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Originally Posted by xmostynx  i'm having a BITCH of a time getting these monitors placed right....
if i run a 60hz tone in my room, i can walk around and feel null spots- and then peaks..
for example- they wall i look at behind my monitors HUGE peak- it freakin' rings so hard it shakes the window- |
I'm guessing this is a "I canna change the laws of physics captain". If your head is a fixed fraction of a wavelength from the wall (quarter I think, for a half wavelength round trip) and there's not much absorption then the reflected wave will cancel the incoming there. If you're half a wavelength away the reflected and incoming will add constructively.
I don't know what's done practically to avoid this... beyond having weak reflections (absorbing barriers - broadband absorbers - in front of the walls). I'm having a go with rockwool bass traps / speaker placement at the moment. I did find that adding blocks of rockwool actually increased bass sometimes at the measurement point - as I think it talks about on Ethan's site - presumably by weakening the destructive interference. The room feels a bit dead now though, but music sounds clear.