A good friend considers MBL Radialstrahler 126, Netzwerkplayer C41, Stereo-Endstufe C21.
Streaming Qobuz for music.
So far so good.
But this system also has dutys as home cinema. Streaming Netflix, streaming movies. No DVD, no Blueray.
Your friend needs a preamplifier with a home theatre bypass. The c41 doesn’t have this as a facility. MbL do a preamplifier with this option and they would then need a multichannel power amp and a home cinema processor for rear channels or side channels