Preamp inverts signal.

Better still listen with and without and decide what sounds best. In my system with a DCS player and non inverting amps 99% of CDs sound better inverted so I leave my CD player set that way. The vast majority of LPs however sound best non inverted but I always check and where needed can switch from the amp.

Tell tales for an inverted recording is often recessed bass and thin mid range and when you switch you can tell straight away which way is better. Many recordings however have a mix of polarities so there's no real difference. Net net try it both ways. You will find lots of discussion n this topic elsewhere on this site

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/