Did you ever tube swap your JEL? I have a JEL-50. Yes it has a HUGE flubby bottom end. I emailed Dave about it. I almost returned it after not getting much resolution from him. There was a JJ in V1, V2 and V3 had B.A.D. labeled I believe to be Chinese preamp tubes. THEY ALL SUCK! especially the JJ -loose booming low end. After trying various 12ax7s (square getter Chinese, Tung-sol, EH, other JJs, the winner was all 3 Mullard Reissue CV4004s. I have the bass on 4-5 now, tight, thick with harmonics on the high strings. Before was boomy, loose, and piercing thin highs as I tried compensating the low end issue with more presence and treble.
Your Jose sounds great! Chewy, and harmonics galore. I wasn't jabbing you with the Poison comment.