FYI, Reverse "polarity" on a recording is not the same as the preamp being out of phase. The same that flipping an AC plug reverses the AC polarity, but the preamp is still out of phase. These terms get confused a lot.
The speaker cables must be flipped on Blue Circle preamps also.
A Motif preamp I have in my home office system has the Moving Coil phono stage out of phase. (Same added noise issue if another ciruit is added to bring it in phase.) I need to reverse the polarity on the wires going to the phono cartridge to get it in phase.