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Audio/Video Gear and Systems => Critic's Circle (Equipment Reviews) => Reviews of Accessories => Topic started by: topround on 9 Oct 2007, 10:26 pm

Title: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: topround on 9 Oct 2007, 10:26 pm
OK I ordered some felt tweeter surrounds from diffractionbegone.com.
Spoke to Jim and he sounded like the real deal AND he offered all AC members a special price of 29.95 a pair for the felt tweeter surrounds.

Just got them today and WOW!! They really work. :dance:

After 3 songs this is what I hear.

My speakers disappear, imaging improves... alot
Sound is way more natural, piano has weight, drums have weight(strange) :dunno: :drums:
I did a high volume job on a song that can get a bit rough and WOW handled it with ease and it sounded so natural. Maybe it is system dependent but damn I am ordering another pair for my GR research av2's. Very clean and natural warm sound. So real .

Give it a try, we spend hundreds on tweaks here is a cheap one that I think works, if you don't like it send it back for a full refund... let's see the magic clock, or colored pebbles in the corner tweak do that!!! :lol:

Just some preliminary thoughts.....more to follow
(http://www.audiocircle.com/gallery/albums/userpics/48289/reflection_vienna.jpg)


More to follow

mike
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: satfrat on 9 Oct 2007, 11:23 pm
NOW I'm psyched!  :hyper: Where's mine Jim? J/K  :lol: They'll get here when they get here. I ordered 4 Surrounds for my 4 Lorelei's, not that I feel they need them mind you. My Lor's have already done a marvelous job of disappearing in their bottomless pits of depth perception BUT,,,,,, just curious I guess. My concern here is will these Surrounds image my Lorelei's in such a way as to pull them out of their depth (don't want that by all means) or will they only add to the depth with an even sharper depth perception? Intriging to say the least and Jim's substantial price reduction was enough to push me to action. There's really not much more I can do with my system as it stands now and I don't play the merry-go-component game that is an audiophiles fortay. So I wait,,, will these Surrounds stay or go back home?  :dunno:

To be continued,,,,
Robin
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: topround on 9 Oct 2007, 11:46 pm
Robin,
you seem to have many tweaks!

This one will surprise you, it surprised me.

I like it! For me it helped make the speakers disappear and make the soundstage very real.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: Sonny on 9 Oct 2007, 11:51 pm
Robin,
you seem to have many tweaks!

This one will surprise you, it surprised me.

I like it! For me it helped make the speakers disappear and make the soundstage very real.

Mike, did the felt reduce any of the edginess or high frequency glare???
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: topround on 10 Oct 2007, 01:13 am
Sonny,
yes it did reduce glare and edginess.
It seems like it cleaned up the high end, taking off the edge and allowing more info to be clearly represented.
I don't understand the acoustic science behind it, but it works.
Two little velcro tabs attach to the top of the surround felt, making it easy to remove and reattach.
Give it a try, if you don't like it send it back.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: F-100 on 10 Oct 2007, 01:31 am
Isn't this the same concept that VMPS had been using on their speakers??

(http://vmpsaudio.com/pics/626R_FSTrosewood.jpg)
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: texendo on 10 Oct 2007, 02:12 am
I've done a similar tweek to my last four sets of speakers for about 4 bucks.  Go to your nearest general store of any sorts and get some of those adhesive wool felt dots that you place underneath a lamp for instance to keep it from scratching the finish on a table.  Place one of those dots on each screw that secures each of your drivers.  Makes an absolute sick helluva improvement at any cost, much less 4 bucks.  The cosmetic impact on your speakers is negligible as well.  If for some reason you shouldn't like it, it's very reversible.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: topround on 10 Oct 2007, 02:37 am
Larks Tongue
You may want to throw a nice Mundorf cap on that tweeter, say silver in oil if it would fit.

Also the surrounds help, hot or not. I look at all the money I have spent and 30 bucks is nothing, nothing. I think you will like what you hear.
Damn if you don't like it send it back!
BTW those Mundorf caps are wonderful.
My next speaker will have a completely Mundorf crossover :drool:
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 10 Oct 2007, 04:35 am
F-100-  Hi.  Yes.  I believe it's the same principle.  I recently sent out some narrow panel strips for the midrange planars on the next size up VMPS.  I can let you know what the customer says once he replies. 

Tex-  I confess that I'm a little surprised by your experience.  My theory is that there is more work to be done than 4 small spots of wet wool (the industry trade name for wool mixed with synthetic fiber) can handle but your acclaim for your mod is powerful.  But if you think you're wetting your pants now . .

Thought it appropriate that I answer F-100 and I don't actually know if you would experience an improvement or not, Tex, but I suspect you would, quite obviously.  What I can tell you and all is that I've been to the country store, too, and experimented with different grades and shapes before arriving at what I use and make available.  And I cut to any specifications so long as I believe that it wouldn't be detrimental to the result.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: TheChairGuy on 10 Oct 2007, 05:00 am
Not to upstage Jim's stuff as it likely works as intended...but Andrew Marshall of Audio Ideas has sold a product called The Imager for almost 30 years that works similarly.  I bought a pair for the same $20.00 that they charge today almost 20 years ago for my (then) bookshelves and was rewarded with better imaging as a result.

They're on a version II now I see...

http://www.audio-ideas.com/reviews/aig-tweaks.html

For $20 or $30 a pair, it's probably a very cost effective tweek in many instances.  Except mine today as I have a top-mounted Linaeum tweeter  :|
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: F-100 on 10 Oct 2007, 05:11 am
Hi Jim,
  I'm interested in your product. What would you recommend for my Mini Strata? One set for the tweeter and another for the midrange planars? Thanks.

(http://www.av123.com/images_dynamic/speakers_78.jpg)
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: Jim N. on 10 Oct 2007, 05:30 am
Not to upstage Jim's stuff as it likely works as intended...but Andrew Marshall of Audio Ideas has sold a product called The Imager for almost 30 years that works similarly.  I bought a pair for the same $20.00 that they charge today almost 20 years ago for my (then) bookshelves and was rewarded with better imaging as a result.

They're on a version II now I see...

http://www.audio-ideas.com/reviews/aig-tweaks.html

For $20 or $30 a pair, it's probably a very cost effective tweek in many instances.  Except mine today as I have a top-mounted Linaeum tweeter  :|

I have used these for 18 months on my Loreleis and I like them. Can't beat the price. They blend in fairly well with the tweeter. It's difficult to tell that they are an add-on.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 10 Oct 2007, 05:59 am
Those rings that The Chair Guy is referring to are made from neoprene.  I’ve done my homework.  To give respect where respect is due, the copywriter makes no mention of absorbency and that’s good because neoprene is buoyant.  It’s what they make wet suits out of and it can’t be very expensive to begin with because of where it comes from . . old tires.  I’ll stand on the acoustical properties of felt.  If it’s good enough for piano hammers, well, you know.  I imagine that those rings are interrupting the waveforms that spread across a speakers surface somewhat (i.e. that’s all it could be doing).  My little contribution does quite a bit more than that.  There won't be anything coming off your baffles to be reflected, diffracted, or to intersect with anything, hence no early reflection mixing in with the primary signal at your listening position.  Heck, there is even a curtailment of energy hitting your side walls.  And that, my friends, is the reason behind what you would hear analytically and feel emotionally.  And you'll love the improvement, I have no doubt.  Anybody using those devices can and should upgrade, is what I say.

 

F-100-  Allow me to respond to you by PM tomorrow.  Thanks.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: Adamay on 10 Oct 2007, 06:33 pm
Hi Jim. You have a PM.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: ooheadsoo on 10 Oct 2007, 06:44 pm
Mucho Info here on lesser synthetic felt vs. good high wool content felt, like Jim uses.  Boo for neoprene, it doesn't even register.

http://speakerdesign.net/home.html
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: EDS_ on 10 Oct 2007, 07:12 pm
Not to upstage Jim's stuff as it likely works as intended...but Andrew Marshall of Audio Ideas has sold a product called The Imager for almost 30 years that works similarly.  I bought a pair for the same $20.00 that they charge today almost 20 years ago for my (then) bookshelves and was rewarded with better imaging as a result.

They're on a version II now I see...

http://www.audio-ideas.com/reviews/aig-tweaks.html

For $20 or $30 a pair, it's probably a very cost effective tweek in many instances.  Except mine today as I have a top-mounted Linaeum tweeter  :|


Hi Chairguy,


I cannot, I think anyway, use the wool sheeting on my Spendors and use their grill covers.  So I ordered three sets of the neoprene rings.  One set will be applied to my Spendor S5e and two sets to my Hsu horns in my AV system.

I'll report back with my thoughts.

Thanks for the tip.


Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: TheChairGuy on 10 Oct 2007, 07:17 pm
Great link ooheadsoo  :thumb:

Felt has long been used for this purpose...anyone remember the old Spica speakers from the 80's?  Outrageous imaging was their forte....both for their time-aligned/driver cabinet design and substantial use of felt for diffraction purposes

http://cls.audiogon.com/cgi-bin/cls.pl?spkrmoni&1196705081
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: satfrat on 10 Oct 2007, 07:22 pm
Not to upstage Jim's stuff as it likely works as intended...but Andrew Marshall of Audio Ideas has sold a product called The Imager for almost 30 years that works similarly.  I bought a pair for the same $20.00 that they charge today almost 20 years ago for my (then) bookshelves and was rewarded with better imaging as a result.

They're on a version II now I see...

http://www.audio-ideas.com/reviews/aig-tweaks.html

For $20 or $30 a pair, it's probably a very cost effective tweek in many instances.  Except mine today as I have a top-mounted Linaeum tweeter  :|

I have used these for 18 months on my Loreleis and I like them. Can't beat the price. They blend in fairly well with the tweeter. It's difficult to tell that they are an add-on.

Hi Jim N, just a thought but for the price of minimal return shipping, you might want to A/B these wool squares on your Lorelei's. Not saying that what you have now doesn't improve your imaging but aren't you curious to hear if that imaging can't be made optimal? For the $5 return shipping, WTF!   Wink2

Robin
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: TheChairGuy on 10 Oct 2007, 08:04 pm
You're welcome - do let us know how they fare.  The originals really worked on my old 3D Acoustics bookshelf speaker from long ago.

Those Hsu horn bookshelves are interesting little buggers for the money....

It would be interesting if anyone could A vs. B the neoprene rings for $29 pair versus the felt squares from Jim Goulding for $30.00.  The difference is negligible if indeed the felt works better  :)

John

Hi Chairguy,


I cannot, I think anyway, use the wool sheeting on my Spendors and use their grill covers.  So I ordered three sets of the neoprene rings.  One set will be applied to my Spendor S5e and two sets to my Hsu horns in my AV system.

I'll report back with my thoughts.

Thanks for the tip.



Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: satfrat on 11 Oct 2007, 12:44 am
Quote
It would be interesting if anyone could A vs. B the neoprene rings for $29 pair versus the felt squares from Jim Goulding for $30.00.  The difference is negligible if indeed the felt works better 

And you would know this how?  :o
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: doug s. on 11 Oct 2007, 01:34 am
because the cart guy is good at math, & knows $30 is only one dollar more than $29!  negligable difference!   :lol:

doug s.

ps - my old meret re's have a similar felt baffle built right in to speaker grilles; they are tapered at ~45* angle at the driver edges... they do work...

Quote
It would be interesting if anyone could A vs. B the neoprene rings for $29 pair versus the felt squares from Jim Goulding for $30.00.  The difference is negligible if indeed the felt works better 

And you would know this how?  :o
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: satfrat on 11 Oct 2007, 01:54 am
because the cart guy is good at math, & knows $30 is only one dollar more than $29!  negligable difference!   :lol:

doug s.

ps - my old meret re's have a similar felt baffle built right in to speaker grilles; they are tapered at ~45* angle at the driver edges... they do work...

Quote
It would be interesting if anyone could A vs. B the neoprene rings for $29 pair versus the felt squares from Jim Goulding for $30.00.  The difference is negligible if indeed the felt works better 



And you would know this how?  :o

DUH!  :banghead: I really gotta learn to read.  :lol: I thought he was saying the felt/neoprene audio difference would be negligable,,,, not the price.  :duh: My apology's (again) Chair Guy.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: doug s. on 11 Oct 2007, 01:58 am
i know what you thought - to be honest, so did i, at first.  the cart guy's comments are a bit confusing - his english teacher would not be happy.   :wink:

doug s.
because the cart guy is good at math, & knows $30 is only one dollar more than $29!  negligable difference!   :lol:

doug s.

ps - my old meret re's have a similar felt baffle built right in to speaker grilles; they are tapered at ~45* angle at the driver edges... they do work...

Quote
It would be interesting if anyone could A vs. B the neoprene rings for $29 pair versus the felt squares from Jim Goulding for $30.00.  The difference is negligible if indeed the felt works better 

[size=25DUH!pt][/size]  :banghead: I really gotta learn to read.  :lol: I thought he was saying the felt/neoprene audio difference would be negligable,,,, not the price.  :duh: My apology's (again) Chair Guy.

And you would know this how?  :o


Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: DaveC113 on 11 Oct 2007, 02:21 am
Has anyone tried them on 4.5" single driver speakers?

Dave
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: TheChairGuy on 11 Oct 2007, 02:24 am
Actually, my math is awful...the neoprene rings are $10.00 each so two are $20 (it wasn't so much math actually as a typo  :( ).  Jim Goulding's felt is $30.00.

$10.00 - negligible difference nonetheless in this crazy hobby  :)

John
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: Jim N. on 11 Oct 2007, 02:46 am
It appears to be 9.99 per set of 2 imagers + shipping from The Great White North. I forget what I paid for my set but I think it was about 15 bucks shipped for the pair. I am not sure if AIG is in business anymore as they stopped their print mag and went web only.

I'm not sure about A-B between these and Jim G's since I don't know how well the adhesive backs would take to being removed and reattached. 

Regardless, these and Jim G's sure fall into the "cheap tweak" category. I can't see any reason why Jim's would not be at least as good as the AIG ones.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: rajacat on 11 Oct 2007, 02:54 am
Has anybody tried a ScotchBright pad for a diffraction device? :scratch: :)  :wink:

---Roy
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: ooheadsoo on 11 Oct 2007, 05:19 am
Please don't get those neoprene rings.  They fully admit they reflect and therefore will also diffract, defeating their purpose.  You can see the effects already in synthetic wool, which is still much more absorbent than neoprene!
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 11 Oct 2007, 06:17 am
Again, bro.  Thank you.  But you are not misleading readers.  I have picked up eight new orders in the last 24 hours on speakers I've never seen let alone heard but they are all candidates.  One cat has just upgraded his Merlins (one I know about very well) and bought a new Joule pre.  The Merlins are perfect cause of their large flat baffle.  I'm making panels for midrange planars for two cats.  I've done this before for some VMPS towers.  No neoprene rings can hang here.  You know what bugs me is that this began as a well intended forum that has become about two products ever since the facilitator interjected his remarks.  If this were about a new speaker would he have thrown in another speaker?  I would certainly hope not.

This tells me that he doesn't understand the significance of what is to be had altho he would have readers believe he does.   Better imaging . . that's only a part of it, but, I suspect, that's all he knows.  Again, thanks, Head, for your perception and comments.   
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: Jim N. on 11 Oct 2007, 07:56 am
Wasn't intending to thread crap here. The concept has been around awhile but obviously the execution could be improved. I'd be open to buying them if they can be readily removed. They are certainly inexpensive. Felt does seem a better material than neoprene.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 11 Oct 2007, 08:34 am
I think Jim N. was refering to removing what he had which is self adhesive.  Keep it in stow, facilitator, allow me . . only slightly in my experience which could be removed with a little effort and without damage to my speaker surfaces.  I fancy the idea that my adhesive tabs leave a wee bit of space between the fascias and the cabinet surfaces for air to breathe.  What comes in, is less likely to get out is my theory.  And they are removable and reusable without any residue being left behind, of course.

Jimmy- Trust me, if it's not too much to ask, it is.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: TheChairGuy on 11 Oct 2007, 10:02 am
You know what bugs me is that this began as a well intended forum that has become about two products ever since the facilitator interjected his remarks.  If this were about a new speaker would he have thrown in another speaker?  I would certainly hope not.

This tells me that he doesn't understand the significance of what is to be had altho he would have readers believe he does. 

Pardon me, Jim Goulding (and Robin/satfrat)...but perhaps you haven't noticed the circle this was placed in?  It's called 'Review of Accessories' and it's an enthusiast circle, not any exclusive domain of any one manufacturer. Audiophools are free to ask questions, and make commentary on the review and offer up alternatives, or whatever else pithy statements are usually made in enthusiast circles.

Had this topic been placed in the 'Industry Ads' circle, it might have been bad form to interject about a 'competing' product to your own.  But, as I owned these neoprene rings almost 20 years ago, and found them to be at least somewhat helpful for imaging back then, and that this was an enthusiast circle (besides any fact that I'm a Facilitator on this particular one, I am an enthusiast with no commercial ties to anyone), my comments were acceptable, at the very least.

Yes - if the Review were of a Loudspeaker, enthusiasts could make mention of another speaker brand in response - as long as it was all kept fairly sane and civil.

Did you or did you not say you got 8 orders in the past 24 hours?  And, how much have you paid for your 'membership' at Audio Circle in order to receive these orders?  The answer is nothing/nada/zip/zilch...and that you have financially benefited from your participation on a topic that now stretches to 4 pages.  Were it not for my interjection about those neoprene rings, this topic likely woulda' peetered out two pages ago and wouldn't have gotten this many views....so count your blessings. 

Before you take a high-fallutin' dump on either Audio Circle or the fully volunteer / unpaid efforts of Facilitators here.....get your facts in order, please. 

I could have PM'ed you this, but as satfrat/Robin later aped your less-than-correct statement, I thought I'd address this openly:

This is an enthusiast circle, not the domain of any one manufacturer.  I personally don't take lightly parasite manufacturers successfully marketing and selling their wares for free here, then crapping on the very mechanics that have been set-up and allowed for it in the first place.

Quote from: Yahoo Education Dictionary
  par·a·site    audio  (pr-st)  KEY 

NOUN:

   1. Biology An organism that grows, feeds, and is sheltered on or in a different organism while contributing nothing to the survival of its host.
   2. One who habitually takes advantage of the generosity of others without making any useful return.

You may well be a decent chap, but your facts are waaaay out-of-whack.

John / The ChairGuy / Facilitator
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: FredT300B on 11 Oct 2007, 10:22 am
Jim, did you say somewhere they're available in black felt? I'm just completing the DIY speakers linked below. The baffles on mine will be black, and black tweeter surrounds would be far less obtrusive. If they're available in black I'll PM you with an order. (Pleeeease, nobody mention this on the line array circle - everybody will think I'm a traitor).  :lol:

http://www.geocities.com/cc00541/Statements.html
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 11 Oct 2007, 11:21 am
Freddie-  Would you mind sending me an email at my regular ole email address-  jimdgoulding@yahoo.com.  A PM makes it hard to identify in my mailbox cause I can't tell who it's from amongst many.  This way we can keep our conversations together and more easy for me to reference as I may need to refer back several times depending.  I would appreciate it, EVERYBODY, if you would indulge me this.  Thanks and Good Morning. 
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: brj on 11 Oct 2007, 03:46 pm
Lest there be any confusion...  my choice of words may have differed a bit from TCG, but my position on this thread, as the other facilitator of the combined Critic's Circles, aligns perfectly with his.

This set of circles is intended for users to post reviews of audio gear they own or have auditioned extensively, hopefully with enough background that the review allows other users to gauge the possible impact of that component in their own system and how it might align with their own audio preferences.  All manufacturers are encouraged to comment and provide any needed clarification, but this is not the Industry Ads (http://www.audiocircle.com/index.php?board=17.0) or Industry Talk (http://www.audiocircle.com/index.php?board=122.0) circle.  For everyone's clarification, I strongly suggest that all parties read the recently updated Critic's Circle Guidelines (http://www.audiocircle.com/index.php?topic=45439.0) prior to posting a review.

To make a few general recommendations...  If you are new to AC, I would recommend reading those sets of site guidelines (http://www.audiocircle.com/index.php?board=117.0) that apply to you as a regular member, industry participant, etc..  In addition, most circles have their own guidelines, and I would suggest reading them before posting in that circle for the first time.

Thank you!

Edit: Bold-faced the links to make them standout better against the background
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: TheChairGuy on 11 Oct 2007, 04:58 pm
ha - in this case - Brian/brj is actually the good cop here (Facilitator); he's not just playing the role   :icon_lol:

Most joking aside - we both want manufacturers to succeed and use Audio Circle for their benefit - but please understand we must be fair to all. And, primarily, this site is for enthusiasts...if it were not, you wouldn't want to sell your wares here anyhow 'cause there wouldn't be anyone to sell to.

Ciao, John (the not-really-so-bad-cop)  :wink:
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: ooheadsoo on 11 Oct 2007, 07:12 pm
What is the purpose of the air gap?  As I understand it, the sound from the tweeter will travel right across the face of the cabinet.  If there is a gap, doesn't that mean that some sound will "sneak" through and diffract off of the cabinet edges?
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 12 Oct 2007, 05:33 am
Probably little or no significance, really, in the way you speak of as it’s less than an eighth of an inch altho it’s not like I’ve seen anything on a scope.  Something about energy being converted to heat.  That’s what the technical editor of Positive Feedback tried to explain to me.  She’s a lady with a good mouth on her until she begins to talk technical and then she’s all business.  She and her husband are both engineers and design and manufacture audio products from Jenalabs.  About my surrounds she said and I quote “the right stuff for the right angles”.  Think I’ll call her and see if I can pin her down.  I have another reason that I alluded to in Industry Talk.

Indulge me here, Head, and allow me to respond to brj and Chair Guy.  Using this space should in no way imply that Head is anything less than neutral.

Ya’ll kinda closing ranks on me, huh.  Actually, I when first chimed in on this discussion it was to answer a question by F-100 and get on the playing field with Tex and DIY’s.  I lacked the confidence that would happen on its own.  Later, it appeared to me that the discussion was veering away in (that was say "from", for what it's worth) the direction I hoped it would go.  Silly me, of course, this happens.  But it was an interjection by a facilitator that caused this who I now know was interjecting as an enthusiast.  That simple thing escaped me.  Were I a facilitator myself, however, I wouldn’t have done that.  My judgment would have prohibited it.  You realize Chair, you dropped a competitor right into the mix.  As an enthusiast, however, I can relate.  No foul.

Just to add a counterpoint to some of the points made by Chair Guy, I have a high opinion of The Audio Circle.  Chair, my point was with you only, and I, too, have contributed to the life of the discussion and elsewhere, I believe.  I am an enthusiast, also, above anything else I might be, and that’s the reason I’m here.  I think you implied differently.  I’ve learned about a lot of stuff I had no knowledge of before and from a lot of people whose opinions I have the highest regard for.   

I offered an Audio Circle members’ price and while that has proved beneficial, that’s a two way street.  Members, too, are beneficiaries and the idea was given to me right here on Audio Circle.

Chair, you’re closing remarks were rather piqued, but I believe you felt insulted and so I understand where you were coming from.  I apologize for riling you.  Nobody wins from a row. 

brj, your point is well taken.

Regards, Chair, all.


.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: TheChairGuy on 12 Oct 2007, 08:57 am
Jim -

I don't really understand your circuitous logic on the event....this is a User/Enthusiast circle; my comment(s) was neither rash, wrong or in poor taste.  It was simply, relevant, and timely to the discussion at hand.  Although we recognize that you were an audio enthusiast first and foremost....you lost that first-tier status to that of Industry Participant / Manufacturer now.

If you stop actively making your anti-diffraction rings...you can have your old status of user / enthusiast back......but, until that time, you lose that primary status to that of Industry Participant / Manufacturer.

That's why we make such a big deal about proper sign-offs for Industry Participants....to make sure everyone knows 100% that your views are certain subjects isn't altogether neutral because you have a financial stake in some of them.  You had issue with that not long ago when it was pointed out to you - I have no idea why other than you are a stubborn Texan (frankly, a mostly endearing trait to me, at least  :wink:)

I hope you sell 100,000 of these rings to folks and I hope folks elect you to the Audio Hall of Fame for them....but you have financial incentive to sell them and you don't own this circle (neither do I or brj for that matter).  It is a circle where members of all types, Non and Industry Participants, may discuss equipment freely without censorship efforts from the makers under discussion. If you tried to squelch any members right to participate by introducing a competitors name, I would have responded the same to you.  It was only happenstance or coincidence that the member was indeed me  :roll:

Bottom line: stop immediately any attempt to censor efforts to make relevant points about your product or introduce comments about competitors here.  It is allowed - what you would do using your judgement is an aside.  You really don't have an issue with me - your issue is with understanding the rules (of which I am no stickler, I assure you, brj flies that subject narrower than I do) for posting in this circle. Learn 'em and all is rosy with me.

I'm a 'glass half full' kinda' guy and my grudges are short-lived, so let's get on with life in relative harmony  :beer:

:rock: (Longhorn sign - or closest to it I could find)
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: woodsyi on 12 Oct 2007, 11:52 am
Jim,

Why don't you put an advertising post on the Industry Ads circle?  Mentioning competitive products in a thread in that circle would be bad form. 

Since we are in the critic's circle, I have couple of questions.  What thickness is your felt and is it advisable to use such on a tweeter with a wave guide?

Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 12 Oct 2007, 12:48 pm
Der Wood.  It's 3/8th of an inch thick and I think that the purpose of a waveguide is to help eliminate, at  least curtail, the spreading of sound waveforms.  In your case, my product may be redundant or have only a nominal effect.  Thank for your advice, really.  Happy listening.
Title: Express to der Chair, with love
Post by: jimdgoulding on 12 Oct 2007, 12:52 pm
Goodness gracious.  I’ve covered all of this already.  I admitted to my fault.  My intention couldn’t possibly be interpreted by an objective mind as an attempt to censor.   You’re officiousness is transparent.  Nevertheless, I understand the information for those who need to know and it is my intention to abide.  You ever see that movie, my man, where at the end of the trial and tribulations of his protagonist, the director, Lindsey Anderson, smacks Malcolm McDowell in the face (Oh Lucky Man)?  We’re lucky to be alive, mate.  Relax.  You have my affection for what you extended to me and I admire your final gesture.  Likewise, I’m sure.

PS-  You know I don't make rings.  Give it up.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: woodsyi on 12 Oct 2007, 01:11 pm
Der Wood.  It's 3/8th of an inch thick and I think that the purpose of a waveguide is to help eliminate, at  least curtail, the spreading of sound waveforms.  In your case, my product may be redundant or have only a nominal effect.  Thank for your advice, really.  Happy listening.

That's what I thought with the waveguide.  Thanks for the clarification.

By the way Jim, you have to disclose that you are now a purveyor of these felt diffractors on your signature.  It's so that everyone reading your posts will know that you stand to gain financially by selling these.  There is nothing wrong with commercial interest -- it just needs to be disclosed up front.  As an AC steering committee member representing the poor old regular members, I have to look out for the best interest of the hoi polloi. :wink:

Good luck.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 12 Oct 2007, 01:33 pm
Geez, Wood.  What does my signature as you see it say to you?  Appreciate the feedback.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: woodsyi on 12 Oct 2007, 01:38 pm
It says, "the output should equal the input," quoted from Jim Dunlavy.  You also have a picture of your gray felt diffractor.  Nothing tells me that you sell it.  What am I missing?
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 12 Oct 2007, 01:56 pm
That's the avatar you're are referring to.  The signature line is at the bottom of the post, isn't that right?  You no see?  Please let me know.  Thanks.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: woodsyi on 12 Oct 2007, 02:04 pm
My bad.

I see it now.  Thanks.

Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: brj on 12 Oct 2007, 06:03 pm
Ok, let me take another shot at explaining a central point about the "Critic's Circles", specifically addressing this quote:

Quote
You realize Chair, you dropped a competitor right into the mix.


To address that, let me point to the following verbage from the Critic's Circle Guidelines (http://www.audiocircle.com/index.php?topic=45439.0) (which everyone went back and read prior to posting to this thread again, right? :wink:):

Quote
Comparisons against other components are inevitable and desired, but differences should be stated specifically and in the context of the reviewer's specific preferences and review environment (room/system/etc.).  We welcome comments from anyone on any review in the Critic's Circles, and this includes comments from the manufacturers, dealers or distributors of reviewed products.  All parties, however, should be respectful to all other AC members when commenting in these threads.


This is a circle for user reviews... the more products a user - any user - offers up for comparison, the better.  To recycle some points made in a PM conversation on the same topic, I'm thrilled when I learn of a product I was previously unaware of while reading a review of a product I'm already aware of.  I'm not really sure how you write a useful review without comparing against a reference of some kind, and the more similar products you compare against, the more chances the reader will have heard one of them and be able to really understand what the reviewer was trying to say.

For manufacturers that have a circle on AC, it is improper for another manufacturer to advertise in their circle.  It is also bad form for any user to recommend a competing product in a manufacturer's circle.  There is, however, a somewhat fine line between recommending a competing product and comparing against a competing product.  (And to be clear, that line is determined by the circle facilitator.)  That said, those guidelines apply to manufacturers circles... in the critic's circles, the more comparisons you make, the better!  We want to hear about other products, and everyone posting here should understand that.

A final point... please note the following line in the guidelines:

Quote
All parties, however, should be respectful to all other AC members when commenting in these threads.

Name-calling of any kind, no matter how mild one might perceive it to be, is not respectful of other AC members.  I would ask that all parties having posts hinting of this go back and please modify them accordingly.   Thank you!
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 12 Oct 2007, 07:31 pm
bjr-  This is not meant to be facetious, really, but is "turkey" a bad word?  It's not meant as inflammatory, it's meant to rib tickle.  Just so you know, I think I'm clear on everything and thank you for the massaging.  jim

(a moment later)  but, it could be perceived as disrespectful so it's outta here. 
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: ooheadsoo on 12 Oct 2007, 07:36 pm
Woodsyi, actually, with your waveguide, I would think that the felt would indeed help.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: TheChairGuy on 12 Oct 2007, 07:40 pm
bjr-  This is not meant to be facetious, really, but is "turkey" a bad word?  It's not meant as inflammatory, it's meant to rib tickle. 
(a moment later)  but, it could be perceived as disrespectful so it's outta here. 

As is the 'pig' comment in mine (now banished) :wink:  That was just ill-advised of me to write that, too, on top of everything else.

Regards, John  :thumb:
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 12 Oct 2007, 07:46 pm
Not to worry.  Just a little male bonding is what it is.  jim   
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: brj on 12 Oct 2007, 07:51 pm
Quote from: jimdgoulding
This is not meant to be facetious, really, but is "turkey" a bad word?  It's not meant as inflammatory, it's meant to rib tickle.  Just so you know, I think I'm clear on everything and thank you for the massaging.

In and of itself?  No, "turkey" (or "pig", since John was apparently typing as I was!) isn't a "bad word", at least not in my book.  The catch is that it is all in how you say it, and the Internet is definitely an imperfect means of communication.  It's one thing if you know the person well, but otherwise, you have no idea how someone will interpret what you consider a "rib tickle".  No one is going to lose sleep over it, but why risk a negative perception on such an easily avoided source of ambiguity?


Quote from: jimdgoulding
(a moment later)  but, it could be perceived as disrespectful so it's outta here.

Thank you!
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: satfrat on 12 Oct 2007, 11:10 pm

Just some preliminary thoughts.....more to follow
(http://www.audiocircle.com/gallery/albums/userpics/48289/reflection_vienna.jpg)


More to follow

mike

Hi Mike, I hope all this distraction from your review won't hinder you from a more detailed followup after you've spent more time. I ask this mainly for myself as it's gonna be a couple of weeks or so before I get my 2 pairs of squares for my 4 Lorelei's and I need some comments for ya to feed the hunger.  :drool: Seriously, I'm not sure how much better the imaging could be on my Lorelei's but I'll be finding out and any further evaluations from you will only help me know what to be expecting. So please follow thru if you would.  :D

Cheers,
Robin
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: MaxCast on 13 Oct 2007, 02:08 am
You guys need to start drinking a bit earlier in the day and lighten up  :P
Maybe someone can go back and clean up the poop. :icon_lol:
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 13 Oct 2007, 02:56 am
Ancient history, Max.. Where you been.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: brj on 13 Oct 2007, 03:13 am
Heck, he may have been referring to me... in which case, he really isn't that far off, as I'm still at work while my 3 day pass to RMAF most likely still sits in my mailbox. :(   Hopefully tomorrow... in which case - everyone keep playing nice, because I won't be checking in!  :thumb:
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: MaxCast on 13 Oct 2007, 01:47 pm
I was speaking to the thread crap and off topic posts in this review thread.
I think that'd be fair to Mike and Jim.

brj, get to RMAF now!!  :D
Title: Notes from an AC member/customer from Sept.
Post by: jimdgoulding on 13 Oct 2007, 10:49 pm
"Hello Jim:
 
Here are my comments.
 
With the felt tweeter surrounds, there is less smearing of the sound; in orchestral music, individual instruments can be heard distinctly rather than blending into an amalgam of sound. There is definitely more depth to the sound stage and more hall ambience as well. Rather than a sound stage laterally restricted about each speaker and the virtual center, the felt tweeter surrounds produce a soundstage width that is more uniform and panoramic. My preferred room curve using a 1/3 octave RTA/equalizer previously required a roll off of 1.5 db per octave between 4KHz and 10KHz to avoid a brittle treble. With the felt tweeter surrounds in place, I find the room and my ears tolerate a flat response in that frequency region. This relative frequency boost may also contribute further to the perceived improvement in the size and depth of the soundstage."


This customer uses floor standing towers crossing over to the tweeters at a higher point and, still, hears what he said above.  He asked that I not use his name if I wanted to post here.  I do and I did.  He is non conversant in spite of my efforts.  I would add that within that stage, instruments are rounder and radiate more dimensionally and space can be more tangibly appreciated.  Perhaps, this is more easily discerned in smaller works.  As to what the customer above was experiencing, I submit that this has to do with early reflection reinforcing high frequency info.  And that may be intended by this speaker designer, but, I expect, not by the recording engineer.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 28 Oct 2007, 08:51 am
Notice:  If you are returning here to post your comments about using my product, please visit a new location in Industry Talk to be added very soon if not by the time you read this.  Thank you.  Jim
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 21 Apr 2009, 05:23 am
Geez, don't think I've looked at this thread since 10/07.  Lot a water under the bridge since then.  Good times are not forgotten.     
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 25 May 2009, 05:53 pm
More recent reviews and pictures can be seen at "New! Diffractionbegone results" under Industry Talk and Events.  This is an older thread but a good thread.  Thanks.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 7 Oct 2009, 02:55 pm
Dragged these over from Audiogon to add to comments here . .

Jim made sure to get every measurement right on these tweeter surrounds.  The results are fantstic, more focus, clarity, and 3 dimensional sound allowing my speakers to completely disappear in the soundstage.  Thank You!
  Positive by  Buyer Geared4me (306) on 01-21-08  re: Accessory

Jim is an enthusiastic and communicative person with a really excellent and effective product.  His felt surrounds have become a permanent part of my system.  I recommend them highly. $49 well spent.
  Positive by  Buyer Pummy (204) on 01-18-08  re: Accessory

In addition to Jim being a responsive seller, Jim's product exceeded my expections by actually improving the imaging of my Acoustic Zen's.  This is the best $50.00 I've spent in a long time.
  Positive by  Buyer Raks (180) on 12-29-07  re: Accessory

Additional comments and info can be seen in Products Support Threads.  Happy to be of service.  Bon appetit.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 26 Oct 2009, 08:45 pm
I gotta whip this on you it's so spot on and nice.  This chap lives in Brazil and came to me upon reading the experience of another customer in an audio forum down there.  English is not his native language, obviously:

"Hi Jimmy,
 
After listening for one week the surroundings, I can say that I am very happy with this product. In fact, I can note a better focus and soundstage, with a more timbre accuracy.  It is important to point out that my listening room is acoustic treated and, as a result, I do not suffer any acoustic problems...your surroundings did not "fix" any problem in my system..it actually added more "music" to the system...
 
Some of my colleagues in Brazil did not believe on that ...they say that actually I suffer some misbalance in my system...I am trying to convince them that?s exactly the opposite....I believe on my ears.  I will keep you posted..
 
Best Regards,
 
Hernani"

The guy just strikes me as a sweet cat (nobody calls me Jimmy).  His speakers are Dynaudio Contour 2.8's.  I got this just today.
Title: Re: Dude where are my speakers!! Diffraction Felt Tweeter Surrounds WOW !!!
Post by: jimdgoulding on 31 Dec 2011, 11:26 pm
Thought I'd bump this discussion.  You might find it amusing.  I was losing my cherry on AC at the time :duh:.  It's from way back and some of the user comments are amongst my favorites.