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fivestring 6th September 2008 10:18 AM

Planar magnetics & ribbons

Here is a pair of loudspeakers I have made with the excellent Hygeia drivers. Their staff was very supportive and welcoming with my particular needs. I wanted a ribbon tweeter with a flat foil and an open back midrange magnetostat (their original one was closed on the back).


My site:

poldus 6th September 2008 04:06 PM

Amazing job! Could you comment on the differences between those planar mids and the neo8?

fivestring 6th September 2008 04:17 PM

I would say Hygeia RM-8402 is much better IMHO, but please notice my version was different than the stock unit, which is closed at the back (mine was open - dipole). However, I feel they are best used in an dipole fashion, like on the prototype loudspeaker below:

Hygeia RM 8402

Baldin 6th September 2008 05:54 PM

I don't see any prices on Hygeia's pages.
How much did you pay for the mids and the tweeters?

Looks like realy nice speakers. Good job ;)

fivestring 6th September 2008 05:59 PM

Don`t hesitate to inquiry them, the prices are good.



Charcoal 11th September 2008 05:51 AM


What is the exact model of midrange planar in your speaker?

fivestring 11th September 2008 06:18 AM


Originally posted by Charcoal

What is the exact model of midrange planar in your speaker?

It is Hygeia RM 8402, but it is not a stock unit, as I have requested an open back.
The stock unit is


Charcoal 11th September 2008 06:26 AM

What speaker sounds better: from your fisrt picture or second?

What is the low frequency cut off for planars?

Could you give moredetails about this project?

Charcoal 11th September 2008 11:16 AM

Just received responce that they sell only to speaker producers.

Atom666 12th September 2008 04:36 PM

The RM-8401 looks like a clone of the Monsoon driver. Some of the others look like the BG Neo8 and other BG drivers Maybe this is where they have them made?

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