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In Reply to: RE: long cables posted by b.l.zeebub on November 05, 2010 at 05:21:34
Many thanks for your reply.
Aikido preamps (http://www.tubecad.com/Nine-Pin_Aikido_PCB.pdf) are, usually, SRPP stages with signal output not balanced.
Do you think that a solution as that proposed by Bill could work properly?
I would like to avoid a further stage only to transform the signal into a balanced one.
Follow Ups:
I think that with 50m between source and speakers balanced lines are the only sensible option short of redesigning the entire system (and every piece of equipment within it) from voltage transfer to current transfer principles with the precise impedance matching necessary for that to work correctly.
Balanced lines also run just under 12dB hotter which helps.
What do you mean with "...from voltage transfer to current transfer principles" ?
That's how the old valve-powered telephone exchanges and trans-atlantic telegraph lines were designed. You'd need a lot of expensive transformers and every input and output has to terminated to exactly 600Ohm.
It is not a feasible option, I was being facetious.
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