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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: Room modes sparse under 50Hz.? posted by Richard BassNut Greene on February 6, 2007 at 09:39:48:
RBNG - That's why they are so audible -- not dense enough!
Probably three room modes under 50Hz. in a typical room.Once again, when you combine a dipole with a monopole xo'd @ 50hz, you have cardioid radiation @ 50hz. So yes, a monopole will have very few modes to excite in the below 40hz range. A cardioid will excite different modes than the dipole or monopole, but will maintain DI and still radiate -4.8db less power. An equalized monopole below 35hz is superior in every way a dipoles hopeless ineffeciency below these frequencies. I have linked a 2 part article for you below. Give it a read.
RBNG - You control harmonic distortion by using mutiple high-XMAX drivers for a dipole. Not cheap. Not small. But subjectivelky better bass quality than monopole speakers in most rooms. Especially smaller rooms.
Yes, I've known that for many years first hand. I practice what I preach :-).
RBNG - There is no room gain from a pressure source unless the room is unusually sell sealed (like a car with windows closed) which is very rare. You may ask Earl Geddes for details from his experiments.
.I was there when Earl caused a near riot over on the Mad board (when it was functional) with his own use of the term. Won't rehash that again.
cheers,
AJ
I contend that we are both atheists; I just believe in one fewer god than you. When you understand why you reject all other gods, you will understand why I reject yours
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Follow Ups
- Re: Room modes sparse under 50Hz.? - AJinFLA 15:44:23 02/06/07 (1)
- Let's consider a typical 20 x 15 x 8 room -- maybe you may be somewhat partially right about monopoles below 50Hz.! - Richard BassNut Greene 09:41:08 02/07/07 (0)
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