I was going to chide "Dr. Power", who seems hell-bent on putting all his speakers in parallel and burning out his amplifiers, until it occurred to me: I don't really know what happens when one puts two or more amplifiers in parallel with each other.
This ASS-U-MEs, of course, that the amplifiers are designed for this usage (bridge-able, I guess you could say). And to reduce confusion in this discussion, let's limit this to transistor amplifiers without output transformers (in other words, 99% of amps found today).
What happens to the total impedance when amplifiers are put in parallel? Both from the point of view of the amplifiers and their loads (i.e., loudspeakers). Do the impedances reduce the same way resistances in parallel do?
In other words, could "Dr. Power" actually get away with, say, putting 10 LM3886s in parallel and running 10 4-ohm speakers also in parallel, for a total load of 0.4Ω, as per the title of this thread?
Or is he just going to produce a lot of expensive smoke this way? (My money would be on this outcome.)
Inquiring minds want to know ...