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Message: <blockquote data-quote="KenMasters" data-source="post: 1172349" data-attributes="member: 517">You should try to take a measurement first, keep the mic in the same position while you make the changes, then measure again. Small changes in mic position can have quite an impact on the measured response, you could have made a difference, or the mic could just be positioned higher than the last time - better to try keep comparisons like for like to be sure.Also don't fall in love with Psychoacoustic, it's good for keeping perspective but it's more useful to analyse a higher resolution trace. Also keep an eye on RT, bearing in mind you want to not only bring it down, but do so in an even fashion.EDIT: Pardon my skepticism, but it's because if SBIR is causing the problem you're seeing in the bass region, from this comparison the treatments don't seem to have much effect, and I wouldn't expect them to cause an uplift at 600Hz. So either they aren't thick/effective enough and/or your speakers are spaced too far from the front wall to be in their effective range, or the primary issue is your MLP is in a room induced null (for which bass traps can help).</blockquote>