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turk 182 26th October 2012 07:52 PM

multiple driver speaker
after acquiring a pair of Bifrons hox 05 speakers i'm interested in trying to determine if these boxes are indeed original or at some time in their history they've been re/hacked.
the pair are identical in construction but are two different finishes.also one of boxes had a driver missing.after examining these a little more closely they appear to be an assembly of 9 4 inch full range drivers in a quasi bose scheme 8 drivers on wrinkled baffle and one driver on the back i'm trying to confirm that the box wiring is original it appears that both are wired in a series parallel scheme 8+8+8=24 24/3=8 final but follow a pattern determined by string (series) and position in the box also after a little
research it seems these where originally designed for PA use which leaves me wondering if they originally came with x-formers.

Pano 26th October 2012 07:55 PM

:cop: I think you tried to paste the image into your post, instead of the image URL. Can you point me to it so I can fix it?

turk 182 26th October 2012 08:01 PM

sorry not sure what i did i didn't have any pic's ... oops.

turk 182 30th October 2012 03:27 PM

is anybody out there?!!


planet10 30th October 2012 06:32 PM

We really need a picture to be able to evaluate. Daniel next door has a pair and has purposely removed one of the isophon edrivers (the 9th one on the back).


turk 182 31st October 2012 12:15 AM

multiple driver speaker
1 Attachment(s)
ok planet 10
here's the speaker porn you requested
so ante up what kind of info/tech documents do you have on these

turk 182 31st October 2012 12:17 AM

why did your neighbor remove a driver?

James Lehman 31st October 2012 12:39 AM

IIRC the Bose system that had nine drivers in it was wired with all in series and each speaker was 0.9 ohms.

0.9 x 9 = 8.1 ohms. Weird.

Check the DC resistance of all of the ones that are still wired and then isolate one driver and measure that.

A DC resistance will be lower than the nominal impedance, but not by a whole lot.

James. :)

turk 182 31st October 2012 12:44 AM

they are indeed all 8 ohm drivers model HX125-8 made by Electroakusztikal Gyar (now b.e.a.g.)

planet10 31st October 2012 01:30 AM

1 Attachment(s)
hmm... the one's i've seen all had isophon drivers.


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