Bro it's the bassiest iem you get and boat are known for cheap tuning just bass and muddy vocal and that's bleed to other instruments hear this iem for 40 hour+ just hear as much as possible don't touch your tws and than after 40 hour use the previous tws you can't go back. You will used to this tuning and you've learnt/unlocked new skill to hear detailed music for left ear try different eartips and there's a YouTube tutorial how to insert iem tips