85284 www.precisionpower.com 8900-4005 PC X 250 PC X 280[...]

  • Page 2

    Power Bandwidth 10 Hz - 50 kHz T otal Harmonic Distortion < 0.02 % S/N Ratio > 110dB Input T opology Instrumentation Input Sensitivity 150mv - 12 Volts RMS Input Impedance 10k Ohms Load Impedance (stereo) 2 - 8 Ohms Load Impedance (bridged) 4 - 8 Ohms Supply Voltage 1 1 - 15 Volts Damping Factor >500 Slew Rate >50 V/µS QBASS™ Up to +[...]

  • Page 3

    Y ou 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 amplifie[...]

  • Page 4

    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.[...]

  • Page 5

    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 Power Lock power and ground connector (supplied). With a small flat bladed screw driver , loosen the screws before a[...]

  • Page 6

    9 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 ( u s u a l l y just below full volume). 3. Increase the Amplifier g[...]

  • Page 7

    All two-channel PCX ™ amplifiers are capable of being bridged into a 4 ohm mono output without switches or bridging modules. This feature permits the creation of a mono channel for a subwoofer or center channel. Deriving the mono channel is accomplished by using the Left Channel Positive wire ( L + ) as the positive speaker wire and the Right Cha[...]

  • Page 8

    1. Cooling Plenums: Maintain a minimum 2” clearance around cooling plenums for proper amplifier cooling. 2. QBASS™ Control: Add more bass to the system by turning this control clock - wise to boost the selected QBASS™ frequency up to 18dB. 3. QBASS™ Remote Port: Port to plug in the optional QBASS Plus™ Remote knob. 4. Power & Ground C[...]

  • Page 9

    I f 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 t[...]

  • Page 10

    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 P C X ™ a m p l i f i e r 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[...]

  • Page 11

    QBASS™ (PCX 250) Up to 12dB of Boost centered at 40Hz, 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 endplate. P r e c i s i o n P o w e rP C X ™ amplifiers no longer need an optional Q P O RT ™ to connect m u l t i p l e QBASS PLUS™ equipped amplif[...]

  • Page 12

    Do not attempt to service P r e c i s i o n P o w e r products yourself. Performing exploratory surgery on your audio equipment yourself will void the warranty. Many parts of your P r e c i s i o n P o w e r 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 [...]