Sorry for this dull question but I remember I once read on this forum that changing some old capacitors for better new ones could increase the overall quality of the audio signal.
I've also bookmarked a french article about the impact of passive components on sound :
http://www.petoindominique.fr/php/audiophile1.phpAbout Jean Higara (in english) :
http://www.jean-hiraga.com/uk/legende.htmOf course this article is aiming the audiophile community (Hi-Fi) but I wonder if we could adapt their advice to improve our beloved P6.
I don't have a clear (not to say any) idea of the complete audio signal path in the Polysix and which components are involved in this process.
The question is definitley dull : I don't even know if those improvements would be noticeable for "normal" ears.