I've been a 4x12 guy for about 25 years. I keep trying FRFR and just can't get a sound I hear in my ears like I do sitting in front of my 4x12. I've made IR's of my mesa cab that sound pretty amazing recorded but running through the FRFR setup jamming doesn't give me that usual sound I am used to. So i started messing with IR's and surprisingly the old GERMAN Factory 63 with a 58 DYN & 87A COND sounds amazingly like sitting in front of my 4x12 jamming like I usually do. I pull out a little mids in the preamp and a little cut in cab low end and from my FRFR sounds pretty close to sitting in front of my 4X12. Its not even a UltraRes cab but sure gets me close to the 4x12 in room sound. Just a little suggestion for guys who blow their ears out like me in front of their 4x12 cab of choice.