>>If you over-treat a small room it sounds like a really small room.
I tend to think that you cannot over treat a room. I think with first reflection absorbers you can.
If you treat every 90 degree angle in your room with 703 fiberglass absorbant coated with FRK (I think) material it will only absorb the low frequency and reflect the mid/highs. In my personal opinion (and that of Ethan Winer), every 90 degree angle in your room should be treated with a bass trap. These traps can be coated with the reflective surface so that only low end gets absorbed.
Further treatments such as first reflection pannels should be placed on the roof and on the side walls. This will give you the absolute best listening room possible.
Randy pointed out to me these videos that Ethan Winer made concering bass trapping and RFZ. In his theatre room he has something like 30 pannels (including bass traps).
I have realized that Ethan is an expert in the field of sound in the studio AND listening rooms/home theatres).
Here is a link to his videos.
-Hutz
