TBH, your flogging a dead horse spending any money on the MC200 trying to improve sound.

Obviously stick with placement and file formats that pleases your hearing, but hot rodding with cables, conditioners etc should only be considered once one of the higher quality units is used, ie MS600, ID40 in 861v6/808.3 or ID41 in 818.

FWIW, it has been proven elsewhere that output of WAV and FLAC produce identical digital output after being decoded. I posted a link to this recently. Yet people still prefer WAV. The only difference can only be contamination in the audio device by the PC components. Move to non PC bases Sooloos product as listed above will remove the only variable part of the equation - once audio is out of the core ie MC200' it's in the same format irrespective of whether it started life as WAV, FLAC etc.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).