My 25+ year-old Sennheiser HD600 headphones finally just disintegrated. Now I'm searching for a cost no object headphone to replace them. Beyond stellar sound quality, I'm looking for extreme comfort, light weight, luxurious materials, and beautiful visual aesthetics. Sort of the core values of an Aston Martin, but in a pair of awesome-sounding headphones and without the *necessity* of EQ fussing (I may still EQ though). I don't want to turn headphone ownership into a hobby, I just want to enjoy them.
I've read this entire thread from start to finish (phew!). I'm excited by the Expanse as a possible contender, but since I never found the HD600 to be terribly bass-lean, I'm uncertain that the Harman target is for me. So I'm left with a nagging concern that I may find the Expanse too bass heavy, or that maybe I won't like the midbass hump, or that maybe I want a more open-backed feeling headphone like the HD600. I don't need closed back for sound isolation, which leans me toward the Expanse.
I ordered a Topping DX5 II as a hopefully "drive anything" DAC/amp combo. It seems like my best path forward is to buy the HD600/650 to keep as a baseline reference headphone and audition other headphones against them, returning the rejects within the return window. Then if either headphone develops problems, I have a backup while they are being repaired.
When I do my auditions, presumably I should expect the Expanse (or whatever) to be revelatory in terms of tonal balance and detail relative to the HD650? It's hard to quantify the superlatives in this thread, but that's the impression I'm getting. For the price, I would expect a significant improvement over the HD650.
IMHO. Expanse does not remotely sound like the HD600. You're better off with ZMF Tessidera if you're wanting to resemble something close to HD600/650 tonal signature but with planar magnetic drivers so transient response and lower overall distortion should be perceived as higher clarity