I can tell you right off that the balanced out on the stock amp sounds pretty much identical to the m11 with a good source.
I'm sure it will be even a bit better with USB connection. Getting ready to try bluetooth and am3d. Very nice so far. Oh, and did try the SE quickly and balanced is much better as expected.
Tried the am3d and while it's not night and day from the stock am3e which is excellent in it's own right...But, the am3d seems to be more exacting and have more control over pretty much everything. The sound stage is huge with this module, very expansive and the treble seems a bit more elevated from the sock module.
It sounds extremely clear and more source dependent. This is going to reveal bad sources more, and it seems like it's more powerful. It's hard no to be impressed with the stage and positioning. Oh after trying some faves yeah the thx module is really impressive, timing is awesome and the attack and decay on percussion is right on making stuff sound really natural and realistic- especially with well mastered stuff.
sub bass hits hard too. Great dynamics. Only problem I see is it's pretty neutral and revealing and on my crappy recordings ouch! The stock module like the m11 smooths them over a bit. I can probably solve that with some eq ing. M11 is pretty revealing itself but not as exacting. Maybe the module will 'smooth' out after some hours. That burn in thing.
Man, Steely Dan's Aja sounds like I'm in the studio with them. A really nicely mastered recording there. I'm creaming over the sound of the Fender Rhodes
Ok tried bluetooth and it worked flawlessly and sounded amazing. Although the light was purple with all the devices I tried and they were transmitting ldac which according to the quick start should be green?- skip that ldac is white which is like a lavender, I read LHDC as LDAC aptx is purple which is darker so all is well.
Have to find out how to check the battery.
Stock module is wonderful, no problems with the sound at all.
Oh and the build of the unit and modules is impeccable. The screws came out nice and everything fits very flush. They even had a little rubber cover for the board contacts on the amp module. Pairing it with baby m6.