SavoryTruffle
New Head-Fier
Blessing 2 is not a very easy IEM to run for sure, and the tuning is Harman natural, which is not dead flat neutral like one of those ER4. As you seemed a bit treble sensitive from the EQ settings, which a notable reviewer Crinacle also mentioned about the same point about the treble about B2, so he came up with his personal target curse which sets few decibels lower on the treble range, and made sub-200hz range bit slammer, and called it Blessing 2 Dusk model. That might have been your pick.
As you mentioned the guitar sounded off to you, it could possibly mean your personal pinna gain is around 3kHz, vs the original blessing 2 set it as 2.5k Hz. Although FiiO BTR5 only comes with 2k and 4khz EQ lever, you may adjust both by a few dBs and you may get better mid-range presentations to fit with your own HRTF. If you ever consider an upgrade, Softears RSV does handle this 3k peak just like Blessing 2 Dusk, and it does it better way.
I believe it was either you or Pheonix Song that recommended the Dusk model to me a couple of weeks ago. I was going to wait to make this post until I got a chance to spend some time trying slightly different EQ settings with different subgenres. But I figure part of what I was going to say is relevant here: shipping time is half the reason why I chose to go with the original version. The other half is confidence that I would be able to return it if I wasn't satisfied. If the Dusk had wider availability, I would've gotten it instead. You and Misery both noted that the EQ settings changes I mentioned are very similar to the Dusk: that's because I copied them directly from the above chart and slightly modified by ear from there.
I'm a bit worried that the Fiio Control app now refuses to connect to my BTR5 no matter how many reconnect/reinstall/etc I do though. The device itself is still working just fine (including EQ settings) but it doesn't seem like you can manage EQ through the device. Not sure what the problem is and there's no way to diagnose.