Alesis DEQ230D manual Band Gain Cut/Boost Ranges, Led

Page 35

Basics of Equalization 3

Band Gain Cut/Boost Ranges

Whether you are cutting or boosting a band, the first 10 dB of change happens in 0.5 dB increments. The last 2 dB of change, going from +/-10 dB to +/-12 dB, happens in increments of 1.0 dB. So as you make the change, the Numeric LED Display will show you values like this: 0.5, 1.0, 1.5, 2.0, 2.5 ... 9.0, 9.5, 10, 11, 12.

It’s not possible to show a minus sign in the LED display for negative gain values. So when you're pushing the [DOWN] button, you'll see the same values: 0.5, 1.0, 1.5, 2.0, 2.5 ... 9.0, 9.5, 10, 11, 12. But if there's any doubt in your mind about which away you're going, the Band Gain LED will clue you in. As soon as you move 0.5 dB away from 0, the LED for that band will change from green to yellow. If you are cutting the frequency, the -2 dB LED will light. If you are boosting the frequency, the +2 dB LED will light. And on it goes until you reach the maximum value in either direction.

The resolution of the gain increments is higher than the number of gain LEDs in each band on the front panel can fully display. Therefore, you may make 0.5dB changes to gain and a band's Gain LED may not change. The following table shows the amount of change in dB it takes to light each of the Band Gain LEDs:

LED

Gain change

 

 

+ 12 dB

+ 12 dB

 

 

+ 10 dB

9.5 – 11 dB

 

 

+ 8 dB

7.5 - 9.0 dB

 

 

+ 6 dB

5.5 - 7.0 dB

 

 

+ 4 dB

3.5 - 5.0 dB

 

 

+ 2 dB

0.5 - 3.0 dB

 

 

 

 

0 dB

0 dB

 

 

 

-

2 dB

0.5 - 3.0 dB

 

 

 

-

4 dB

3.5 - 5.0 dB

 

 

 

-

6 dB

5.5 - 7.0 dB

 

 

 

-

8 dB

7.5 - 9.0 dB

 

 

- 10 dB

9.5 - 11 dB

 

 

- 12 dB

- 12 dB

 

 

 

Remember, if you want to keep the edited program, be sure to store it to one of the User locations. For instructions on how to do this, turn to page 38.

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Contents Reference Manual This page intentionally left blank Table Of Contents Chapter Four Applications Welcome IntroductionDEQ230D only DEQ230 Key FeaturesBypass button How to Use This Manual This page intentionally left blank Please follow these precautions when using this product Important Safety InstructionsImportant Safety Instructions English Safety symbols used in this productPage Instructions de Sécurité Importantes French Symboles utilisés dans ce produitPage Lesen Sie bitte die folgende Sicherheitshinweise German Sicherheit Symbole verwendet in diesem ProduktPage FCC Compliance Statement CE Declaration Of ConformityThis page intentionally left blank Hook it up to a mixer Quick Start GuideIf you cant wait to get started Store the Program Play some signal into the unitTry some equalization Quick Start Guide Quick Start Guide Thermal Considerations in Rack Mounting Installing in a RackConnections Unpacking and InspectionTo use the DEQ230 in another country AC Power HookupUnbalanced I/O Connecting Inputs and OutputsStereo connections Balanced I/OOperating Levels Mono connectionsConnecting to equipment with XLR inputs and outputs Connecting to the inserts on an instrument amplifierDigital Signal In, Digital Signal Out Analog Signal In, Digital Signal OutDigital Signal In, Analog Signal Out About Audio Cables This page intentionally left blank Basics of Equalization What is equalization?Description of the Controls Basics of EqualizationDescription of the Basic Modes Program modeEdit mode Store modeChannel Level mode Bypass modeAudition mode Basic operation Program mode Band Solo Basic operation Edit modeSingle Band Edit LED Band Gain Cut/Boost RangesProportional Gain Memory Multiple Band EditSelecting an Edit Group Relative Gain DisplayBasics of Equalization Limits of Relative Gain Release Edit Group function Basic operation Store mode Channel Copy Basic operation Audition mode Audition Automation override Audition AutomationManual Audition Basic operation Channel Level mode Metering modes Demonstration modeReal-time Analysis mode DEQ230D only Hidden ModesItem button Function Displayed Options Default Value Setup modeButton 2 Release Edit Group On/Off Button 1 Master Level +/- 6 dBButton 5 Lock On/Off Button 3 Audition Automation On/OffButton 4 Edit Time Out On/Off Button 8 System Exclusive Transmit Send? Buttons 6-12 DEQ230D onlyButton 6 Midi Channel ALL Button 7 Midi Program Change On/OffButton 12 Force Analog Input Auto/Analog Button 9 System Exclusive Receive WaitingButton 10 Midi Out/Thru Select Out/Thru Button 11 Sample Rate Select 44.1/48Hold Press Result Button combinationsPhasing Equalization ArtifactsDistortion NoiseWhat makes the DEQ230 unique? Constant Q vs. Variable QConstant Q Variable QMulti-band application and results Basics of Equalization Tape Hiss Removal ApplicationsRock Kick Drum Vocal AirAnswering machine Filtering effectsEliminating Feedback Comb filtering This page intentionally left blank Title Description Program ChartsProgram Charts Some signals have 60Hz hum no matter what you do. This Untouched corner frequency is approximately 75Hz See note for program From magnetic media Place at the high end of the mix 11kHz for effect, bandlimiting it to half the sample rate Listeners attention Blank Store one of your programs here DEQ230 Settings Chart This page intentionally left blank Line Conditioners and Protectors TroubleshootingCare and Maintenance CleaningTroubleshooting Index TroubleshootingCustomers outside the USA and Canada Obtaining Repair ServiceRefer All Servicing to Alesis Customers in the USA and CanadaThis page intentionally left blank Mechanical SpecificationsDEQ230 Audio PerformanceThis page intentionally left blank Alesis Limited Warranty Warranty / ContactAlesis Contact Information

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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