Yes my QS pre is reversed phase and my dac is switched, so....everything is in phase. My source is out of phase, the signal goes to the pre which has switched phased, so now the phase is IN, it leaves my pre and goes to my amps and the speaks IN phase. If I couldnt tell when my speakers were out of phase, I would have no business listening to music.
The issue is not about phase, at all, in any way whatsoever. Infact there is no issue, it was a statement I heard in an youtube video about switching speakers. Nothing at all to do with polarity or phase.