yes the bolder analog mod removes the analog op-amp which effectively reverses the phase of the unit. thus they recommend rolling back to firmware 15 which as i see it can't be done on a mac. as for whether or not you can hear it is up for some debate i guess. wayne from bolder said he can easily tell when his speakers are out of phase, i know others have a much harder time (hence the need for hundreds of dollars gadgets to tell you whether or not your in phase or not). there also appears to be a cult following for firmware 15, who seem to believe it sounds better, but there's already one psychoaccoustics thread started somewhere and i don't want to start another...
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