The DEQ-230Equalizer puts an incredible amount of control in your hands. Correctly adjusted, it can solve many of the problems you will encounter along your road to perfect sound. Incorrectly adjusted, it can cause just as many problems. By following these guidelines, you will avoid common pitfalls in system tuning and get your sound quickly dialed in. We recommend that you use a Real Time Analyzer (RTA) to speed things up, but it is possible to tune your system without it.

1)With the system turned OFF, remove the control panel from the chassis of the DEQ-230, replace the short connecting cable with the 20' cable, and take the control panel to the adjusting location (either inside the car or next to the RTA).

NOTE: If you are using a Real Time Analyzer (RTA), go to step 2. If not, go to step 8.

2)The first step is to locate a suitable source of “pink noise.” A good choice would be the current IASCA competition reference disc. Also, some RTAs have a built-in pink noise source. Ideally, the pink noise should play through your head unit, allowing you to compensate for any frequency response changes caused by it, or anything else, before the amplifiers.

3)Next, place the microphone from the RTA in the driver's seat at approximately head level. Initially, set the analyzer to read at 3dB per step, and set the speed of the RTA’s readout to "medium." Turn on your system and start the pink noise.Raise or lower the volume until you can see all (or most) of your frequency response on the RTA scale (a little above or below is OK). Make sure all of the equalizer's frequency controls are at zero and look at the RTA screen.

4)You are trying to achieve a target frequency response, or "curve" that reflects your preference. You might think that a perfectly straight line would be best, but it really doesn't sound very good. Instead, shoot for a curve that starts about 9dB up at the low frequencies (25Hz to about 100Hz) dropping gently to 0dB

in the midrange (250Hz to 3KHZ), then dropping gently to -9dB at 16KHZ and 20KHz.

5)If electronic crossovers are used, any large frequency sections corresponding to your crossover points that are low or high should be brought in line using crossover level controls or amp gain adjustments, not with the equalizer.

6)Beginning at either the lowest or the highest frequency, adjust the control on the DEQ-230that corresponds to a large peak or dip on the RTA display until it moves into line with adjacent frequencies. Move to the next frequency and repeat until you run out of frequencies to adjust. Try to remove the peaks before filling the dips. Periodically, while you are making adjustments, compare the new curve you are making to the system in an unequalized state by using the defeat switch on the lower left corner of the control panel. This allows you to compare your original starting point to the present state of equalization in the system.

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Precision Power DEQ-230 manual
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DEQ-230 specifications

The Precision Power DEQ-230 is a state-of-the-art digital EQ designed for those who demand the highest quality in their audio systems. This unit stands out in the realm of equalizers, offering a myriad of features and advanced technologies that enhance audio playback like never before.

One of the main features of the DEQ-230 is its 31-band graphic equalization capability, which allows users to fine-tune their audio experience with remarkable precision. Each band provides a level of control that can adjust frequencies ranging from 31.5 Hz to 16 kHz. This comprehensive range empowers users to tailor their sound to suit various music genres and listening environments.

The DEQ-230 also incorporates a unique digital signal processing technology that ensures superior sound quality. With its low total harmonic distortion (THD) and an excellent signal-to-noise ratio (SNR), this equalizer maintains the integrity of the original audio signal while allowing for significant customization. The built-in digital sound processor provides users with advanced filtering options that can create a more immersive listening experience.

Another notable characteristic of the DEQ-230 is its user-friendly interface. The LCD display provides clear visual feedback, allowing easy navigation and adjustment of settings. Users can switch between presets or create their custom profiles. Combining convenience with functionality, the DEQ-230 features onboard remote control compatibility, making it accessible even from a distance.

In terms of connectivity, the DEQ-230 offers multiple input and output options, including RCA inputs and outputs, making it versatile for various setups. This capability allows the equalizer to be seamlessly integrated into existing audio systems, whether for home theaters, recording studios, or professional audio installations.

The build quality of the DEQ-230 is up to par with its features, exuding durability and reliability. The chassis is designed to minimize vibration interference, which can affect audio clarity. This attention to detail ensures that the Precision Power DEQ-230 is not just an equalizer but a long-term asset for any audiophile or audio professional.

In conclusion, the Precision Power DEQ-230 is a remarkable digital equalizer that combines advanced technology with user-friendly features to deliver exceptional audio performance. It caters to both enthusiasts and professionals, making it an essential tool for those looking to elevate their sound experience.
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