hi, want to ask can the can fiio btr5 powered beyerdynamic dt 770 80hm? planning to buy the dt 770 ohm. i’m new to this audio thing.
Should be fine, shame you’re limited to the se out with the 770’s. The BTR5 produces 1.6V (Single-Ended) and 2.8V (Balanced) at 32 Ω, so don’t get the 250ohm 770’s and expect them to be driven fully 
I’d think you’d be fine with the 80ohm version.
thank for your reply