Hey , i have a lcd 2f and ifi zen dac do you think there is a noticable quality improvement in single end of zen dac to zen can stacked , will adding a zen can be an improvement in dynamics , bass , details , Soundstage etc??

I agree with your findings with my k712 , he400i 2020 , now lcd 2f , high gain was better for all of em , it didnt affect my focal elegia , tygr300r , hd660s . What it seems is pretty headphone dependant , low sensitivity headphones respond better at high gain.

Are those velour pads .