Archived from groups: rec.audio.tech (More info?)

What is a good source for a beginner dealing with 25V/70V
high impedence sound systems??

Archived from groups: rec.audio.tech (More info?)

mathedman wrote:
 
>  What is a good source for a beginner dealing with 25V/70V
> high impedence sound systems??
 
Oh it's you again !
 
I see you're as clueless as ever.
 
I'm familiar with ' 70V line ' ( popular in USA ) and ' 100V line ' (
popular in UK and elsewhere ) but never seen 25V suggested as a
distribution method.
 
It's a way of connecting multiple speakers to a single amplifer that
allows ( by use of a tapped transformer ) each speaker to be set to a
sensible outout level to cover its intended area. It also tends to
require smaller gauge wire than 8 ohm working.
 
It can be found ( for example ) in lo-fi railway station announcement
sytems.
 
So what do you *really* want to knw ?
 
Have you considered buying a book on audio instead of posting assinine
questions here ?
 
 
Graham