I also have (a) dedicated line(s) and own the Stellar P3. At first, I connected only sources and LPS’s into it (a Naim ND5 XS2, Naim HiCap DR, DSpeaker Anti-Mode Dual Core 2.0, Clearaudio Concept TT and linear power supplies for powering the streamer, bass management, TT and my Chord Qutest DAC).
It didn’t seem to break a sweat, so I added a Topaz 500vA Isolated Transformer and a B&K 1604A into it. Again, blue lights and not much extra draw. So finally I tested the waters and tried adding my Naim SuperNait 2 to the last available outlet. That was nine months ago and I have yet to have it even go orange for a period; and I listen to music at pretty average to above average volumes on the Integrated’s dial. Each bank is on REGEN mode as well, which shocks me somewhat.
It paid for me to try both ways and see, so to speak. I’m glad I did, as if you can get away with it, the benefits are not subtle at all. This is the longest I’ve left my system alone based upon its own merits for as long as I can remember; I have absolutely no itch to upgrade or try something else out, whether that means switching a component or adding to the system to see if it benefits. That last experiment really put things right sound-wise. It is as balanced as I’ve had it, even going from memory against some pretty insane (for me) other systems I’ve owned (price- or design-wise). The bass foundation, dead silence and utter holography when the recording calls for it is staggering.
Just try to see if your P3 can handle to BKH. I honestly didn’t think it could even handle the SuperNait 2 but it has without issue. I was afraid it would constrict the sound and lose dynamics as it has been suggested, but boy is that not the case at all. Let us know how it goes.