Just listen to the sub bass region, there should be a long boom bass . Longer than it should be.

I never tried Q40 and MDR Z10 but COP is warm, treblenya roll off. K619 bass is mega boost , especially the sub bass. Decay super... And a mid extra long.. Treble is boosted high It's great for Electro PS: Pardon may grammar

I was comparing the K619 to Beyer COP but I prefer the 619 because the bass was mega boost compared to the COP

You could count me in I guess Since AKG K619 is a basshead cans

Mine was Shure SRH240