Choice of BD15 for our High-end Hifi project? (BD-Design)

by Jose Hidalgo , Monday, April 30, 2007, 20:26 (6215 days ago) @ madprofessor

Hi everybody, I'm still here. :wink:

I was just wondering how the BD15 can achieve such remarkable results (low distorsion, no breakup problems) with such a light membrane (Mms only 66g !). This means the membrane must have an exceptional stiffness / a very high Young module.

However, the diaphragm material seems to be a well known-one : paper.

So I was wondering, since paper alone probably can't achieve such good results (physics remain physics), is there some kind of secret recipe that Bert is using to increase the BD15 diaphragm stiffness ?

For instance, other manufacturers use different kinds of carbone fibers, with pretty good results (e.g. Davis 40RCA15). The BD15 doesn't. So in your opinion, where's its secret ?

Bert, I'm not asking for your secret recipe of course : I'd just want to know if there is actually one (so the BD15 cone wouldn't be just made of plain paper), or if there is not (and in that case I wouldn't understand how can a light membrane achieve such results without noticeable breakup problems).

Thanks for enlightening us all.

Jose

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