Just for fun

Started by Noumenon on 22 May 2006. 6 replies.

Originally posted at johnlsayers.com, topic 6281.

Since I've found myself rather bored of late I've started drawing some studios for fun. Would anyone tell me if there's something "wrong" with this? All opinions are welcome. I'm here to learn :) Basic question, is it ok to make the soffits/basstraps like I've done here?
External image, not preserved — original: http://shit.threedaysindarkness.com/ControlRoom.png
PS, nevermind the height of the desktop monitors, haven't gotten to that part yet :P
Your soffits should be angled at a 30 degree angle. Yours look more like 45's.
the soffits/speakers are angled at the listening position with the same length on every side. (Mon A - Lis. Mon B - Lis. Mon A - Mon B). but can you do a cut like that in the soffit so the window fits?
Just depends on how big the soffits are or how big the window is. Either are adjustable. I don't think there's a magic size, but the soffits need to be big enough to house the speakers, obviously. If your speakers are at 45's you're narrowing your stereo field by 30 degrees. That's a lot!
I think it might be the angle in the pic that's fooling you.
External image, not preserved — original: http://shit.threedaysindarkness.com/Studio.png
and some old school math. the sum of all the angles in a triangle is always 180°, right? and in a like sided triangle each angle has to be the same as the rest, right? so, 180°/3=60°. Where's the 30°? I'm not following :(
Soffits angled 30 deg. in from a flat wall result in speaker baffles being perpendicular to the two legs of equilateral triangle comprised of two speaker centers and a point about 10" behind your head; and the baffle extension (the face of the soffit) should be as large as you can make it, up to about 45" in each direction from the woofer in a system with a LF cutoff of around 45 hZ - There's a formula based on LF cutoff that ensures full 2 pi response for the woofer if the baffle is at least the size obtained in the formula's solution - http://www.quarter-wave.com/Project01/B ... ection.pdf http://www.quarter-wave.com/General/BSC_Sizing.pdf (don't remember which one of those has it, formula includes WB and a number in the range of 4000+ ) IF you allow your walls to form a concave surface (bending IN from the soffit face) and the soffit face is much smaller than that minimum calculated above, it can cause some "horn-loading" of the sound which (depending on the room shape/size) can cause a narrowing of the "sweet spot". Gotta crash soon (3 am), hope that helps... Steve
Okay. have to read that through more in detail :) One question, why ~10" behind my head?