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In the Forum: Audio Discussions
In the Thread: RMAF 2008 observations, opinions 1) ceramic drivers
Post Subject: He might be surprised to hear such a difference . . .Posted by cdwitmer on: 10/19/2008
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 Romy the Cat wrote:

Yesterday, I spoke to a very knowledgeable guy who is working with theories and practice of magnetic cores for 40 years and asked him about any possible benefits of making whole magnetic pathways from Permendur. He was laughing and suggested that it is a complete waste of money and material . . . I wish someone would stop to talk nonsense and start to talk about the Sound of these things…

The Cat


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 . . .

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, and 2) it has been a full year since I have listened to any Feastrex speaker and I am in fact not at all familiar with the sound of the most recent products. But the sonic difference between the Type II field coil drivers and the Type III field coil drivers is not insignificant.

-- Chris Witmer

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