V2 and VB are used interchangeably here. It's the same thing but in conversation with Jupiter we've both called the mod V2 and VB. On the JAR website it's called VB. It's also the second version he's made but because it's so different from the OG and not necessarily better (just totally different), he calls it VB... most of the time. We're currently kicking off a tour of the JAR600VB along with a pair of OG JAR600. This is the impressions thread where loaner participants can say what they think about both headphones. I'll start. I've lived with the OG JAR600 (mine is a silver screen HD600 variant) for awhile. I just got my new JAR600VB (black screen HD600 variant) days ago. Since Jupiter is heading back to college soon and his modding output will be reduced (read longer lead times), I wanted to get this tour cracking as soon as possible. Much has been said on this site about the OG JAR600, but I'll give a quick rundown: I can't listen to a regular HD600. It's way too bright and stabby to my ears. JAR600 takes the heat off the top end and tonally leans it a smidge towards an HD650, while tightening up the bass and also giving it more thump. This is basically exactly what has to happen in order for me to enjoy an HD600, so this mod is perfect for me. With the new VB mod, talking to Jupiter he said there was a different goal, and I think he knocked it out of the park. He was trying to let us hear the driver instead of the various other things that get in the way and generally shape the sound of the headphone, while still taming the upper end stabbiness. Listening to the VB, it has increased clarity and detail, a larger headstage, and a much more direct feel. The headphone seems to get out of the way and let more musical information through. It's impressive. To me, that brings it closer to HD800 level in a few ways (I'm a fan of the HD800. If you're not, maybe you prefer OG version.) I think if you have a very resolving system you will appreciate what he has done with VB. I will say though that each version plays to different strengths in systems. If you have a bright, lean SS system you may prefer the OG. If you have a tubey, little bit bloomy, little bit laid back system you may prefer the VB. I really enjoy both on my system. I believe my system to be rather balanced, so that makes sense to me. We'll see what y'all think.