[matt thomas]

I was recently converted to the school who knows that absolute polarity makes a difference. I made a saw tooth wave and flipped its polarity every second or so, there was an obvious difference.

but I'm with ethan, I think its at least mostly down to speakers not reacting equally in either direction

I also think it will only be apparent for certain shaped waveforms (the sawtooth in my test was obviously an extreme example), and how apparent it is will depend on the speakers of the listener.

narco