Jeff07971 wrote:
> Baluns create a "nomal balanced" line to/from an unbalanced or balanced
> signals
> plus they are totally isolated which helps avoid hum loops.
Not all baluns provide isolation. Only the transformer-based ones do,
and transformers are often problematic from a sound quality point of
view.
An unbalanced input can drive a balanced connection without no special
conversions - the important part is the differential input at the
receiving end.
> BTW balanced line are generally LOW impeadance (600 ohms + to -, 300ohms
> to ground) to help noise immunity
I agree - and that is what I was implying. Transformers provide an
impedance conversion, so that an (originally) high-impedance signal can
be transmitted over a low-impedance connection.
Back in the day the opposite solution - using a high voltage connection
("100V line") - was also popular for longer runs in a building.
"To try to judge the real from the false will always be hard. In this
fast-growing art of 'high fidelity' the quackery will bear a solid gilt
edge that will fool many people" - Paul W Klipsch, 1953
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