Does PVA make breakup peaks go away? Especially major ones circa 9kHz to 12kHz ones on small 4in full range paper drivers?
Has anyone tried airplane fabric covering butyrate dope? There are two varieties: taughthening (shrinks on drying) and non-taughthenting. This can be used to re-seal fabric surrounds. Maybe a thin coat on cones can work. Maybe brushed into cloth spider can stiffen suspension.
What about gluing strips of foam or EVA on the cone backside?
PVA isn't all the same. I tried diluted elmers once and it sounded plasticky to my ears. A lot of people like Mod Podge, and IMO that's a better way to go if you want to try PVA's.
For Fostex, I my favorite sauce is still a thin coat of dammar. The sound will be clearer and yet organic, and it gets rid of the papery shimmer. For FExxx series drivers, I like shellac on the whizzers and paper dustcaps, followed by dammar on the whole thing. This helps prevent any excessive dulling.
These treatments may not get rid of the peaks, but it will IME soften them. If combined with a proper contour filter or EQ, it will sound better than EQ alone.
Foam strips? done that too. Easy thing is to use foam mounting tape. This will however convert your full range driver into a woofer. Save it for cheap MCM aluminum drivers IMO. Actually, (cellouloid) scotch tape strips are nicer for damping metal cones.
Airplane dope is worth a try I think. That's one I never experimented with. I'd imagine nitrate and butyrate dopes would have different effects.
For Fostex, I my favorite sauce is still a thin coat of dammar. The sound will be clearer and yet organic, and it gets rid of the papery shimmer. For FExxx series drivers, I like shellac on the whizzers and paper dustcaps, followed by dammar on the whole thing. This helps prevent any excessive dulling.
These treatments may not get rid of the peaks, but it will IME soften them. If combined with a proper contour filter or EQ, it will sound better than EQ alone.
Foam strips? done that too. Easy thing is to use foam mounting tape. This will however convert your full range driver into a woofer. Save it for cheap MCM aluminum drivers IMO. Actually, (cellouloid) scotch tape strips are nicer for damping metal cones.
Airplane dope is worth a try I think. That's one I never experimented with. I'd imagine nitrate and butyrate dopes would have different effects.
It can.
dave
I believe this is the very first measurement by P10 that I have seen. Better frame it.
Just found this -- how to make your own puzzle coating, just mixing milk, vinegar, and baking soda:
How to Make Your Own Puzzle Coating | eHow
Anyone tried that?
How to Make Your Own Puzzle Coating | eHow
Anyone tried that?
I confess I did not know what Damar was. Saw it at the art store: $10 a little jar. Made from resin of a special tree dissolved in turpentine and used by oil paint masters of long ago. Also used to give sheen to food so apparently non toxic when used with turpentine. Nothing special - seems like water based acrylic gloss clear coat for $2 a jar from same store can work as well? Just a semi flexible damping layer.
Has anyone tried contact cement? I tuned a paper cone 3" by painting stripes from the center to the outer edge, 4 at a time, and it tamed it down as good as an inductor would do. Just curious..
DAP Products - Construction Adhesives - DAP® Weldwood® Original Contact Cement
DAP Products - Construction Adhesives - DAP® Weldwood® Original Contact Cement
not used it for a decade and can't find the bottle - very pleasant - a blurb indicates 1% vanilla content (?) - IIRC, its aroma is probably more useful than its damping effect at times - can't remember how thinning with turpentine alters the scent. Someone must have a better description.
I'd like to know ~ what Bastanis adds to violin varnish and how he cooks the treatment. On his woofers, he uses small round self-adhesive furniture pads to aid in smooth rolloff.
cool about contact cement - how wide was each strip? - were the first set done in a cross pattern?
BVR with floor exit - called a "horn"- this would make a fun knockoff with small footprint
I'd like to know ~ what Bastanis adds to violin varnish and how he cooks the treatment. On his woofers, he uses small round self-adhesive furniture pads to aid in smooth rolloff.
cool about contact cement - how wide was each strip? - were the first set done in a cross pattern?
BVR with floor exit - called a "horn"- this would make a fun knockoff with small footprint
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I might just do that.
It's worked well for me with larger paper drivers, but small 'FR', not so much. This is where Dammar excels.
GM
wonder how neatsfoot can be used? - here's use of it on old radio speakers
Nostalgia Air: TechForum: Rejuvenating Speaker Cones
damar is useful on little cones such as piezo
Nostalgia Air: TechForum: Rejuvenating Speaker Cones
damar is useful on little cones such as piezo
Next time try a radial curve pattern. Can't recall who now, but there was a manufacturer that patented this decades ago and I found it worked quite well with various type coatings including rubber cement.
GM
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