I built my self an iso box that I put my 1x12 in for recording. Sennheiser MD 421 and e609 are the mics. Presonus Eureka and Joe Meek VC3 are my mic preamps. I've tried all the classic mic positions and ones no so traditional, but I can't seem to capture my amps tone. I just ordered a Royer 122 hoping that it will fix the problem. The iso box is lined with Auralex Sheetbloc and then Auralex 3" acoustic foam on top of that. The 1x12 sits inside on top of an Auralex Gramma Iso Platform. But could it be the acoustics in my iso box that's preventing the mics from capturing the tone? Help!!!!!