Disclaimer : the Austrian Audio Hi-X55 are my second pair of headphones and I've been producing for 5 years now as what you can qualify as a bedroom producer
Don't be put off by your first listening session with the Hi-X55, you'll be sure to regret it !!! I'm saying this because it took me 1 day or 2 to be used to how flat and neutral this set is.
Sound
Do not expect bass oomph but excellent restitution ! However, you will be able -at high volumes- to hear extremely low bass frequencies, or even feel it for the lowest ones, that is. I'll insist on how these headphones are flat on the entire spectrum, which will help you monitor more closely some details, if you are mixing your tracks
Confort
The set might not feel as secure as some Sennheisers out there, but the circum-aural build will isolate just enough to deep-dive into details. Make however sure to be in a quiet environment. Excellent build and material, your ears will not overheat, great pads.
After several months of use, I now really appreciate it and enjoy finding new details each time I listen to my mixes!
Thank you AKG (yes, AKG)!