I had a PF-R as well and it was difficult to hear a phase polarity difference but I ran it with the speaker cables reversed at the amp end. Just make sure polarity is the same for both channels - you can easily hear that difference.
Interestingly, I've read that some recordings have reversed polarity so I wouldn't lose any sleep over it. Whatever sounds better.
Interestingly, I've read that some recordings have reversed polarity so I wouldn't lose any sleep over it. Whatever sounds better.