Alesis DEQ230D User Manual

Applications 

 

During a live performance, you may experience feedback if  a 

microphone is placed too close to a monitor. However, this 

feedback often occurs at one frequency before it happens at 

others. You can "ring out" the monitor by using EQ to cut the 

frequency that’s feeding back. The following is best to try when the 

band and audience are not present: 

 
1.  Insert the EQ between the mixer’s monitor output and the 

monitor amplifier. 

2.  Slowly and carefully raise the monitor level to the point of  

feedback. Notice that it always feeds back at the same 

frequency unless the mic is moved a lot. As soon as you hear 

feedback, turn the monitor level down, but not off.  

3.  Select a band that is near where you think the feedback is 

occurring. For example, if  you’re getting high-frequency 

feedback, try 6.3 kHz. 

4.  Slowly raise the 6.3 kHz Band Gain level while listening for 

feedback. If  you hear feedback, cut that frequency because you 

guessed right.  

5.  If  you don’t hear feedback, return that band to “0” and repeat 

this procedure with another frequency band. Once you hear 

feedback, cut that frequency. 

 

If  you don’t hear feedback at any frequency using this method, try 

boosting the monitor level a little more.  

 

 

A popular vocal effect is to filter the voice to a limited frequency 

range. This “telephone” effect is also called “futzing,” and can be 

used on any instrument or mix. Here’s how to get that sound on 

the DEQ230: 

 
1.  Follow the instructions for items 1 and 2 from Step 2. 
2.  Press all of  the [BAND SELECT] buttons in the ranges 

from 25 Hz to 630 Hz and from 6.3 kHz to 20 kHz on the 

channel you are using.  

3. Use 

the 

[DOWN] BUTTON to reduce all of  these 

frequencies until their LEDs are at -12 dB. 

4.  Select all of  the unedited frequencies and boost them as high 

as you can without clipping the signal. 

5.  Be sure to toggle the [BYPASS] button to compare the result 

with the original.