$485 for wooden knobs? 
Who would buy into such rubbish? 
I presume that the "science" behind the sonic improvement claims for these knobs is that compared with the vendor's bakelite knobs or more common metal knobs, these wooden knobs have lower mass and higher internal damping. Theoretically, one supposes that these traits could reduce the internal vibrations (caused by the music being played) of the potentiometer behind the knob, and that reducing such vibration could improve the sound quality.
Based on this analysis, a styrofoam knob with a lead spindle and rubber coating would be even better, but that would probably cost too much!
The explanation, beyond its implausibility, begs the question of why use a pot that is so susceptible to such miniscule vibrations. I have reasonable background in vibration analysis, not much in electronics beyond an undergraduate EE breadth class, and it sounds like a bunch of hooey and/or patching a bad design to me.
(Just trying to imagine some science behind the bologna, not endorsing the concept.)
-MK
