For Celestion Ditton 66’s might there be some consensus on the best material to use for foam acoustic damping?
When I had the crossovers serviced a few years ago I think that the boxes might have have been missing some foam which I’d like to make good.
Should I buy some 014-0431: Jantzen Bitumen Standard Panel, 4mm thick - self-adhesive (quite expensive, and not what was in the original cabinets) or would 014-0420: Jantzen Wool Fabric probably do the job? Or something else? Naturally, I’ll try to keep the filling as evenly matched as possible for the two speaker boxes.
I’m hopeful that attending to the damping will produce a cleaner and perhaps more dynamic/forward sound?
Have scanned through the many ’66 threads but would appreciate some advice even if it's only to direct me to the best section of a pre-existing post.
Many thanks.
When I had the crossovers serviced a few years ago I think that the boxes might have have been missing some foam which I’d like to make good.
Should I buy some 014-0431: Jantzen Bitumen Standard Panel, 4mm thick - self-adhesive (quite expensive, and not what was in the original cabinets) or would 014-0420: Jantzen Wool Fabric probably do the job? Or something else? Naturally, I’ll try to keep the filling as evenly matched as possible for the two speaker boxes.
I’m hopeful that attending to the damping will produce a cleaner and perhaps more dynamic/forward sound?
Have scanned through the many ’66 threads but would appreciate some advice even if it's only to direct me to the best section of a pre-existing post.
Many thanks.
The Celestion Ditton 66 loudspeaker came with flat profile, closed cell Acoustic Foam attached to the interior walls to provide damping of air resonances.
Similar to this:
An equivalent would be: https://www.hificollective.co.uk/loudspeaker-parts/014-0455-egg-crate-foam-30x15.html
Bituman Panels are intended to reduce the vibration of the enclosure walls
Wool Fabric is an alternative to acoustic foam.
Similar to this:
An equivalent would be: https://www.hificollective.co.uk/loudspeaker-parts/014-0455-egg-crate-foam-30x15.html
Bituman Panels are intended to reduce the vibration of the enclosure walls
Wool Fabric is an alternative to acoustic foam.
Thank Galu, appreciated.
So I guess the preferred option would be https://www.hificollective.co.uk/loudspeaker-parts/014-0455-egg-crate-foam-30x15.html
and the Wool Fabric at a lower price might (might) do a good enough job that one wouldn't detect the difference? Especially if one was just filling any gaps/absences.
Just seen:
https://www.deadening.co.uk/products/silent-coat-absorber-35-sheet
which looks (performs?) similar to the Jantzen product but is classified as open cell?
Anyway, thanks very much again.
So I guess the preferred option would be https://www.hificollective.co.uk/loudspeaker-parts/014-0455-egg-crate-foam-30x15.html
and the Wool Fabric at a lower price might (might) do a good enough job that one wouldn't detect the difference? Especially if one was just filling any gaps/absences.
Just seen:
https://www.deadening.co.uk/products/silent-coat-absorber-35-sheet
which looks (performs?) similar to the Jantzen product but is classified as open cell?
Anyway, thanks very much again.
Sound absorbent foams are closed cell and are active at high frequencies. I see no reference to "open cell" in your above link.
This UK company explains "how to use speaker damping" and indicates which "damping materials" it stocks:
https://www.qtasystems.co.uk/sitemap.htm
P.S. Wool is a very good damping material because of the random orientation of its fibres, so would be ideal for your stated purpose of filling in gaps/absences.
Thanks for the link and advice looks like a great resource, very helpful and appreciated.
The other company lists their product:
https://www.deadening.co.uk/products/silent-coat-absorber-35-sheet
within the following link/classification:
https://www.deadening.co.uk/collections/open-cell-acoustic-foam
The other company lists their product:
https://www.deadening.co.uk/products/silent-coat-absorber-35-sheet
within the following link/classification:
https://www.deadening.co.uk/collections/open-cell-acoustic-foam
Open cell acoustic foam sheet is used for speaker grilles since it lets the sound through unimpeded, as described here:
https://willys-hifi.com/products/speaker-grille-foam?variant=36589834535071
https://willys-hifi.com/products/speaker-grille-foam?variant=36589834535071
