Haven't heard the III's but I can tell you the IV's were way, way, way more refined and "audiophile-like" than I anticipated. I was also expecting the highs to be a touch "unruly" and I can tell they are not.
In fact I will say that I was almost disappointed in how refined they were. I was expecting something with rough edges and some "f*ck you" to the sound. This is not the case. They are forward and engaging and warm. After that shock wore off I can say that I do love them. They do all music with vigor: RTJ, Napalm Death, Gene Ammons, Zep, Trepaneringsritualen, Merzbow, you name it.
In fact I will say that I was almost disappointed in how refined they were. I was expecting something with rough edges and some "f*ck you" to the sound. This is not the case. They are forward and engaging and warm. After that shock wore off I can say that I do love them. They do all music with vigor: RTJ, Napalm Death, Gene Ammons, Zep, Trepaneringsritualen, Merzbow, you name it.