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Autoformer vs Speaker impedance Curve

Autoformers vs speakers with wild impedance curve swings (for instance; MC601 amp paired with B&W 802D3 speakers).

There’s a wealth of information about tube amp audio transformers interaction with speaker impedance, but I can’t find anything regarding Autoformer and speaker impedance/phase curve relationships. 

Can any techies enlighten me? 

Thanks!

(I tacked a similar post onto the end of a 10 year old thread but thought I might get a few more hits with a new thread.  Sorry for the redundancy)



73max

Showing 1 response by recluse

recluse
270 posts
 
I am enjoying the debate among experts, but am still not understanding how an autoformer works. The last question from the OP was a good one.  I Think including ss adds to the confusion and would prefer explanations stick to tube amplifiers where they are more practical.

How does an autoformer work? Does the speaker cable mate with the windings? How is the signal changed at this point?
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