Music way too low on bluetooth

[MikkBerg]

Hi, I'm having trouble playing music on Spotify from my Oneplus 5T over Bluetooth-speakers. It sounds so quiet when I play music, compared to my friends. I have tried maxing the volume on both the phone, and the speakers, but still the same problem. Has anyone else had this problem before, or is it only me? I always have the newest update on on both the Spotify app, and the Android system. Please help.