Help with inverted phase Newbie Question

If your preamp inverts phase on all inputs (some invert just phono, some invert just the line stage and some invert both), the easy fix is to swap the speaker leads (instead of red to + and black to -, connect red to - and black to + on BOTH speakers. Voila, your system no longer inverts phase. You should note improved soundstaging and bass, except on recordings which are phase-inverted.

Alrau1: If both my preamp and CDP have phase inverted, do I need to swap the speakers leads? The reason to invert the phase from my preamp is that it could reduce the hum from my system quite a bit. Thanks.

If you invert twice, you are in phase. Inverted phase is 180 degrees out of phase. Invert again, you are 360 degrees out of phase, which is really 0 degrees out of phase, which means you aren't out of phase. If that makes sense.

Edesilva's response was right on the money, so the answer is no. But, where did you get the idea that inverting phase reduces hum?