Operating Manual - PQX 571 and PQX 572 Parametric Equalizer

8.TROUBLESHOOTING TIPS

8.1No Output

Check AC power - is the Power LED on? Check in/out connections -are they reversed? Are you sure you have an input signal?

8.2Eq Controls Do Nothing

Is the master EQ in/out switch in? Maybe the bandwidth setting is too sharp to produce an audible change. The center frequency and bandwidth controls do not have an effect if the level control is set at “0”, or if the in/out switches are switched out.

8.3Clip Light Flashes or Stays On

If the clip light flashes, the signal level to the equalizer is too high. Turn down the level on the unit feeding the PQX equalizer. If the clip LED is on all the time, disconnect the input and output cables. If it is still on, the unit must be returned for service.

8.4Distorted Sound

This will only be caused by too much signal which will show on the clip light. If the light is not flash- ing, there is an overload somewhere else in the signal chain. Adjust the gain of each component in your signal chain until the unit which is distorting is found.

8.5Excessive Hum or Noise

Hum will usually be caused by a “ground loop” between components. Try using the suggested balanced input and output connections if the other pieces of equip- ment used in conjunction with your equalizer have bal- anced inputs and outputs. Noise (too much hiss) can be caused by insufficient drive signal. Make sure you are sending a nominal 0 dBu line level signal to the equal- izer.

The input ground to chassis ground jumper strap supplied with the equalizer should normally be left in place to minimize ground loop voltage and for safety reasons. If hum or buzz noise is still heard after you have installed balanced input and output connections using good quality shielded cable, the ground strap may be removed to re- duce hum caused by ground loop current.

Note: unshielded cables, improperly wired con- nections, and cable with broken strands (shorts, etc.) are the most common problems. Make sure you use good qual- ity cable with connectors soldered firmly on the correct pin. When in doubt, get in touch with your Ashly dealer, or call the factory direct - (800) 828-6308.

9.DIMENSIONAL DIAGRAM

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Ashly PQX-572, PQX-571 manual Troubleshooting Tips, Dimensional Diagram
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PQX-571, PQX-572 specifications

The Ashly PQX-572 and PQX-571 are advanced audio processing devices designed to enhance sound quality in professional audio applications. Known for their exceptional performance and reliability, these two models are vital tools for sound engineers and audio professionals. Both devices integrate cutting-edge technologies that enable them to deliver superior sonic precision.

Starting with the Ashly PQX-572, this model serves as a 2-channel parametric equalizer that offers extensive control over audio frequencies. One of its standout features is the adjustable Q factor, which allows users to fine-tune the bandwidth of each frequency band. This feature enables precise adjustments, making it easier to eliminate unwanted resonances or enhance desirable frequencies. The PQX-572 also incorporates 20 Hz to 20 kHz frequency ranges, which ensure that audio processing can be applied across the audible spectrum, accommodating diverse audio sources.

Equipped with high-headroom circuitry, the PQX-572 provides low distortion levels, allowing for clean and transparent audio processing. Its front panel includes intuitive rotary controls for gain, frequency, and Q, enabling real-time adjustments during any audio session. Additionally, the device features bypass switches for each channel, providing flexibility when comparing processed and unprocessed audio.

On the other hand, the Ashly PQX-571, a single-channel version, shares many features with its twin yet possesses its unique strengths. This model is especially beneficial in setups where space is a concern since it occupies a single rack unit. The PQX-571 is ideal for musicians, small venues, and mobile setups that require high-quality sound processing without extensive equipment.

The PQX-571 maintains the same stellar audio performance found in the PQX-572, offering discrete, high-performance circuitry and low-noise operation. It also provides similar capabilities in frequency adjustment, emphasizing the importance of flexibility in audio manipulation. Both models are ruggedly built, making them suitable for various environments, from recording studios to live sound applications.

In summary, the Ashly PQX-572 and PQX-571 are robust audio tools designed for precise sound control and exceptional audio quality. Their intuitive interfaces and advanced features make them essential components for any audio professional looking to elevate their sound production capabilities. Whether in a recording studio, live venue, or mobile setup, these devices deliver performance and reliability that audio engineers can trust.
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