Rogue Metis speaker polirity

You were told wrong information. The only time you would reverse polarity is when something is recorded out of phase and it bothers you enough to correct it. BTW, many can't even hear the difference. Leave it alone and enjoy it!

Ask Rogue. They are quick to assist. Cheers,
Spencer

I found a couple of reviews and neither one mentions that the preamp inverts phase.  If it did, I'm sure the reviewers would have said.  There are some preamps that do indeed invert phase, but I don't think this is one of them.

https://www.hifiplus.com/articles/rogue-audio-metis-preamplifier/

http://www.soundstage.com/revequip/rogueaudio_metis.htm

( The Rogue Metis definitely Inverts)
 Flip both speaker leads at the speakers

 Best JohnnyR
 Audio Connection