Have you heard something better that makes you think the three all sounding the same is a problem?
based on my experiences with various digital sources in recent years multiple good quality digital sources going through the same DAC and system may very well all sound similar. That’s not a bad thing in off itself. Only if that sound you are getting is deficient to you in some way.
Its not uncommon I have found for an inferior digital source like a low res internet station or stream to sound worse than other sources that are CD quality or even reasonably close for some lesser recordings.
based on my experiences with various digital sources in recent years multiple good quality digital sources going through the same DAC and system may very well all sound similar. That’s not a bad thing in off itself. Only if that sound you are getting is deficient to you in some way.
Its not uncommon I have found for an inferior digital source like a low res internet station or stream to sound worse than other sources that are CD quality or even reasonably close for some lesser recordings.