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Author Topic: Fostex FE166En phase plug mod - bullshit or no bullshit.  (Read 4296 times)

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OJneg

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Re: Fostex FE166En phase plug mod - bullshit or no bullshit.
« Reply #10 on: August 13, 2013, 09:55:16 PM »

The next step is to design a phase plug to tone down the rising response on-axis and maybe even further flatten out the response off-axis.

I don't suppose it would be as simple as having a heavier phase plug. Mass-loading to create a HF roll-off?

This also makes me wonder about the whole modding thing that planet_10 does to the Fostex drivers.

http://www.planet10-hifi.com/fostex.html
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Marvey

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Re: Fostex FE166En phase plug mod - bullshit or no bullshit.
« Reply #11 on: August 14, 2013, 02:23:24 AM »

Once the dust cap is removed, the phase plug isn't part of the cone anymore. The phase plug actually attaches to the pole piece. It's not part of the moving mass.

As for the EnABL stuff, it probably works. It's no different from mass loading specific parts of the cone with itty-bitty little bits of bubblegum.
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OJneg

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Re: Fostex FE166En phase plug mod - bullshit or no bullshit.
« Reply #12 on: August 14, 2013, 05:59:55 AM »

My main effort would be trying to bring down the response at 7k. If I could simulate the potential differences in response, I might be willing to try a bit of that foolery with my own drivers.
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AstralStorm

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Re: Fostex FE166En phase plug mod - bullshit or no bullshit.
« Reply #13 on: August 20, 2013, 09:09:29 AM »

You'd need a better speaker for that (this one is already pretty good though) or equalization. No real way to not drop detail extraction while cutting those frequencies otherwise.
If you are willing to sacrifice detailing, some front thin foam filter would do.

Is this for a 3-way design?
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