I'm surprised how little interest there is here on room tuning. I can't tell you how to cure your room problems, but, one thing I have learned after fooling around with HiFi since 1970 is this:It is very easy to over damp a room. The sound will loose a certain life like sparkle that is not a brightness per say, but, the natural sound of real instruments. Untill I discovered the Room Tunes products I was always struggling with the compromises of traditional methods like hanging rugs, or, acoustic foam, etc. The corner tuning pillows make a huge difference without soaking up all the natural timbre. It is easy to over do it with the standing "delux" room tune panels. I only use two in my room. Anyone using Room Tunes please try this simple tweak: Cut a piece of heavy duty Reynolds Wrap one inch smaller than the pillows and slightly crumple it up to give it a slightly uneven texture. Dont squeeze it into a ball, just crumple slightly. Now affix it to the pillows with one piece of double stick tape in each corner. Just for fun, lets refer to this as the Harvey mod. I have "wasted" most of my adult life working on this stuff and all I ask is a little recognition. Try this and let me know what happens, you will be surprised. I have a host of other tweaks to offer. Try this first. Also, don't use anything but Heavy Duty foil.
room acoustics
I'm tearing out the panelled walls in my listening room and have the opportunity to design some acoustic treatment into the room as I refinish it. My reason for posting is to seek advice from those who have travelled this path before. The only plan I have so far is to make the amplifier/speaker wall absorptive (via several inches of insulation). I'm most concerned about the effects of the sliding-glass door and the off-center fireplace. A description of the room follows. The room is 12 by 19 feet. (speakers are on the short wall.) The leftmost 3/4 of the opposite wall is a brick fireplace. (the other quarter is the entrance to the kitchen ... no door) The left wall also contains a sliding glass door. The right wall is uninterrupted until you reach the rear of the room, where there is another passageway ... 90-degrees to the aforementioned Speakers are full-range, and the listening position will be out in the middle of the room. Any help is appreciated. David