Reply To: Ringing Out The Room – Channel or Overall PEQ?

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Dick Rees


I’m not going to get into an endless refutation of your misconceptions regarding audio. Those of us who do this for a living certainly see through your misinformation. I did a point by point reply to clarify the misleading conceptions in your first reply not to cavil with you but to point out for the benefit of the OP and other beginners the fallacies inherent in what you wrote.

Either your wording was errant or you operate with only a partial knowledge of the basics physics of audio. Your characterizations of GEQ /PEQ are demonstrably fallacious and misleading to those trying to learn. Additionally, your statements about the causes and characteristics of feedback fall way short of the mark.

I’m not going to continue this as a debate. I come here to help those who are starting out, not to disabuse folks who insist on clinging to what I’ve heard called ” faith-based physics.”

To the OP and anyone else interested: GEQ, though often used for the task, is not the best tool for dealing with standing waves and/or room resonances resulting from room/system interactions. PEQ is the better tool and should be applied to the mains bus, not the individual channels.

The bulk of problems in this area lie below 300hz and 3 or 4 notch filters commonly suffice. GCumbee spoke of this in his post above. If you happen to have a DSP unit or DSP built into your power amps or powered speakers, you should take the time and trouble to optimize your system in free space (outdoors) so you’re not dealing with both system AND room anomalies at the same time. It gets tricky fast.