This may sound dumb but the sound was improved in my system when I went from a sofa to a leather Lazy Boy. The Lazy Boy is the biggest they have and has a back that is 8" above my ears and is 38" wide. I had a very bright node 6" behind my head with the sofa, but with the Lazy Boy I can recline into that node area and it sounds smooth and natural. I figure it's all the over stuffing at each side of my ear and the fact that back reflections are absorbed and defused by the back side of the chair.
Also I have a number of wool rugs on a wood floor. Rug on rug, this is a very atractive way to deaden the bright floor. Wool curtains, full length even if the window is shorter. Wool curtains over a wall with Corning fiber board behind it, much like a movie theater (I have not done this in my house, but for a basement situation it would work good. I have installed this in a couple home theaters I've designed and it looks great, it's a great way to add color and texture to a room)
J.D.
Also I have a number of wool rugs on a wood floor. Rug on rug, this is a very atractive way to deaden the bright floor. Wool curtains, full length even if the window is shorter. Wool curtains over a wall with Corning fiber board behind it, much like a movie theater (I have not done this in my house, but for a basement situation it would work good. I have installed this in a couple home theaters I've designed and it looks great, it's a great way to add color and texture to a room)
J.D.