Foster FE108e∑ sunk dustcaps

[FranciscoPerez]

Hi guys,
My youngest son pressed his little finger on both fostex108ez used in my Cornu speakers, and they are all sunk.
How would you guys fix this? They are quite small and the vacuum cleaner sucking option, which I use regularly on my subwoofers does not seem to be an option here. Material looks fragile, and I don’t want to further mess things up.

Any advice would be strongly appreciated!!
Cheers,
Fran

 

[Netlist]

I had success with a small piece of double coated tape but it remains a delicate operation.

Hugo

 

[GM]

Do you have a basting tube? I've used the bulb to suction small ones out.

 

[FranciscoPerez]

Thank you both!! I will try both methods and let’s see if I can solve this problem!! Cheers

 

[planet10]

Once the dustcap on any FExx8e∑ has been damaged, given the “ribbed” structure, it is VERY likiely unrecoverable.

And for the same reason i don’t think this will work: https://www.diyaudio.com/community/threads/fe12x-dustcap-fix.181603/

But this will:
http://www.planet10-hifi.com/downloads/FE108eS-PhasePlug-plan.pdf
http://www.planet10-hifi.com/downloads/FE108-PhasePlug-2.STL

dave

 

[FranciscoPerez]

Thank you Dave! Do you know where can I source those phase plugs already made?

 

[planet10]

I no longer make them hence the plans. The STL could be taken or emailed to a 3D print shop.

dave

 

[FranciscoPerez]

Thank you! Will do Dave. Is the material here of importance? And any advice for removing the current dust cap?

 

[planet10]

We made ours from wood, but material is not overly critical.

Most 3D prints will be PLA which works fine. Scres in the base to attach to the pole piece

Dust Cap removal: http://www.planet10-hifi.com/pp-install.html

dave

 

[FranciscoPerez]

Great!! I’ll post my result soo

 

[nandappe]

I am using the FE108SS-HP without the dust cap.
The annoying mid-to-high-range tones from the dust cap are suppressed, and it sounds good.

 

[planet10]

I’d put at least a felt plug in there to eat up the cavity resonance.

dave

 

[R1234]

Just came across this thread. - Obviously too late now, but a technique that works for dented dustcaps is to get a pin & put a tiny amount of contact cement on the head & touch it on to the cap & let it thoroughly set. Then later you can pull on the pin to withdraw the dent. You can then remove the pin with a drop of mineral turps.

However, as you have now removed the cap, simply get a new slightly larger one, & glue it upside down so it is now concave.
Simple cheap & probably better response than the original.

Ron.