Preamp inverts signal.

Al, your tech info is always appreciated.

My pre inverts phase,   I just invert the speaker polarity.  Although my DAC can invert phase I want the phase correct with all sources.  

oddiofyl, that makes a lot of sense. Anyway can't one reverse the polarity at the amp instead of the speakers, same thing right?

folkfreak -

if inverting makes 99% better, and CDs have a mix of polarity, how is that possible?

My Sony HAP server supposedly inverts and I always wonder about swapping leads, but if so many recordings are inverted, it's a random thing, no? 

Fact is CDs do not have a mix of polarity, the vast majority are inverted. Lots of coverage of this online, the link below is to one of the most well known sites.  Changing polarity on my Paganini is a pain so I set it inverted for the majority, I try not to use the polarity change switch on the amp if I can as as another commentor pointed out it does change the active circuit. Just occasionally I find an LP that benefits however, for example yesterday on the "Breaking Glass" S/T (no great recording but inverting really helped)
http://www.absolutepolarity.com/