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Wanted pair of Fostex FE207e

Thanks Dave. I'll see if I can find the thread, that could be the best option. The 207's I have were attacked by a kid lol. They still sound fine but the centre cone has been grabbed and scrunched!!
I am going to be giving the cabs a respray so I figured I would try and replace the drivers at the same time.
Donald
 
but the centre cone has been grabbed and scrunched

You need phase plugs not new drivers. But even new drivers should lose their dustcaps and get these.

58.jpg


I have stock here, i might have a pair or 2 in the UK already as well.

dave
 
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Pretty straight forward. You need a nice sharp xacto knife and some patience. I used a loop as well…my eyes aren’t what they used to be.

Dave was nice of to link an example from his website in my thread to help guide me through the process.

http://p10hifi.net/tlinespeakers/FAL/167-surgery/167-surgery.html


I made my own phase plugs and did this along with some other mods recently on my old Fostex 206e to try in my Kirishimas.

https://www.diyaudio.com/community/threads/sorting-through-my-blh-impulse-buy.394702/
 
Just a mechanical/technical note regarding my experience with phase plugs.

I have had issues with mine “migrating” until they start making contact with the inner edge of the speaker cone at the coil former junction.

I will notice this when I start hearing a slight buzzing/distortion.

As I mentioned, I made my own and perhaps this is a flaw in my design.

I don’t know if Dave has had any issues with this.

It really only requires carefully re-centering them occasionally…usually if I’ve played music enthusiastically.

I suspect it happens for a few reasons.

I used a single large headed furniture bolt threaded into the base of my phase plug.

When I installed them on the end of the pole piece they tended to rock because that surface was not perfectly flat.

My solution was to machine a larger recess in the base of the phase plug, effectively making a larger circular foot at its perimeter.

This allowed the head of the bolt to be threaded in just enough so that it was not the point which the phase plug sat against the pole piece.

Instead, the large diameter foot that I made at the edge of the phase plug was where it made contact with the pole piece.

There seems to be plenty of magnetic force holding them against the pole piece.

Perhaps my issue is that my phase plugs are made of Delrin, which is an inherently slick, even slippery plastic.

I may have to try coating the foot with some sort of rubberized paint to give it more grip.