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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

Does anyone have Thiele/Smal parameters for the Penta midranges?

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GTS
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Northern California
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GTS Posted: Tue, Sep 4 2012 4:17 AM

Does anyone have Thiele/Small parameters for the Penta midranges?

I'm investigating putting together a recone kit for these for a small project.

Dillen
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Dillen replied on Tue, Sep 4 2012 6:48 AM

The drivers are most likely produced to B&Os specs and I don't think, the T/S parameters are publicly available.
There are ways to measure them, though, but a bit expensive and quite elaborate.

Martin

Jeff
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Jeff replied on Wed, Sep 5 2012 1:09 AM

The easiest way to do TS measurement is with this:

http://www.parts-express.com/pe/showdetl.cfm?partnumber=390-806

Costs a bit under 100 dollars US, and I can measure a driver in about 5 min. As opposed to the hours it used to take me with a signal generator, DVM, etc. 

PI can highly recommend it, works great for doing impedance plots for a whole spkr from 20-20,000 hz. 

Jeff

I'm afraid I'm recovering from the BeoVirus. Sad

GTS
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Northern California
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GTS replied on Mon, Sep 10 2012 4:03 PM

Jeff, what an awesome bit of kit. Failing a few leads I'm going to give this a try. Many thanks.

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