[Poultrygeist]

I salvaged these old Sansui FR woofers from some trashed enclosures found on the curb. They were ugly and badly discolored so I painted the cones with something called "The Wet Look" from PE. Not only do they look better but the sound improved enough to try them in these "I" baffles.

[planet10]

Dots on the cone isn't going to alter the driver in any way

Some would beg to differ.

dave

[Danny Richie]

Some would beg to differ.

dave

Yeah I know. I tested and measured a set of my M-130 woofers with it on there and could not find any measured difference. I also did some extensive side by side A/B listening test and could not detect any audible differences either.

[planet10]

In a blind A/B with source material that has a good soundstage it takes me no time at all to pick out the EnABLed pr of speakers

dave

[JLM]

Some would beg to differ.

dave

EnABLing my Fostex F200A drivers made a very noticable (subjective) difference.  Real research involves postulating, testing assumptions, and keeping an open mind.  The rest are welcomed to join the flat earth society.  (I'm a licensed engineer who is not a proponent of technology for it's own sake or because it's cool/fun.)

[Danny Richie]

In a blind A/B with source material that has a good soundstage it takes me no time at all to pick out the EnABLed pr of speakers

dave

I am real big on using A/B listening comparisons to find or confirm differences. I heard clear differences when I A/B'ed the drivers with and without painted dots on the cone too. But it had to do with driver burn in time and not dots on the cone. Burn in time being equal the drivers sounded the same.

What is it that you think the dots might be achieving that would result in an audible difference? I honestly looked hard for anything, but could not find a thing. 

[JohnR]

I hesitate to point out the obvious, Danny, but since this is the full-range driver circle, the (pertinent) discussion is about full-range drivers....

[Danny Richie]

Real research involves postulating, testing assumptions, and keeping an open mind.

I agree. Feel free to have a look at my test results and please let me know if there is still something I may have overlooked that could show some difference that the dots can make.

http://www.audiocircle.com/index.php?topic=59575.0

[JohnR]

I agree. Feel free to have a look at my test results and please let me know if there is still something I may have overlooked

Did you overlook that you are testing a woofer instead of a full-range driver?

[Danny Richie]

I hesitate to point out the obvious, Danny, but since this is the full-range driver circle, the (pertinent) discussion is about full-range drivers....

Yes, I understand, and I have done a lot of work with full range drivers. I even designed a network for a full range driver design that is a commercially available speaker.

The thread was about driver modifications. I have done some extensive work in that area as well and have contributed to that discussion.

[Danny Richie]

Did you overlook that you are testing a woofer instead of a full-range driver?

The woofer that I tested was played full range and has good output to 10kHz. I think the test concerning that mod was no less valid using that particular driver.

It was the driver that I was sent for testing by a customer. I did not request it.

If someone would like to send me a driver with a more extended range to test this mod on then I will be glad to go through the testing process again (my time permitting) as soon as I can.

[JohnR]

The thread was about driver modifications.

The thread is about "DIY" modifications to full-range drivers.

[Danny Richie]

The thread is about "DIY" modifications to full-range drivers.

I recommended a DIY frame dampening mod in my first post.

[JohnR]

Wait till you see my latest "DIY driver tweak". I suppose I should go take a photo of the carnage...

[Æ]

I recommended a DIY frame dampening mod in my first post.

You recommend dampening!

I recommend damping, not quite as wet.

http://en.wikipedia.org/wiki/Damping

[Danny Richie]

Thanks AE for the correction. And I knew that but still keep typing dampening. At least I got it right in my first post. 

[planet10]

The discussion of dampening vrs damping has gone on a number of times. In the appropriate context they are synonyms, both are correct in the given context.

http://www.merriam-webster.com/dictionary/dampen

dave

[Danny Richie]

The discussion of dampening vrs damping has gone on a number of times. In the appropriate context they are synonyms, both are correct in the given context.

http://www.merriam-webster.com/dictionary/dampen

dave

Alright, I was right either way! 

Thanks Dave. 

[Æ]

The discussion of dampening vrs damping has gone on a number of times. In the appropriate context they are synonyms, both are correct in the given context.

http://www.merriam-webster.com/dictionary/dampen

dave

Actually I prefer it really wet, dampenenenenenenenenenenenenenenenenene neneing.

[Æ]

The discussion of dampening vrs damping has gone on a number of times. In the appropriate context they are synonyms, both are correct in the given context.

http://www.merriam-webster.com/dictionary/dampen

dave

No reason to call it dampening, when you are educated enough to know what damping is.

Those little felt pads in a piano that touch the strings are called dampers, not dampeners. Controlling the vibrations, eh.

http://www.piano.christophersmit.com/damper.html