your unit is definitively defective.

Personally I'm happy to be a guinea pig if they fix the problems and there is no risk of bricking the device 🤷🏻‍♂️

if I plug my BTR15 into an AC/DC charger and try to wear the headphones I get a small zap so isolation isn't perfect. it doesn't happen if I plug it into a power bank so I guess it's something with the ground.

It happens to me as well all the time. using the 4.4mm output, nicehck silver something something cable, shure aonic 4. 1. set from `H` to `L` and hear the level difference 2. power off 3. power back on 4. it shows `L` but it's loud. 5. switch from `L` to `H`, no level difference 6. set back to...

You clearly received a defective unit, mine has never rebooted itself

I upgraded my BTR5 exclusively because I kept breaking the 2.5mm jacks :tired_face: so I switched to 4.4mm jack cables and 4.4mm to 2.5mm short cables which work much better than solid adapters IMO. like this in your case: https://www.aliexpress.com/item/1005005570274817.html

is the XMOS firmware upgrade included on the Bluetooth firmware or both need to be individually upgraded? one via Bluetooth and the other via USB from a Windows machine

DAC converts digital PCM data coming either from USB or BT to analog sound, then the AMP makes that analog sound louder

I spent a whole day with the primary source (phone) in silence, and the secondary (laptop) playing, and no sound came out at all. If I'm playing (and carrying) from the phone and move away from the laptop for a while, and then come near the laptop, the BTR15 will pause the primary source and...

As explained my problem relates to choosing sources and continuity. when it feels like reconnecting to "the other device" it will stop playing the current source. And there seems to be no way of telling it to play from the second source other than re-pairing.

I only use the balanced output, volume usually around 20.

the second DAC/AMP is only used via the 4.4mm balanced socket

I paired my laptop and the phone, but to be able to listen the audio from the laptop I need to re-pair it every time. When I'm listening to from the phone, if I walk away from the laptop it switches to "connecting" and pauses the audio from the phone. often disconnecting the phone and becoming...

does anyone know how to tell the BTR15 which of the BT sources to use? It's driving me crazy.

The same happens to me