I have the ones from audiofriends. Mine sits with a few mm of space to the outer metal ring.

Would you please post a picture of the ring lying down all the way. It looks like that one is a better fit than the ones I have.

I did the refoaming myself on my own penta´s, and on a pair that I sold to a friend.

There has been no problems, except one funny thing we noticed the other day.

While having a blind-test on playing the penta´s with the original Beolab 200 amplifier and ICEpower 250asx2, we noticed something very strange.

This song: 

Thanks for the reply. I'm enclosing some pics.

The reason for the post is that I don't want to buy another set and find they are the same or worse that what I already have. The other linked post suggest SimplySpeakers if the Audiofriends kit fails to match the original.

I think the key differences are the outer diameter which doesn't bother me so much as long as it creates a seal all the way around, and the bump in the foam known as the 'roll' which I think needs to be thinner to allow the inner foam edge to locate properly.

I have yet to master the art of uploading multiple pics :(

double post

I recently finished refoaming a  pair of Penta IIIs using the foam rings and glue from GoodHifi.

The result and sound is very good and I don't see a reason not using the GoodHifi surrounds. 

For the inner ring I put the glue on the foam and not on the cone and as a last step I filled the small gap between the outer ring and the metal frame with glue.

Yours looks just like mine.

Regarding my previous post: I did not mean that the surrounds can´t be perfectly fitted, I meant that I can´t get them perfectly fitted with my skills.

I read about someone who tried with rubber vs foam surrounds, and they could not hear any difference. 

I am satisfied with AudioFriends. Have used them for both Penta and CX100.

I had a similar problem with mine making a slight buzzing sound particularly with piano music.. turned out one of the drivers was ever so slightly off centre. Re-re-foamed it and its been fine ever since :-)

Lee

leosgonewild wrote:

 

So they can´t be perfectly fitted :(

 

The Audiofriends surrounds are 99% accurate. I know this for sure as I'm the one who developed the surrounds in assocation with Audiofriends.

I'm no shareholder by the way and don't earn any penny with it.

The surrounds (at the moment mk3 or mk4)  fit very well. No disstortion at all.

The problem lies with the person who's responsible for glueing them 👍😁

Mostly the cause of placing them wrong (which causes distortion/scraping sound), is caused by placing the surrounds exactly around the dustcap in the middle. That's where it goes wrong. The dustcap isn't always placed exactly in the middle.
I've done I think a several hundreds of these surrounds with very good result. I test them with an B&O oscillator RC7 and an amplifier.

An example is down here. Look at the redish ring around the aluminium "coil" The distance from the red ring to the centre differs around the coil.

So when you place the surrounds exactly by eye around the dustcap, then you will end up some times with badly behaving mids.

As I'm almost doing this every day, I've have made a set of special rings with the right skew to the cone to align the surrounds the proper way.

If you place the surrounds right, then you have approximately 0,3-0,4mm space between the outer diameter from the surround and the inner diameter from the chassis.

beotkn wrote:

I recently finished refoaming a  pair of Penta IIIs using the foam rings and glue from GoodHifi.

The result and sound is very good and I don't see a reason not using the GoodHifi surrounds. 

For the inner ring I put the glue on the foam and not on the cone and as a last step I filled the small gap between the outer ring and the metal frame with glue.

These rings don't fit at all ! The inner diameter doesn't fit and is far to small. To much pressure has to used to get these fitted. And with that you're taking the the cone out of his "comfortzone". By using these,  the cone can hardly vibrate as it should be. Far to much tension on the cone.

Finally, if you will be able to get them fitted, then they become loose in time where the coil leads enter the cone. At that point the surface at the chassis is less and the Good Hifi rings can hardly be glued properly.

Lee: Yes, it is only with piano music. No other music. Re-re-foam will be done :)

Beobuddy: I did not mean to give AudioFriends a bad reputation, and I tried to clarify that in  the next post where I wrote that it was my skills that were bad, not the surrounds.