Three generations of Perun headphones.
Here's my impression of each shortly. Driven with BHSE and Carbon.
Classic open-grill version
This is the “open grill” predecessor of the Live Sound version. It has a bit narrow soundstage in width but extends in height. The bass and treble is good, but the star of the show is the intimate smooth mids. Good for medium volume listen to vocals, acoustic and classical. Easy to drive, like Stax 009 and L700.
Before getting the Live Sound and Rock version I sold my 009 to enjoy more organic and smooth sound of the Perun.
Live Sound
LS is very balanced, clear, airy and has a huge soundstage. Everything has its location in the 3D space and the imaging is sharp. Overall presentation is very smooth and extends to both low and high ends. But most of all, it has very clean and natural midrange and bass texture with real weight. The sound reminds me a lot of Abyss Phi CC I had earlier. Abyss is more aggressive and forward presentation. LS is a bit more laid-back, clearer and cleaner, especially in the mids. One thing a noticed for LS is the mid-bass bump similar to 007mk1 which gives warm and smooth, non-fatiguing listening experience.
LS is one of the most comfortable headphones I have experienced. There’s very little clamp on my head but it still sits tight. It is as hard to drive as is the Stax 007mk1 and Phenomenon Canorum.
Rock
Rock appears to have even more balanced FR than the LS. The soundstage is [EDIT] similar to
smaller than in LS
and the presentation is more in front and centered. Overall, Rock is less laid-back than the LS. It doesn't have the mid-bass bump but extends lower like Canorum does. The mids are more distant and dry compared to LS. For metal and hard rock this seems to work nicely, but for acoustic and vocal I prefer the Classic and LS mids intimacy. Rock is also very comfortable to wear.
One strange thing I experienced with Rock was that they need lots of warm time to sound their best. It takes like 1 hour to really have the stators charged fully to produce maximal soundstage and weight on the notes. Initially it needs like 50% more power than LS and stabilizes to 10-20% more over time. I still don't know if I have heard it in its best... This is something I still need to test with time. Anyway, Rock easily gets the most listening time for me now.