I had read that the RS meter was good to around 2000Hz so that agrees with what Jay wrote.

That dip at 70Hz is common in our rooms and often relates to a room height mode. Corner bass traps may help and you can also try traps above the listening position (didn't make any difference for me though).

Both corner traps and thinner (2") traps at first reflection points should help with the dip at 300Hz. Changing speaker position can also help here.

Fred

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