WOW, after I read what @joshfilm posted I went to the Stillpoints site, not believing that this patent drivel and misinformation was up for all to see. I no longer have any interest in their products. This insult is the worst kind of advertising.
I was appalled to read this :
❝When using conventional acoustic panels made of typical absorbing
materials, there will be only one volume level at which the absorbing
material will control the acoustic energy within the room adequately.
(This is a static system.) At volumes above that level, you would need
more absorption. At volumes below that level you will have too much
absorption and the room will sound lifeless, dark, and dull. The
Stillpoints Aperture utilizes a blend of absorption materials, and a
unique design of internal chambers to trap acoustic energy.❞
The amount sound is affected by an absorber is directly due to its coefficient of absorption and the amount/ thickness of material used. The absorption is NOT dependent on how loud you listen!
I recommend you educate yourself on room treatment. There is much on the net, some good and some not so good. Ethan Winer has some you-tube videos worth watching. @millercarbon states that absorber panels are 'old school' and do very little and that carpet will do the same. This is not correct. The acoustic phenomenon does not care about old school and measurement will bear this out.
Consider buying a measurement mic. like Behringer for about $80 and using either Holm Impulse or REW. Both are free downloads. I use Omnimic which is on sale from Parts Express for $250. All these will allow you to measure what your room is doing and by looking at the csd plots you will be able to see which are the most troublesome frequencies.
The average listening room requires a T60 of about 400ms. This is the time it takes for the sound to decay by 60dB. This takes all the guesswork out of the equation. If not interested in measuring, though I find it so informative and a lot of fun, then by mounting bass traps in the corners, broadband absorbers (the ones millercarbon scoffs at) and diffusers if you have the space, you will be well on your way to being sorted.
Just these will make a huge difference to your sound and I mean HUGE, more than a component upgrade. You will no longer have the sound taking too long to die away confusing and smearing everything. It is difficult to conceptualise the way in which strong early reflections ruin the sound.
I again urge you to learn about this so you are not misled and can make informed decisions. For example many companies advertise bass traps but just looking at these things it can be seen that they are far too small to be effective. If you can DIY look up superchunk bass traps. Not difficult to build but they are large and this is what is needed to for them to work down to low frequencies.
A basic formula needed in this game is wavelength (lambda) = V/f
V= velocity of sound 343m/sec f=frequency
I mention this to show you why it is folly to expect carpet to do anything useful, in fact wall to wall carpet is deleterious. Take a carpet 1/2" thick, from above formula, frequency=V/lambda= approx 2700hz. This is the freq. that will be absorbed. Because carpet is thin this will present a narrow band of absorption and because there is carpet everywhere that freq. will be missing in action. It is gone, absorbed and no EQ can bring it back. This also explains why bass traps are LARGE.
Dear OP I wish you luck and feel free to PM me if you like.