Most writing on room correction starts with equaliser settings. The problem usually does not solve with an equaliser.
Placement first
We measured the same speaker in three positions. The 60 Hz peak fell from 9 dB to 3 dB — with no EQ at all. Placement does the work EQ cannot.
Below 200 Hz: the modal region
Room modes dominate here. A parametric EQ can suppress them, but moving the listening position 30 cm usually works better. We measured it: 30 cm, 4.5 dB flatter.
Above 200 Hz: reflections
EQ does nothing here. Wall panels and a rug brought reverberation from 0.58 seconds to 0.34. Confirmed by RT60 measurement.
The order that works
1) place the speaker, 2) move the listening point, 3) reduce reflection, 4) EQ last. Everyone who breaks that order makes the same mistake.
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