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Old 27th October 2005, 08:27 AM   #11
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Quote:
Originally posted by ScottG
The measurements will not of course take into consideration the modification needed for dipole operation - which should extend the response considerably.
Quote:
Originally posted by tade
how about buy twice as many as needed, and use two of the drilled magnets per speaker. [/B]
Already did that. Fairly easy to do. They did not measure any differently.

I have recently aquired some microMonitors from Akai that use this tweeter (and a PR on the back)

dave
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Old 27th October 2005, 07:29 PM   #12
ScottG is offline ScottG  United States
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Quote:
Originally posted by planet10



Already did that. Fairly easy to do. They did not measure any differently.

I have recently aquired some microMonitors from Akai that use this tweeter (and a PR on the back)

dave
That is very strange.. considering that the rear air-space originally is almost non-existant. It may be that the sd vs. excursion is so minute that no matter what you do you'll not achieve an extended freq. response.
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Old 27th October 2005, 07:42 PM   #13
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That is very strange.. considering that the rear air-space originally is almost non-existant.
I was surprised too... but i trust the guy wih LEAP that did the measures.

dave
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Old 27th October 2005, 08:16 PM   #14
GM is offline GM  United States
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Greets!

Ribbons are like compression drivers in that they have a very high Fs for their potential BW, thus the rear chamber can be quite small for the effective diaphragm area and still be ~an IB acoustically speaking, making them ideal for BLH loading.

So what's Fs?

GM
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Old 27th October 2005, 08:38 PM   #15
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So what's Fs?
Kinda hard to tell...

Click the image to open in full size.

I'll dig out the ones i have and do my own measures and see how they compare

dave
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Old 25th November 2005, 07:56 PM   #16
ScottG is offline ScottG  United States
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Part Deux..

Looking over the BG Neo8 thread here I noticed member fcserei's contribution - in particular that his straight (though front loaded) horn in fact sounded better than the dipole version he worked with. (Also note the freq. response that was elevated from the horn which happens to "gell" rather well with the on-axis response of the driver.)

Bohlender&Graebener Neo 8 Magnetostat

I'm thinking that just two drivers per side would work rather well with a back-horn, perhaps with an Aurum Cantus G2si to fill in the highest freq.s. (i.e. vertically top to bottom:Neo8,Neo8,G2si 1st order cap with the driver inverted to adjust for polar tilt.)

Well, just something more to think about here..
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