I’m slightly fuzzy on the DR vs non-DR topic when it comes to upgraded power supplies. Specifically, I was wondering: if you were to use a NAPSC to power the pre, is there any benefit to having a DR amp??
But more generally, I was reading the DR section on the website below and it seems to indicate that there are amp benefits as well…
I’ll let others explain the whole DR part (I can’t …), but the NAPSC just powers the logical/digital circuits for input switching, so is different from the larger power supplies like the HiCap, which power the preamp as such.
The DR in power supplies for streamers (or other sources) benefits the streamer.
The DR in dedicated power supplies for preamps benefits the preamp.
In power amps there is one complication.
In most power amps (NAP 250, 300, 500), the DR benefits the power amp itself
However, the NAP 200 is the only power amp that can optionally power a preamp (instead of having a dedicated power supply for the preamp). This works with the NAC 202 or NAC 282. In this case, the DR in the NAP 200 benefits the power supply for the preamp, and not the NAP 200 itself.
(With the NAC 202, the NAPSC is optional but very recommended. With the NAC 282, the NAPSC is required. In either case, it powers only the digital input switching and lights, so an additional power supply is necessary - either a dedicated one or from the NAP 200. The NAC 252 and 552 don’t need a NAPSC)
There is no question that interference can exist. My main contention was with “you never want analog and digital in one box” as an absolute statement. There are tradeoffs to every decision, and just because a SuperUniti has them in one box doesn’t make it automatically a worse choice than another model that uses different trade-offs. If the unqualified statement was true, NDX2 and ND555 would be non-starters, as would of course be all Unitis and the 272. Yet many people are happy with those, so “why would you ever want it in one box” cannot be unqualified true.
My other contention was that using the “noise” incantation without a deeper understanding of the actual technical issues is like a cargo cult. Noise interference has real consequences in some contexts but not in others