µ-Dimension Glow DSP8 Instruction Manual - Page 40

Page 40

caused by a cancellation in the response.  This can be due to multiple 

speakers playing the same frequency but having them out of phase at 

the microphone location.  It could be caused by a reflection off a hard 

surface, where the direct sound arrival from the speaker and the 

reflected sound off the hard surface arriving slightly later combine to 

cancel the response at that frequency.  

Regardless, if the frequency response shown on the RTA display 

does not move in direct correlation with the changes being made on 

the EQ controls, you will not be able to correct the problem with EQ.  

You will need to use speaker polarity, crossover frequency/slope, 

signal delay, etc. to correct the problem.  If you determine it is due to 

a reflection off a hard surface, physical adjustments to the speaker 

placement, moving or modifying the hard surface, etc, may be 

required.  

In the end, you may choose not to address some frequency response 

issues.  As always, use your ears to confirm what actually sounds the 

best.  Just because an RTA gives you a particular visual frequency 

response on the display does not