SL, give the cable about 30 hours to settle down.
The FiiO RC MH1, after about 25 hours, is settling down into a great listen with the MLs That slight injection of warmth--I will call it "warmth" for lack of a better word right now--has ripened into nice lushness and liquidity that carries the tone and detail of the Mikros 90 into another category.
During the very first hours, the bass is a little out of focus--foggy. After about 12-15, the bass has not yet settled down. It sounds like a disjointed "rim" or "halo" of midbass surrounding the midrange. There seems to be an annoying overhang or honkiness around vocals. I wasn't sure whether or not this was a coloration imposed by the cable itself at this point, because it did not sound like it was integral with the source recording.
However after about 25 hours--whether due to cable burn-in, brain burn-in or the wine I drank--the RC MH1 finds its stride.
Supertramp's "Bloody Well Right" and "Rudy" definitely benefit from the added midbass body rendered by the FiiO, there is more natural push and bass drive with the guitars. A more "filled out" sound overall.
The bass on Neil Young's "Old Man" and "Heart of Gold" came across with a real warm peal, a "licking" quality, that made me enjoy the track more than ever.
Jefferson Airplane's "Crown of Creation" and "Pretty as You Feel" came across with a renewed and natural warmth/body particular to the FiiO.
Gracie Slick's signature vocal on "Triad" came across with a settled warmth/presence that seemed to better convey the emotion of this track.
Finally ended with Shirley Horne's "Once I Loved" (again). Definitely coming across with a warmth/body/presence unique to the RC MH1's rendering.
Another analogy with saxophone:
Pipeline ET-4: you hear more of the bite on the reed and sound originating primarily from the mouthpiece.
FiiO RC MH1: you hear more from the bell and sound originating/developing through the body of the horn.
Again, it is a slight shift in spectral emphasis, not a quantum 100 Hz leap.
Will continue to burn-in the FiiO on my desk gear today.
vienbo and doctorjazz might want to give the FiiO a shot. Again, the RC MH1 will not turn the Mikros 90 into "Ultrasonesque" bass beasties, but I think the cable brings a welcome sense of warmth to the ML's bass (and overall frequency spectrum) that neither the stock cable nor the Pipeline offer. In addition, the FiiO brings out more liquidity and smoothness from the Mikros 90. It's like having a different set of headphones, with the MLs faithfully conveying the new configuration of upstream components (including cables).
It's $30.99/shipped and there are NO fitting issues with the input plug.
Edited by pataburd - 2/12/14 at 2:42pm