In article , uson
wrote:

Other than buying a preamp with such a switch, it would seem a
relatively easy device to design. Needs to be completely inaudible, and
avoid switching "pops". My ears are very sensitive to correct polarity
(in some recordings) but my pre-amp does not have a switch, and its a
royal pain to reverse the speaker leads.


--

Why not put a reversing switch in the speaker leads?

Isaac


--