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Old 18th March 2015, 06:25 PM   #1
Greg B is offline Greg B  United States
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Default Special Sauces and Tweaks

It's been a while since there's been much discussion of coatings and tweaks. These were a big deal back in the days of Radio Shack drivers and 69c specials.

Anyhow what are you folks doing these days?

I still like the traditional Japanese audiophile dammar varnish, usually thinned by half, or mixed from crystals to the equivalent strength. It can overdamp HF if you're not careful.

Sometimes I'll use shellac. The normal blonde stuff dries very hard and tends to increase HF. I'll usually use it on a dustcap only, in conjunction with dammar. The darker grades of shellac, garnet or ruby, or a little softer and work fine by themselves.

I've tried puzzlecoat, diluted PVA glue, latex, hairspray, and even oil varnish at various times. They all have their pluses and minuses, and can be useful.
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Old 18th March 2015, 06:32 PM   #2
xrk971 is online now xrk971  United States
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I just posted in the K'nator thread - but repeat here because you made this a new topic.

Here is an interesting "full range" driver that is not too expensive, made of paper, and has "Fostex-like" or "MA-like" peaks. It may sound fine as-is, but would be interesting to play with and add special sauce recipes to tame those peaks. For $18, a lot better than possibly ruining the nice grey charcoal bincho kenaf paper cone FF105WK.

http://www.parts-express.com/pedocs/...ions-46131.pdf

Special sauce guinea pig?
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Old 18th March 2015, 06:43 PM   #3
Greg B is offline Greg B  United States
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Yeah, we were getting to OT.

That driver looks like the perfect candidate.
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Old 18th March 2015, 07:58 PM   #4
xrk971 is online now xrk971  United States
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The other one to tweak as I mentioned in the TC9 thread to mod a TC9FD. It already has a coated paper cone and is quite smooth in response already - so not sure if any sauces are needed or would be any better. Maybe dremel tool smoothing edges of plastic basket? Adding plumbers putty to plastic basket frame? Felt absorber on rear magnet? Pole piece vent mods and removing dust cap? Replace with phase plug? For $12 ea you can't really mess up beyond price of a lunch.
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Old 18th March 2015, 08:12 PM   #5
freddi is offline freddi  United States
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which PE #? - can't get the link to work -PA130 and the MCM equivalent are pretty smooth from the getgo - thinned damar is ok on piezo paper cones - Magnetar liked Behlens violin varnish - does Bastanis use oil mixed with varnish? (assuming the two can mix -?)

http://www.thewoodwhisperer.com/arti...varnish-blend/

Last edited by freddi; 18th March 2015 at 08:15 PM.
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Old 18th March 2015, 08:18 PM   #6
xrk971 is online now xrk971  United States
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Quote:
Originally Posted by freddi View Post
which PE #? - can't get the link to work -PA130 and the MCM equivalent are pretty smooth from the getgo - thinned damar is ok on piezo paper cones - Magnetar liked Behlens violin varnish - does Bastanis use oil mixed with varnish? (assuming the two can mix -?)

Make Your Own Oil/Varnish Blend - The Wood Whisperer
#295-010
Dayton Audio PA130-8 5" Full Range PA Driver
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Old 18th March 2015, 08:23 PM   #7
freddi is offline freddi  United States
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it lacks the detail of say 4fe32 but is good on vocals - MCM has about the same speaker for $10.39 but their shipping cost can be high

MCM version in a vented enclosure with no damping - I think the drive level on
the sine sweep was high - not to overload the mic/soundcard but to play the speaker loud

IIRC, this speaker was near a house wall and sitting up a bit off the ground for the sweep
- perhaps a good sauce would bring out flavor - P10 is an experienced cook so might
suggest something. Perhaps the inner portion could be hardened then use a milder sauce for the
rest of the cone - maybe some surround damping.

I'm not sure how to link MCM products - the number is 55-1595 so maybe this crazy link would work (?)
http://r.search.yahoo.com/_ylt=A0LEV...lMBIYt1sDshDY-

if one orders 4 then the price is ~$12.39 per driver shipped

Click the image to open in full size.

Last edited by freddi; 18th March 2015 at 08:33 PM.
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Old 18th March 2015, 08:31 PM   #8
xrk971 is online now xrk971  United States
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Do you have the link to the MCM variant? Are they the same driver? You can get almost free shipping for orders under $100 at PE as their standard flat ship rate is $5.95 and basic $5 off coupon always works.

Last edited by xrk971; 18th March 2015 at 08:34 PM.
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Old 18th March 2015, 08:34 PM   #9
freddi is offline freddi  United States
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try the link below - it works for me - not sure if the same driver but superficially very close

http://r.search.yahoo.com/_ylt=A0LEV...lMBIYt1sDshDY-
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Old 18th March 2015, 08:41 PM   #10
xrk971 is online now xrk971  United States
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I think they are different. Dayton is 90dB with 20oz magnet and 92Hz vs MCM 91dB and 100Hz, and Dayton Qts is 0.49 vs MCM 0.64, xmax is 2mm vs MCM 1.25mm.
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