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Open Baffle Convert

I recently took my 12" audio nirvana full range drivers out of their cabinets and into open baffles with wings. I can't believe the diference in sound. So much more 3 dimensional and lifelike. I was concerned the bass would roll off but I dont find it a aproblem at all. Munting them 14 inches to center of driver off of the floor seems to be enough. I am curious how many of you have heard this design. All of the downsides I had read about never materialized. Any thoughts?
veroman
veroman's avatar
veroman OP
299 posts
 
I have them about 32" from rear wall. I have used both a small tube amp 3.5 watts per, and a t amp of 15 watts. The drivers are 97db so power is never an issue. I would think putting them too far from the wall would make them less effective. the front baffle is 24" wide
cjaronica
113 posts
 
Open baffle speakers load the room differently than a enclosed box. Bass increases rather than decreases as the speaker is moved away from the front wall.
johnnyb53
3,510 posts
 
11-19-15: Cjaronica
Open baffle speakers load the room differently than a enclosed box. Bass increases rather than decreases as the speaker is moved away from the front wall.
Yep. Just ask any Magnepan owner. With an open baffle design, the back wave is out of phase with the front, so the closer to the wall behind, the stronger the out-of-phase wave, which cancels much of the bass extension firing to the front.
bdp24's avatar
bdp24
10,097 posts
 
If I'm correctly informed, the closer a dipole is to the wall behind it, the higher in frequency does the out-of-phase cancellation begin.
veroman's avatar
veroman OP
299 posts
 
I did not realize this about distance and bass cancelation. will experiment. Thanks Although I must say the bass seems fine as is.
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