Thanks for the review! I can't say that I agree, but everyone is entitled to their opinion.
Since you're so used to the Magnum signature, I wonder if you would have the same thoughts after spending a week listening to the Paradox exclusively and then going back. I was very much a Grado-phile, and thought they sounded very natural -- but after exploring other (more neutral) headphones and coming back, I'm always jarred (not in a bad way) by the coloration and tonality. I still very much love my Magnums for particular moods -- they're exciting, their voicing makes guitars so seductive, and the mid-bass hump gives a satisfyingly punchy musical experience.
I'm a bit confused by this part of your review:
Originally Posted by chrislangley4253
The Paradox definitely did not sound natural to my ears. They did have a mostly neutral sound signature, but the tonality really was a turn off for me.
I find this curious, because in my experience, tonality issues usually stem from a headphone's lack of neutrality. Skewed frequency responses will throw off the natural sound of instruments/voices as different ranges will be over or under represented. All of the headphones that I've heard that have an even and neutral sound signature (Orpheus, the TOTL Stax's, UERM and Paradox) tend to have tonality spot-on. On the other hand, Magnums have issues such as shouty mids, extra energy in the sibilance region, pronounced "edge" in the high-mid region, etc. that make them a bit less than accurate tonally.
I'm not sure if I agree with Grados or Magnums being a good reference for "natural" sound -- but that's part of their appeal (to me, at least).
As far as my own impressions of Magnum vs. Paradox, the Paradox are definitely more neutral and even across the spectrum. The bass of the Paradox indeed reaches further down, although the pronounced mid-bass of the Magnum gives them a greater sense of quantity and punchiness. The Paradox does better at the rumble because it reaches further. Kick drums don't snap quite right on the Magnums because of the bass roll-off, which goes back to the point of neutrality affecting tonality.
Both are great at imaging (neither approach HD800 levels, though), but I found the Paradox to give me better spatial cues (micro-detail) -- partially due to the blacker background. The Magnums do sound more airy. The Paradox sounds faster, As mentioned earlier, I find the Paradox to have more accurate tonality/timbre, which is a big deal to me. And while the Magnums are much smoother than the typical Grado, the Paradox is on a different level of smoothness (almost Stax-like).
Both are excellent. The Magnums can be more fun if you like their specific coloration. But the Paradox is a better 'phone from a fidelity standpoint.
As usual in this hobby, it's all subjective / we all hear differently / we all have different preferences / YMMV / etc.