Interesting, could you elaborate a bit more on the math, not sure what how too read it.Tonmeister said:'room modes' - resonance frequencies that are most problematic at low frequencies. They have wavelengths which correspond to your room dimensions. E.g. your room is 4.3 metres wide; this will give you resonances at (340/8.6) Hz = 39Hz, (340/4.3) Hz = 78Hz, 117Hz etc. You need some serious carpentry skills and knowledge of resonaces to build some 'bass traps' that will absorb sound at your problem resonance frequencies to level out the bass response of your room, but with these speakers, it would definitely be a fun and worthwhile project.
Thanks, looks like i have some issues in the 20-70 hz region though the walls are irregular and not flat so this could change thing's some what.Tonmeister said:The wikipedia article on room modes seems fairly accurate from a brief glance, and should get you started,
Here's a room mode calculator: http://www.bobgolds.com/Mode/RoomModes.htm
And here's a website of a guy who takes acoustics very seriously: http://www.ethanwiner.com/acoustics.html
Basically, standing waves set up between parallel surfaces in your room at frequencies whose wavelengths are: twice the dimension in question, equal to the dimension, 2/3 the dimension, 1/2 the dimension, etc, giving a harmonic series of resonances. More complex modes are set up by sound bouncing obliquely around the room in 2 and 3 dimensions, making the calculations pretty complex.
You only need to worry about room modes in small (ish) rooms and at low frequencies,
If your system is halfway decent, then sorting out room acoustics is the best way to fix muddy bass and imaging problems.
I hope this helps!