As the others have suggested you can switch your speaker leads. Most people cannot readily hear a difference, and that may be in part a difference in sensitivity to absolute phase of individual listeners and differences in sytem composition, and differences in the recording itself. I have a Levinson No. 32 linestage that allows for phase inversion by remote control. On my system, the differences with most recordings is minimal, and where there are differences, such might be equivocal (e.g.,in one phase setting the vocalist sounds more present and realistic, but the piano sounds phasey, and in the other setting the piano sounds better, but vocals suffer). For the most part, I really do not bother with phase. When the Levinson is used in my friend's system, the differences are much more obvious. I've loaned the Levinson to this person. We both prefer a tube linestage that he has for overall sound, but, he says he often switches back to the Levinson, primarily because of the ease of phase reversal.
As for preferred phase in this friend's system, it varies from recording to recording. So, unless one has an easy way to make a comparison (remote controlled switching) and an easy way to make the switch, I think it is not worth worrying about absolute phase.
Consider too, that some sources invert phase and some amps invert phase, it is not easy to determine what is the absolute phase of the overall system (it may vary by source). So, I would do as the others suggest and switch the speaker leads just to see if, overall, one way works better than the other for you. Don't be surprised if there is no apparent difference.