D.M. Procida wrote:

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I don't follow why I'd need grille cloth as well as foam (originally,
there was just the foam).

They look like
http://www.audiocostruzioni.com/r_s/diffusori/diffusori-5/royd-audio-conistor/constriction%20r.jpg.


** You cannot use flat foam rectangles for that speaker, as the woofer is mounted on the surface of the baffle and there HAS to be a few mm clearance in front of the cone/surround to allow for movement.

The originals must have been sculptured to prevent cone strike.


...... Phil

In article
,
D.M. Procida wrote:
Dave Plowman (News) wrote:

In article
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D.M. Procida wrote:
I have an old pair of speakers whose foam grilles turned to dust.

Can they be replaced with any old thing? Or must I obtain special
tempered virgin linear response low distortion acoustic audiophile
expensive foam?

And how difficult is this stuff to cut?

Foam of any type is very difficult to cut neatly. Best way (if
possible) would be to use a proper speaker fabric. You'll find it on
Ebay, etc.

The foam rectangle would be inset into the surround of the speaker. As I
recall, the original had square edges and nestled in reasonably
securely.

So needs nice accurate cutting. Good luck with that. ;-)

If I were to use speaker fabric, I'd also need to create a frame that I
could fit into the surround. Foam sounds easier, if not as attractive.

Making a wood frame and using a fabric is likely going to be easier way to
get a decent looking job. Unless you can buy the original foam mouldings.
IMHO, of course.

--
*One nice thing about egotists: they don't talk about other people.

Dave Plowman London SW
To e-mail, change noise into sound.