Maybe it's my ears, or lateness of the hour during past listening sessions, but I think my stereo Phantom Premier Classic 103dB rig sounds sweeter after a couple of hours of playback. Perhaps it's their hybrid classic A/B amplification.
2 Channel Power / Signal Path: APC H15 → Mistral Audio W-3900 → Custom Roon Server → Silent Angel Bonn N8 → Silent Angel Forester F1 → miniDSP SHD Studio → Mutec MC-3+ USB → Devialet Phantom I 108dB
Headphone iFi Audio iDSD Signature → Grado GS1000i
Headphone iFi Audio iDSD Signature → Grado GS1000i