Rerurn to Romy the Cat's Site


In the Forum: Horn-Loaded Speakers
In the Thread: Vitavox’s S2 Survival Guide.
Post Subject: Buddanization and again: about the S2's diaphragms.Posted by Romy the Cat on: 6/5/2007

This post is split form the thread:

http://www.GoodSoundClub.com/TreeItem.aspx?PostID=4549

http://www.GoodSoundClub.com/TreeItem.aspx?PostID=4556

 jessie.dazzle wrote:
"...I very much might try to use the metal suspension again when I will be driving the MF with a single-stage Milq, direct coupled or after I try the Duddanization of the cone. The single-stage Milq should be “a cleaner electronics” and it should be advantageous...."
What do you mean by "the Duddanization of the cone"... I would guess you are referring to damping the cone via some sort of coating (saliva from your pregnant adolescent camel... You do realize she has been pregnant for a very long time...)

Ah, the beautiful of me! I in my usual manner misspelled the Duddanization. It should have “B” as a first letter as should be read as Buddanization. The Buddanization is a Romyinism coming from applying to a driver the Bud Purvine’s EnABL Patterns:

http://www.goodsoundclub.com/pdf/EnABL%20White%20Paper.pdf

 jessie.dazzle wrote:
"...Since you already do have the S2 driver then buy from Mike one single plastic suspension cone and try it next you original cones..."
My S2s have metal diaphragms... In fact, I did not realize that it was still possible to buy the diaphragms with plastic suspension (???).
Thank you for your offer to lend me a diaphragm... It would seem best that I try to buy the diaphragms that I don't have (plastic suspension)... If I heard the plastic suspension in my system, and liked it, but then could not buy a pair, I might just become and Audio Psycho...

Yes, Mike’s cone are high available. I have written a lot about the contemporary vs. original S2 cones, look for the legacy posts. To recap everything very briefly…

The biggest problem in that debate that the plastic and metals cones should be used in different channels and with different horns. The plastic suspended diaphragms are for 400Hz horns and for 800-1000Hz of crossover point. The metal suspension diaphragms has no stupid secondary resonance at 1250Hz and therefore then could be used all the way down to 500Hz in 250Hz horn. The metal suspension diaphragm has 2dB more sensitively above 3.8K and run deeper to HF. It is faster, has richer lower marriage but it has the transient noise at very high end. Going for horn of lower horn rate make the horn deeper and slightly attenuates the metal suspension nastiness but not completely. As the result the S2 with metal suspension will have equally present everywhere very idiosyncratic HF colorations. Those coloration are very attractive but there are no what I agree to have. I delft in many different ways with the metal suspension’s colorations: aquaplas, table tennis glue, back side Photospray, back chamber damping, electrical dumping… It is all work in one way or other… I also sometimes heard quite clean sound from the metal suspended S2.
So, in the end I have chose to use the plastic suspension because it is way less problematic (in 400Hz horn with 3.8kHz electrical/1000Hz acoustic filter) but I do keep my options returning to metal suspension opened.

Rgs,
Romy the Cat

Rerurn to Romy the Cat's Site