D220 pro CI vs D440 pro CI

[sam1000]

I need some advice on D220 pro vs D440 pro. I listen only to digital music (Tidal) from my old mac laptop to USB to D220 pro to Dynaudio confidence C1 bookshelf speakers (4 ohms impedance) (in a very small room 10 ft x 11 ft x 8 ft high). I think the sound quality of my system can be improved but I don't know which is my weakest link. Devialet suggests that I get another D220 pro and make it D440 pro. For that price, I could get a much better speakers or at least ones with less impedance. How about adding a better clock between Mac and D220.

I would appreciate any advice.

thanks

I'm not certain if better clock would help. I think Devialet implemented a better clock during 200->220 upgrade.  (I have tried Mutec Ref-10 along with MC3+ USB and then simplified my setup.) My preference would be
1. If you have not already done so, upgrade power cable to something like Audioquest Z3 or Shunyata Delta
2. Upgrade Source - NUC computer, Roon Nucleus etc.
3. Get new speakers
4. If you think your existing speakers are power hungry, then get second 220 (However, your room is relatively small, 220 should be able to drive those speakers in that room)