Opening Premiere ruins the sound quality through bluetooth headphones

Try and set Default input to None in the audio hardware of the preferences.

Trata de configurar la salida de audio desde preferencias de audio y verifica el problema. Por expreienci propia no uso audifonos o parlantes bluettoth debido a la latencia que existe (desfase de audio)
Salu2

Yes I remember facing such an issue. Try fiddling with the audio hardware settings, I think the latency fixed it for me if I remember correctly, but not sure which value. Just mess around with those settings, maybe it'll fix your issue too.