In Reply to: Now that you mention it... posted by Presto on March 15, 2012 at 11:57:48:
These usually use a dual tap transformer and a switch. The other way is to actually have a curent limiting circuit employed on the signal - it keeps the rail voltages the same but limits the signal voltage swings. Realy cheap.
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Follow Ups
- RE: Most the time... lower rail voltage. - BigguyinATL 06:46:09 03/16/12 (0)