3 Basics of Equalization

Basic operation: Edit mode

If you're not already there, exit to Program mode by using the [LINK/EXIT] button. Then select program 00 on the DEQ230 by pressing the [DOWN] and [UP] buttons at the same time.

Program 00 is a "flat" program, and it's easy to see why it's called that: the gain setting for every band is 0 dB. Calling up this program is almost the same as pressing the Bypass button, in that the audio passing through the unit will not be equalized in any way. Of course, the difference is that you can edit the program and hear the changes that you make. If you don't already know what kind of EQ you're looking for, this may be a good place to start.

Single Band Edit

Pressing a [BAND SELECT] button puts the DEQ230 into Edit mode. The Numeric LED Display will change from the current program number to the gain value in decibels (dB) of the band you just selected. In addition, one of the Band Gain LEDs above that [BAND SELECT] button will start blinking. If the gain value of that band is 0 dB, the green LED will blink. This means there is no gain change occurring in this frequency range. If it is higher or lower than that, one of the yellow LEDs will blink. This indicates that some amount of cut or boost is happening.

Use the [DOWN/UP] buttons to change the gain value of that band. The [DOWN] button will lower the gain value, or "cut" the chosen frequency; the [UP] button will raise the gain value, or "boost" the frequency. Pressing both the [DOWN] and [UP] buttons at the same time will reset the gain value of the frequency to 0dB. There is an overall range of +/- 12 dB of gain change available.

Band Solo

The DEQ230 has a handy feature called Band Solo that allows you to “isolate” a given frequency while you are editing. This can help you determine exactly which band you need to highlight or de- emphasize. It’s simple to do:

1.Select a band by pressing and holding its [BAND SELECT] button.

2.Press the [UP] button. You’ll see the LED for that band jump to +12 dB.

3.Press the [DOWN] button. The LED for that band will jump to –12 dB.

4.Release the [BAND SELECT] button and the value of that band will be unchanged.

This only works with one band at a time, but you’ll find it to be a very helpful feature.

To exit Edit mode, press the [LINK/EXIT] button. This will return the DEQ230 to Program mode. The same thing will happen if you de-select the single band you have selected.

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Use Program 00 if you want to start with a “clean slate” and build a new program from the ground up.

If the Numeric LED Display shows “Li” when you press [BAND SELECT] buttons on Channel B, it means the channels are linked. Either make the edits on Channel A, or return to Program mode and press [LINK/EXIT] to unlink the channels.

After resetting a band’s value, you can change the level of that band in 2 dB increments if you hold one of the [DOWN/UP] buttons and press the opposite button repeatedly. This can help you set up a curve with greater accuracy and speed.

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Alesis DEQ230D manual Basic operation Edit mode, Single Band Edit, Band Solo
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DEQ230, DEQ230D specifications

The Alesis DEQ230 and DEQ230D are sophisticated digital equalizers designed for audio professionals seeking precision in sound control. Equipped with advanced features and innovative technologies, these units cater to a variety of applications, from live performances to studio recordings.

Both models include a powerful 31-band graphic equalizer, allowing users to sculpt their sound with incredible accuracy. The DEQ230 and DEQ230D offer extensive frequency coverage from 20 Hz to 20 kHz, ensuring that all audible frequencies are managed effectively. The 1/3-octave resolution facilitates fine adjustments, enabling sound engineers to target specific problem frequencies within the mix.

One of the notable characteristics of the DEQ230 series is its dual-channel operation. The DEQ230 provides individual equalization for two separate channels, making it an excellent choice for stereo setups or multi-channel applications. The DEQ230D takes this functionality even further by incorporating digital connectivity, allowing for seamless integration with digital audio systems and enhancing flexibility in various setups.

In terms of technology, the DEQ230 and DEQ230D utilize state-of-the-art digital signal processing (DSP) to deliver high-quality audio performance while minimizing latency. These models feature comprehensive output level control and provide precise metering through LED indicators, which allows sound engineers to monitor levels easily while adjusting the EQ settings.

Moreover, both equalizers come equipped with a variety of memory presets. This feature enables users to save and recall specific settings, streamlining the workflow during live events or studio sessions. The intuitive interface ensures ease of use, with clearly labeled controls that facilitate quick adjustments on the fly.

Alesis has also prioritized durability in the design of the DEQ230 and DEQ230D. The robust construction and rack-mountable chassis make them ideal for both touring and permanent installations. Additionally, the inclusion of balanced XLR and TRS inputs and outputs guarantees compatibility with professional audio gear while minimizing signal degradation.

Overall, the Alesis DEQ230 and DEQ230D represent valuable tools for any audio professional, offering precision, versatility, and robust performance in a compact design. Their combination of advanced features and user-friendly interface makes them an excellent investment for enhancing sound quality in any audio environment.
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