Room treatments

So my daughter and her husband are moving and I noticed a brand new temperpedic mattress they had in guest room they were getting rid of. I don not like to collect anything. Room treatment has been mentioned a ton of times before and that the room is close to the most important component of a sound system. Makes sense to me. Well I don't know why, but I thought i would take it home and put it behind my listening position. I did that a week ago. 
It made a big difference in the sound. It is way more open sounding. More dynamic. It has a fuller harmonic structure.  It is more real sounding. It is more expressive. I think it is a big improvement. But it has only been a week. 
Just wanted to share. 

@williewonka thanks! I may try that...

@asvjerry I'm in a 117 year old craftsman and I know I can improve a bit

Someone mentioned the foam factory and I think some of their things may work for me.

what a great discussion his formed into!

thanks everyone for all the input!

Randy-11

ASC was at the show so I would assume they helped treat them, but I do not know for sure.

Also, to the OP, contact GIK for advice. Super nice people, great range of affordable products.

The GIK Tri-Trap corner bass traps are very interesting and should be more effective than the customary free standing bass trap panels (should actually trap the undesirable bass frequency backwave).

Dave