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RE: From what I understand the Zero's...

"I don't understand your phase "Iron Core". There is no iron in the Zero's, just copper."

Ah. I was assuming they were wound on iron cores. isn't that the case? I found a review somewhere, and it said

"...a pair of massive toroid transformers, that remind me of what you'd see as power trannies in a 250 wpc solid state bruiser. These have a biwired pair of black and white 14 gauge silver plated copper leads for your speaker connection, and on the other end you have have 4 wires, color coded gray, yellow, blue, and brown. These are your multiple impedance taps."

I was guessing the toroid cores were iron. Is that not the case?


BTW my phrase "iron-cored components" was a quote from one of the early articles presenting an OTL design, by Dickie and Mackovski in 1954.

Edits: 05/06/17

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