A cold day in hell intro only by winds of plague. Lowrider by Korn. Break shit by Jasiah. Maxwell murder by rancid.

All together that’s about 5 minutes flat

I would say yes but if you like them enjoy them. Personally the XM4s are still rather impressive set of headphones imo and can get them for less than 250 now if you look around but overall hey if you love them then they are worth it

Personally no. I had a few headphones that sounds amazing out the box and never needed tuning

That being said. The new headphones coming out with their own personal EQs are quite marvelous and do make the headphones work better, but a lot of times these headphones with proprietary EQs usually sound muffled and tinny out the box. So EQs is a must to make them sound correctly.