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Old 22nd October 2012, 09:34 PM   #21
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Originally Posted by Nelson Pass View Post
I think you could get away with it at low levels. I will be using a regulated
supply, however.

At low levels and possibly [or preferably] with an increase in SPL; if the science allows it.
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Old 22nd October 2012, 11:06 PM   #22
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Originally Posted by Zen Mod View Post
intention of revived (not just nowadays) using of FC in speaker construction is impeccable constant magnetic flux , not influenced with constant variable EMF made by vibrating voice coil

sort of idea that FC is having much lesser "intrinsic impedance " than any permanent magnet

even if you embrace idea of using FC as (even just partial ) choke load for amp , connected to counteract non-linear distortion in rest of speaker/amp combo , I resume that having any success demands sooooooooo complicated and loooong process

not fun

Hopefully experiments to do by speakert makers and other enthusiasts. Who ever thought Lowther will use the old technology field coils in today's prevalent of strong and small magnets?
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Old 22nd October 2012, 11:11 PM   #23
Zen Mod is offline Zen Mod  Serbia
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Lowther is not making them ; they're sourcing their magnet-less drivers to wakoo boyz in US of A

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Old 23rd October 2012, 05:14 AM   #24
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Quote:
Originally Posted by Zen Mod View Post
sort of idea that FC is having much lesser "intrinsic impedance " than any permanent magnet
The appropriate phrase is "AC permeability", for which a saturated field
coil has a low value.

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Old 23rd October 2012, 05:32 AM   #25
Vix is offline Vix  Yugoslavia
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As an Open Baffle fan, I am glad to hear that Nelson is bringing Open Baffles again. That tells us something...
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Old 23rd October 2012, 01:52 PM   #26
Vix is offline Vix  Yugoslavia
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What's going to be on the bottom? Eminence beta 15 or something else? SLOB with multiple 8" bass drivers? Or, may there be another trick up Papa's sleeve...?
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Old 23rd October 2012, 02:05 PM   #27
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Nelson, if I may ask - is the FC a step above and beyond the PM5A's? I would guess so , but I am wondering about your experience. Wicked pricey.
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Old 23rd October 2012, 02:58 PM   #28
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Nelson, if I may ask - is the FC a step above and beyond the PM5A's? I would guess so , but I am wondering about your experience. Wicked pricey.
Tea-Bag: Please clarify what you mean by PM5A.
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Old 23rd October 2012, 03:06 PM   #29
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PM5A is a type of Lowther.
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Old 23rd October 2012, 03:52 PM   #30
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PM5A is a type of Lowther.
Thanks Tea-Bag. Found info in a 6moons review of the Lowther driver. Of interest is the underlined from the same review.

"The latest rage on the net is all about the superiority of full-range field-coil drivers on open baffles. I ordered myself a pair of easily accessible Supravox 215-2000 EXC eight-inchers. I wanted to compare these field-coil drivers to the fixed magnet Lowther on the same baffles."
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