I always buy my foam rings at Good Hifi. Good and fast service and good foam rings. On the other hand, I have no experience with Audiofriends.

I have ordered 4 replacement sets from good hifi and never had a problem

I bought the rings for my CX50 and CX100 at Good Hifi. I refoamed all six woofers with no trouble whatsoever (see separate thread with pictures). The speakers still work fine. I haven't tried rings from other sellers though.

Got mine from here, it works, but I have no experience from other dealer, in comparation with Martins they look good, same measurements, same "feel", but a little darker, nearly black, did 2 x S45, 2 x RL 140, but when you refoam, SHIM SHIM SHIM.

Avoid Simply Speakers.

I bought some rings from this web site and it looked very promising but the measurements were off by at least half of an inch! They list driver model numbers but it doesn't matter - way off.

However, dustcaps and other pieces were delivered as promised.

I have received several orders from Good Hifi for refoaming several of my CX100's over the last couple of years.

Excellent service and fast shipping.  Sure will buy again if I need more...

Just ordered some S80 rings from Good Hifi. As usual they look to be a perfect fit. Just got to get round to fitting them now.😂

Craig🙂

Dear Sir,

With Google I came to this item and I would like to give a feedback. I have checked my mail till 3 august 2011 back (NL is blocked on Ebay), but I can't find someone witch has bought these items (must be the 4"AS-5 or 4"A-2) and later on bought one again. That should also be impossible if you mentioned the problem, because if a surround gets waisted at what reason whatever we provide normally a free surround with free shipment. If we made a mistake about that please contact us, you will get the money of the extra surrounds back. If you ordered bij Ebay with an EN-account: you can't order one surround, Ebay doesn't give the possibility.

Further the original surrounds are from foam, so the new ones need to be as much as possible as the original material. If foam gets pressed to hard, it's actually not really foam anymore. It often has become a hard, stiff, material with a smooth surface, witch also makes sounds of it own. If the basematerial is right (such as with original Tannoy surrounds) it may be a thin, not hard and supple surround. But then the material get's heavier per square inch and a bit like rubber. Also not the right material if you want to keep the surround (and sound) as much as original. If you look in the book of Vance Dickason it's clear.

The surrounds can mute the vibrations (resonances) of the membrane at the edge. If the surround is very thin and very hard pressed, this is not like original. Actualy, the surround will give his own sound. With a hard pressed surround the efficiency may be higher, just like the difference between cloth and foam surrounds at the Bose 802. But hard thin pressed or medium pressed hasn't to do something with the foam quality itselves. Only the hard thin one gives a more louder noise (efficiency) at higher frequencies but often will have a sound (high Fs) of is own, because it has become a kind of hard plastic, and isn't foam anymore like original. The Fs will be higher, the lower frequencies of the midrange will be (compared with the higher frequenties) less loud. If the surround is made from heavier material the efficiency may be lower and the Fs lowers.

I'm sorry about the centeringproblem. Have you mounted the surround just in line with the cone? Sold surround are always checked before shipping. And why didn't you tell it to me? I have a lot of PDF's for all kind of problems, especially in Dutch. Further I would be very pleased to see the two different refoamed speakers. And I can send you some testsignals, especially for the midrange, so you can hear if there is any difference and if I'm right with the above story.

Best regards, Fred

Had it, wat a beautiful system! Still have the speakers with a selfmade kit to use them on any preamplifier. I had by the way a 3-day course from B&O (in that time in Hilversum - NL) (Worked at RAF in Amsterdam were they sold a lot of B&O). Was a very nice course with a lot of information. Still have the books. Further I have been years member of 'Beofriends' in NL.