So I hooked it up to a top audio system to see what sort of source it was both dig and line. Dig out is vg though the player still wasn’t as good as a Naim Core as player but still excellent. (A top 3k dedicated server/player) Tried the supplied cable 1st and it was good but once I switched to a Naim DC1 cable with 3.5 adapter, it really fell into place and became a great source and better than most dedicated home devices. This was unexpected when using an adapter and an extra 3 feet of cable but it worked really well.
Line out was OK, not great, but there's a catch. The 3.5mm headphone out sounded great as a line out. I suspect the line out has either a high output impedance or simply lacks enough current. This was playing into a 20k input impedance. Mid gain clearly the best here. Filter 5. Do not be fooled by worrying about double amping here and think of it as a buffer amp that often help systems perform better. It is still putting out less than 3v at full tilt in medium Gain.
This is a very revealing system that I don't personally own but know extremely well. All Naim, NAC S1 Pre, Nap 500 amp, ND 555 streamer as DAC and Uniti Core as server/player, all on Fraim. ProAc K6 signature speakers. The Dx240 did not sound out of place here though I could beat it when I optimized paths.
This thing is a little wonder. Remarkable performance. Good enough to hear what's going on and optimize to get your ducks in a row. If amp8 mk2 improves this thing, Holy #$@&!