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In the Forum: Audio Discussions
In the Thread: RMAF 2008 observations, opinions 1) ceramic drivers
Post Subject: Who is the main yoke?Posted by Romy the Cat on: 10/19/2008
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 cdwitmer wrote:
If Very Knowledgeable Guy ever had an opportunity to do a listening comparison between a Feastrex Type II field coil driver, which has a Fe main yoke with a Fe49–Co49–V2 pole piece and a Fe49–Co49–V2 top plate, and a Feastrex Type III field coil driver, which has yoke, pole piece and top plate all made of Fe49–Co49–V2, he would no longer be laughing. He might recoil at the price, but his ears would not be telling him that there is no significant difference. There is a significant, very audible difference in the sound between the two drivers even though the only significant physical difference is the use of all-Permendur in one and Permendur plus Iron in the other . . .

Well, I do not think that he has this experience, nether I do, not many other people. If you do then could you elaborate on the difference when the main yoke is made with and without Permendur?  Would it be the need to make the main yoke from Permendur of would it be the need to make main yoke, pole pieces, the back and forward ways and the field-coil core from the SAME material? Also, if the Feastrex people are the ONLY people who are in position to make this decision then why qualification then have to make those judgment?  Who the hell know what Feastrex think or know about sound and what this objectives are. To me the entire idea to go into faster core with objective to get faster transient at HF is an absurd. What better HF – use a dedicated tweeter. To make a heavy cone that produces 100Hz to push 12kHz it ridicules. What max excursion of Feastrex? Most likely it is ½ of wavelength at 12kHz. Here is where the “perfect timing of full-rage driver goes…

 cdwitmer wrote:
It would be irresponsible of me to attempt a detailed discussion of the sound because 1) I am not a well trained listener and analyst of audio…

Chris, with all due respect - don’t not you think that this reply sounds at least stupid?

The Cat

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