Class A, A/B vs Class D amp Soundstage

Good evening. 
i just upgraded my Cambridge 850R Class A/B to Cambridge EVO 150 Class D with integrated streamer. I use B&W Diamond II with good cables and interconnects. So, there isn’t really a weak link in my system to be uncovered or exposed when going to a. Class D amp. 
There actually is nothing I changed other than the amps

I lost all front to back soundstage. I lost 50% of my right to left soundstage (speaker position has not changed at all and is 6 ft from the back wall. 
I stream hi-res from Qobuz.  The mid-range sounds a tad bit muffled. The base drivers distort and lower top power than my other amp which remained tight in the base even at ear hurting volume. 
 

The only and I mean only thing I did was change amps. So, I am wondering, does going from a class a/b to a class d amp cause a significant decrease in soundstage?  So far, whatever it is, I don’t like it at all, not one kilo-bit