Ok. I'm done with the break in of the V5s! 10 days of painful anticipation, 150 hours of cookin. I wanted to let them burn in for more, but could not resist anymore. In fact, the changes in the sound waves reaching my ears from the headphones would make it even harder to cope with
So, I'll start with the accident! Op-amp rolling occassionally brings trouble I have no idea why. I'm gentle, still legs come off or break. This time an lme49720 leg was cut in half deep inside the Burson extension socket, which is now useless. The socket is required for the V5 to fit on the STX II, so I'll have to get a new one.
In regards to the sound, I'm not going to repeat what has already being said in terms of bass, mids, treble, soundstage, dynamics etc. I wlll simply attach "superb" next to every term I'm aware of. The rest comes down to personal preferences.
Speaking of preferences, I have to say that the V5s are not ideal for my tastes. I miss some of that liquid warm presentation I used to get from the Muses to be honest. It has less coloration (I'm sure it pairs better with HD650 than HD600) and perhaps very slightly dryer stance. Coincidentally, the instrument/vocal placement is exactly the same to my previous op amp configuration (Muses8920+Muses8820(swap kit)+lme49720). Mid-distance is perfect for 50% of the recordings, some others are just "ok" with that while a great deal of them sounds just awful. Sadly, this is the case with SS V5 as well, the sense of compressed tone hasn't changed at all. The lack of fatigue helps to crank up the volume a bit but this does not solve the issue, it simply doesn't fill your ears.
Therefore, it would be great if Burson Audio decides to deliver such an alternative: A closer sounding V6!!
PS. The MK2 now serves as the mandatory and wonderful finishing touch on a well-made cake. It adds all of those little things the upgraded STX II can't.
PS1. Throw onto the ring any sub 1K DAC against the "supremed" STX II. It's going to be an interesting fight I'm sure!
PS2. Default STX II should be considered by no means an "audiophile" piece of gear. It needs lots of corrections and improvements from up down to the bottom. We can't ask for much from a 200 Euros device though. It will serve as a solid base to start building upon. The end result after having spent a total of 1000 Euros excluding the headphones, to my ears it feels really high-end now and I can live with it for many years to come. The signal is powerful enough to feed more demanding headphones without question.
I'll come back for any further changes/improvements I may notice in the future. Stay tuned.