phase control on BAT VK pre amps

" I own a number of recording(CDs and vinyls) that I have marked for reverse phase playback."

If you can hear the differences, why mark them? Are you sure you're not dealing with psycho acoustics here? It seems likely that you wouldn't know the difference if the albums weren't pre marked for you.

Same reason I have some vinyls marked as to optimum tone arm height/VTA: I only have to reverse the phase of a recording once, to determine whether it's worth reversing or not. I may not remember the best phase, if I don't play that recording again, for 6 months, a year....

So basically if you don't have a phase switch on your preamp like I do on the BAT you may never know the difference anyway and are confined to listen to whichever way the recording was produced because there's no other way to switch phase other than swapping polarity on your speaker cables!? I'll just keep the phase switch on so I can see pretty blue light :-)

Mr L: Both my CDP(a BAT) & phono stage have phase switches.
You are correct; in that if one has no other means,
reversing the leads to one's speakers would be the option.
BTW: When that LED is lit; it means your phase is inverted.
Obviously; Misters Bednarski and Khomenko(et al) regard phase
accuracy as something to be addressed. They DO seem to know
something about music reproduction!