IainO
24
That was covered on the threads when NC was released.
naim rated 300 above XPSDR, there are various tech posts on why NPX300 has advantages, and then Steve S chips in…
The term was a “touch”, not “much” 
But technically a 555PSDR is still the ultimate PSU - sure I could dig out a forum link if pushed.
However, the PSU “hierarchy” comes with a massive caveat in terms of how NC was developed…
There are forum members very happy with 555PSDR on 222 though.
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