Phase inverting preamps


Apologies in advance for this newbie question. I was reading some reviews of preamps and a couple said that the preamp "inverts phasing" and that this would have to be accounted for elsewhere in the system. I know what phasing means, but how and where does one allow for it elsewhere in the system?
4yanx
@herman 
I understand what you're saying. I meant a spacial domain. Waves can be modeled quite nicely with no time considerations. 
I couldn’t read this post- But- the answer is simple. Reverse the speaker cables to your speakers.  Simple and easy. By the way when you become a serious listener you will buy a preamp with a “ phase inversion” switch.