Headphone advice

Hi guys. I need some advice. I bought a set of sennheiser hd600 and they are great. However when I’m playing my les Paul every amp is overdriving no matter what volume. I’ve tried my older headphones and this isn’t the issue.
I bought them as I’d heard that some QC users have them and really enjoyed the sound they produce.
I’m in desperate need of some advice as they were quite expensive.

You can adjust the headphone level in the swipe down I/O settings. You can see in the pic that I have mine turned way down:

It sounds like the les paul just has hotter pickups. Turn down the input gain.