Putting AC thru it would be odd.
Phase would change on output.
(
Tahkcalb ω∞ for sigs,
Wed 27 Jan 2010, 23:03,
archived)
it would have to be AC, or it wouldn't do very much at all.
you could also introduce LC filters in the middle, for lols, to get a transformer whose ratio depends on the frequency.
(
Moon Girl Technologies horrendous beanbag,
Wed 27 Jan 2010, 23:05,
archived)
non issue
it's balanced just switch over the connections
(
lord bofingham,
Wed 27 Jan 2010, 23:06,
archived)