3 Basics of Equalization

Basic operation: Channel Level mode

Channel Level mode allows you to adjust the output level of channels A and B independently or simultaneously. Use this feature to compensate for a reduction or increase of signal level due to the equalization curve you have selected.

To enter this mode you must start from Program mode. Once you are there, you can enter Channel Level mode in one of two ways:

•On Channel A, press and hold the 16 kHz button and then press the 20 kHz button, or vice versa

•On Channel B, press and hold the 25 Hz button and then press the 31.5 Hz button, or vice versa. (This option only works when the channels are not linked.)

Note: If you press only one Band Gain button, you won't enter Channel Level mode--you may have entered Band Edit mode by mistake.

Once the DEQ230 is in Channel Level mode, you will see the Band Gain LEDs go completely dark except for the ones over the buttons mentioned in the two steps above.

From this point onward, Channel Level mode operates exactly like Band Edit mode: the settings for Release Edit Group and Edit Time Out are in effect; if you select both channels A and B for editing, you have selected an Edit Group; the Relative Gain Display and Proportional Gain Memory will govern the gain adjustments made to the Edit Group.

The only real difference between the way this mode and Edit mode operate is in the amount of boost that is allowed to occur in Channel Level mode. The DEQ230 will allow each channel to be boosted up to +6 dB, with an allowable cut range of -12 dB. If you want another 6 dB of gain (for a total of 12 dB), you will find that in the Master Level function in Setup mode. But remember, the settings for Channel Level mode are stored with each program. The settings for the Master Level function are not.

To exit Channel Level mode and return to Program mode, deselect both channels or press the [LINK/EXIT] button.

Once you are in Channel Level mode, you must press both of the appropriate Band Gain buttons on one or the other side of the Numeric LED Display in order to select or deselect one of the channels. If you press only one Band Gain button, the channel selection will not change.

For information on selecting an Edit Group, see page 34. For information on the Release Edit Group function, see page 45. For information on the Edit Time Out feature, see page 46. For information on the Relative Gain Display, see page 34. For information on Proportional Gain Memory, see page 34.

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.

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Alesis DEQ230D manual Basic operation Channel Level mode
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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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