|Author:||JeffW (registered user: 1648 posts )|
|Date:||Fri, Jun 22nd, 2012 @ 21:40 ( . )|
Seems like the lower impedance part of the secondary say 4ohm is using less of the whole winding then that part which over laps with the part of the 8ohm would be in parallel and the remaining winding would be in series with the parallel parts. So the 4ohm speaker is sharing it's winding with half of the 8ohm load which makes 2ohms on the 4ohm winding giving half the reflected impedance then the other half of the 8ohm load would be reflecting the proper amount for the other half? I guess that comes out to about 3/4 the proper reflected impedance. My brain hurts:)
I doubt you would hurt anything by doing it. I built a dummy load center several years back and used it for over a year before it occurred tome that I never tested it. I had labeled it backwards and the 4 was the 16 and visa versa! It never hurt an amp and I also built some nice sounding prototypes with it:) Tubes and transformers are basically tough until the extremes are reached. Not to say that being willy nilly is good!
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