Sound proofing material in loudspeakers?

[Brian]

Anybody ever thought of using this Noise Stop Systems either inside loudspeakers with damping material on top, or even sandwiched between layers of wood while making a cabinet?

Could this be a good thing, or definitely bad?

Brian

[petercom]

If it is a 'mat' then it would probably need to be sandwiched. It depends on whether it is good at resisting transmission of sound through it or whether it is meant to be an absorbent for incident sound waves. It would also be useful to see what frequencies it works for.

However it is not heavy enough (7Kg per sq.m) to provide good mass damping. Therefore it is not, as is stated, a substitute for lead. For example our Soniqs Panel Damping Compound (see http://www.world-designs.co.uk/acata...ker_Parts.html ) is about 20Kg per sq.m. and, because of its mastic nature, makes a good surface contact and it's butyl rubber constitution makes it an excellent LF sound absorber too.

[Brian]

Originally Posted by petercom

If it is a 'mat' then it would probably need to be sandwiched. It depends on whether it is good at resisting transmission of sound through it or whether it is meant to be an absorbent for incident sound waves. It would also be useful to see what frequencies it works for.

However it is not heavy enough (7Kg per sq.m) to provide good mass damping. Therefore it is not, as is stated, a substitute for lead. For example our Soniqs Panel Damping Compound (see http://www.world-designs.co.uk/acata...ker_Parts.html ) is about 20Kg per sq.m. and, because of its mastic nature, makes a good surface contact and it's butyl rubber constitution makes it an excellent LF sound absorber too.

Peter

I didn't realise you sold this kind of stuff.

Does the material you have need to be sandwiched between layers of wood? I'm trying to make the KLS3's more 'dead', I'm sure the bass could be better if the cabinet walls didn't seem to resonate as much as they do.

Brian

[petercom]

No, it is designed to be applied directly to the interior of cabinet walls. We use it in the WD25T to good effect.

It is self-adhesive and easily malleable.

[pre65]

Brian-my KLS3 walls dont seem to resonate.

did you make them yourself and if so what did you use for cabinet materials and did you use the proper carpet material inside ?

Philip

[Paul Welsby]

How about adding some external bracing? Some wooden braces on the outside of the cabinet would surely help stop and "resonance".

Well actually it will only move the resonant frequency to somewhere else but could still help the bass.

Might not look too good however.

Paul

[Greg.]

Hi Brian,

Yes, I was surprised by your comments on cabinet resonance, because my three's don't have it, or at least, it's not noticable. No further bracing should be needed if the original cabinet build is correct. Are we going backwards and having to look again at the previous owners attempts on the cabinets?

I'm sure WD damping material is excellent, but you really shouldn't need to use it after all the work we've done to get your sound right. I can feel a visit coming on sometime How about me loading up my three's and visiting so we can do a direct comparison in your system?

Best wishes,

Greg

[pre65]

Hi Brian/Greg-good idea !
i sometimes wish i could compare mine with a known "good" pair,but with Greg at Bristol and Brian at ? is is difficult.
why dont all members enable their approximate location in their user CP,cant see any reason why it wouldn't be a good thing.
although i built my Adires to more suit the 300b s/e i am tempted to build an amp to more suit the KLS3,as they are so good with 15 WPC or more.
just as you think you've got it right you find you havn't.


Philip

[Brian]

Originally Posted by pre65

Brian-my KLS3 walls dont seem to resonate.

did you make them yourself and if so what did you use for cabinet materials and did you use the proper carpet material inside ?

Philip

Philip

The cabinets were made by someone else, I bought these secondhand. The plan was always to build new cabinets, I've just never done it. They did need a lot of work, the crossovers were in a state and the felt wasn't right. Taking a lot of advice from Greg at the time I've replaced the stuff inside with better carpet felt. It's not as thick as it's meant to be, so I just used extra layers to boost the thickness, but the material is ok.

Resonate might be the wrong word tbh. I put my ear to the side walls and it just seems to be a bit too much coming through the sides of the cabinets.

Brian

[Brian]

Originally Posted by Greg.

Hi Brian,

Yes, I was surprised by your commemnts on cabinet resonance, because my three's don't have it, or at least, it's not noticable. No further bracing should be needed if the original cabinet build is correct. Are we going backwards and having to look again at the previous owners attempts on the cabinets?

I'm sure WD damping material is excellent, but you really shouldn't need to use it after all the work we've done to get your sound right. I can feel a visit coming on sometime How about me loading up my three's and visiting so we can do a direct comparison in your system?

Best wishes,

Greg

If you're prepared to go to those lengths Greg then you're more than welcome. That's a great offer.

Brian