The above are some REW measurements of my room taken recently. I had some troublesome rattlings and one suckout centred around 25 Hz which kept me busy for a while. Tweaking my third sub's xover took out the dip, and the rattle was found the hard way - I had to disassemble my steel stand ( lotsa PT!) only to discover that it did not originate there. I have special Boston carbon/graphite feet under my subwoofers and one of them was not straight and rattled in sync with the Subs. Acoustic underlay ( used under my 12mm laminates), sorted it.
Finally got my stands back ( one expensive exercise which I do not want to repeat quickly again) and now have to painfully assemble it again. Thanks Rodney for the 50+ cork washers and all the help, appreciated!
I am finally enjoying my music!
Comments, pointers on improvements that can still be made will be appreciated.