Techinics Sp-10 Mk2a break-in period

I would have to think that there definitely IS a break-in period for an entirely new tt bearing system, of most types. This would vary according to the nature of the bearing (there are many types) and the materials used in the bearing system, including the thrust pad (ditto). What you might hear during break-in is slightly more noise than what will be the eventual norm. Most likely, the variance will be from "no noise" to "even less noise". So, forgeddaboudit.

Norm, Here's the thing:  The lamp cord, as I recall, is/was hard soldered to the PS.  Then when you ditched that you or someone else installed an IEC connector, to which you plugged in the Nordost PC.  In all my audio experience, NO connector has always sounded better than ANY connector, no matter how wonderful and Furutechian it may be.  Thus, if one were to posit that the PC makes a difference, the IEC connector might swamp out any such difference.  Here's where I admit that I hard-wired a length of XLO power cord (which happens to be my favorite) directly into the PS of my SP10 Mk3 and hear...... no difference.  But I felt oh so much better.

However, to my surprise, PCs to power the bias supply did make a difference to the sound of my Sound Lab ESLs.  Go figure.  In that capacity, current carrying capacity of the PC is moot; the bias supply requires very little current.  I generally think that sonic differences among PCs are 90% due to current carrying capacity, thicker is better.  But there are obviously other factors.