I was doing my initial listening on my FiR Radon6 (26 Ohms, but very efficient. About to check out my EE EVO's on it at 4Ohms. I appreciate you guys lowering the noise floor and output impedance even further on the 4.4 connection for such low impedance units)!
Definitely a step-up from the BTR7, but there's totally nothing wrong with the BTR7.
I would just say to anyone thinking about upgrading, don't rush, but do it. Sell your BTR7 at a super nice price and help someone else get in the game (if you can afford to upgrade in such a situation). If you don't have a BTR7, then what are you waiting for
As for the LDAC, I'm using a Samsung Galaxy S23 Ultra 1TB. Upon initial pairing you have to go to:
Connections > Bluetooth > *PAIR* > *Choose the BTR17's Settings Cog-Wheel* > "CODECS" swipe to enable LDAC
After doing this, it should default to LDAC, however the instability is in NOT un-checking the other "lesser" Codecs in the Fiio Control App. It kept wanting to choose SBC (Samsung's default Bluetooth Codec) or aptXHD even though the slider was previously chosen "LDAC". Once I had un-checked all the other Codecs and re-paired the device it went LDAC... however it tried to go SBC a couple times when I was messing about and accidentally un-paired and re-paired causing the "LDAC" slider in the basic Bluetooth settings to not even present itself as a supported option. I just re-paired once more, and it was good to go.
It seems to be solid now, but I haven't connected/disconnected as I was listening.
As for the highest quality bit-rate in Android over Samsung? Every time you make a connection (even with LDAC default) you must do the following (it's an annoying ritual but I do it every time).
Developer Options > *scroll down quite a bit* > "Bluetooth Audio LDAC Codec: Playback quality" > *Best Quality (force 990)*
The default is stability over quality at 660 rate.
Hopefully the next iteration of the Galaxy Ultra will support the lossless Codec!
Can't wait to check out the wired connection later tonight.