Ilomaenkimi
100+ Head-Fier
Personally i think that i don't believe break-in, ears can "break-in" to the new sound, not the headphone.A few comments:
1. With RS-1x, the listener is the prime beneficiary of necessary headphone break-in;
2. 18 hours is nowhere close to the time required by RS-1x for effective break-in: think 200 hours with music;
3. Replace the L-cushions with F-cushions. I could not stand the cupped, hollow, screechy sound (especially on saxophone) from the Ls. I have been a happy user of Fs for almost 1-1/2 years. They provide for me sonic impact, great imaging, wide soundstage…
If headphone would require break-in, it's sound would change endlessly?
My experiences with RS2x tells me that replacing L-pads to F-pads ruins RS2x almost totally; soundstage "dies"; airiness, size, 3D imaging, all gone. It collapses. Sound is very repressed with F-pads.
Also F-pads softens the sound too much, vitality suffers. Bass gets muddy and that fine articulation suffers.
Good points? Sibilance relaxes a bit, that is a good thing. Nothin else good i did not found of that pad rolling.
If person likes sound with F-pads i recommend Hemps.
Again: at Grado they know what they are doing, they put "right" pads for you at the factory.