I had a pair you won't care when they change, you won't notice a single thing.. IF you can you got some serious chops.. I could only envy..
They are built on a very low to ZERO feed back.. BUT he (James B) voiced them with actual planars in mind. I met that guy several times once at the old VMPS shop in 2002 or so. Single malt was the flavor of the night.. Good jaz guy.. Keyboards. They called him Pimp Daddy!
He wore a straw fedora with a blood pink shirt.. NO I don't drink.. THEY sure did. I was auditioning a pair of RM40s
VERY serious amps.. They work very well in Tri mode too with good speakers.. Trinaural processor.. SST.. good stuff..
Regards
