Your New! PCX™ amplifier has a TC-XCrossover (Total Control X-over©) 30- 4kHz (See page 19 for crossover Detent Chart). 12dB per octave phase correlat- ed 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 depending to the HP/LP/Full switch on the front endplate. You would choose low pass (switch middle) to use this amp for subwoofers, 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 Diagrams beginning on page 15 show several ways to use the virtually unlimited PCX™ amplifiers internal crossovers in your system.

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 (usually just below full volume).

3.Increase the Amplifier gain (clockwise) until the onset of audible distortion. Then decrease the gain to the point just before the distortion starts. This setting minimizes background noise and prevents overload.

4.Repeat step 3 for any remaining amplifiers in the system.

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 the speaker outputs.

3.Crossover Frequency Selector Control: Use this control to adjust the crossover frequency for the speaker output. (See Crossover frequency chart pg.19)

4.RCA Inputs: Connect the RCA cables from source unit, or line driver to these RCAconnectors.

5.Gain Control: Use this control to match the output level of the source-unit to the input of the amplifier.

6.-12dB Input Attenuation: Push this switch ‘IN’ for high voltage input (4V-12V) capability. This button pushed ‘IN’ must be used for speaker level input on common ground head-units or for high voltage line drivers.

PCX 250, 280 Control Panel

7.QBASS™ Frequency Control: Buttons 1 and 2 offer the capability of selecting 30, 36, 44, or 60Hz to boost by the QBASS™ Control. (See page #2)

8.Output Crossover HP/LP/FULL Select Switch: Adjust this switch to select the HP/LP/FULL function for the RCAoutputs.

9.Output Crossover Frequency Knob: Use this control to adjust the crossover frequency for the RCAoutput. (See Crossover frequency chart pg.19)

10.RCA Outputs: Left and right RCA outputs provide HP/LP/Full; 30-4KHz to another amplifier.

11.Speaker Output Connections: Plug the speaker PowerLock™ connector in here.

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Precision Power PCX 280 manual PCX 250, 280 Control Panel
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PCX 250, PCX 280 specifications

Precision Power is a renowned name in the audio industry, offering high-performance amplifiers that cater to both casual listeners and audiophiles. Two standout products in their lineup are the PCX 280 and PCX 250 amplifiers. Each model is designed to deliver exceptional sound quality, impressive power output, and innovative technologies that elevate the listening experience.

The PCX 280 is a powerhouse amplifier, capable of delivering up to 280 watts of peak power. This amplifier is designed to drive high-performance speakers and subwoofers, making it ideal for those seeking a dynamic audio experience. The PCX 280 features a Class D amplifier topology, which ensures high efficiency and low heat generation. This allows users to enjoy long listening sessions without the worry of overheating or distortion. Additionally, the PCX 280 incorporates a built-in crossover network, enabling precise frequency separation between different audio components for a clearer soundstage.

On the other hand, the PCX 250 is a slightly more compact but equally powerful option, with a peak output of 250 watts. This amplifier is perfect for smaller audio systems or casual listening environments, providing ample power without compromising sound quality. Like the PCX 280, the PCX 250 uses Class D technology, ensuring efficiency and minimal power loss. Its design also features a variable gain control, allowing users to fine-tune the output level to match their specific needs.

Both models showcase Precision Power's trademark quality and attention to detail. The robust construction of the PCX amplifiers includes a sturdy chassis designed to reduce vibrations and unwanted resonance, further enhancing audio clarity. The intuitive interface, complete with well-placed controls and LED indicators, allows users to easily adjust settings and monitor performance.

In terms of connectivity, both amplifiers offer versatile input options, including RCA and speaker-level inputs, making them compatible with various audio sources. These amplifiers also feature durable binding posts for speaker connections, ensuring a secure connection that maximizes sound transmission.

In summary, the Precision Power PCX 280 and PCX 250 amplifiers are exceptional choices for anyone seeking superior audio performance. With their advanced Class D technology, solid construction, and user-friendly features, both models provide powerful and clear sound, making them ideal companions for music enthusiasts and audiophiles alike. Whether you opt for the powerhouse PCX 280 or the compact yet capable PCX 250, you can trust that you're investing in quality audio equipment designed to enhance your listening experience.
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