For a quick good time, blankets...

Try "fight attendants"  (as in boxing, MMA, etc.) for even larger room dampening (and we do mean DAMP) characteristics!

Hey @tomcarr no problem at all.

I don't know about Prima. I found GIK and their prices and effectiveness so reasonable I'm a devoted fanboy. ASC is also very good, but pricey....

GIK also is really super helpful for the novice. Upload pics, diagrams and they'll set you up.

I tried this tweek 25 years ago. Ended up having my 1st child.:)

@acman3 That's the problem with science, danger lurks everywhere.

I think the most overlooked "room treatment " is the area front/between the speakers on the ceiling. Try the blanket treatment, especially if they are standard height, e.g. 8', etc., and near field listening arrangement. Helped my room to sound a tad warmer.