Hmmmm my experience of the Jecklins vs the Stax Lambda Nova Signature:
The Jecklins had a huge dynamic range, but they were too bright and had no bottom end. Listening to deep bass on the Jecklins was equivalent to 1 minutes silence.
I just compared their bass to the SR-X's, and the Jecklins go right down to 40Hz too; like the SR-X a bit rolled off, but like the SR-X they can handle some EQ very well.
BUT THEN I received my Omega II earpads from Audiocubes! They could easily slip over the lip of my (newish) standard SR-X pads; no need at all for any destructive activities. The circumaural fit is excellent and extremely comfortable, AND THE SOUND IS TRANSFORMED! BASS, MORE BASS and IMPACT! I'm still bowled over by my impressions of the first few minutes. Possibly because the original SR-X pads stay in place, there's no resonant cavity and so no coloration. Highly recommended!
I'm gonna play some more music. See ya!