Well, I can't say about that one, but I've had the chance to test the MH1's with 3 different amps from a friend headfier, and found them to have low tolerance to distortion.
Either the amp didn't like the headphones, or the other way around, but the fact is that there was much distortion present from the get go.I didn't even need to raise the volume much. (One thing worth mentioning is that this particular amp had been sitting in the drawer for quite some time, but the fact remarks that I've also tested it with two other headphones, and the results were much better)
On this one, the distortion sets in at half volume, with bass setting to half, otherwise, distortion will start sooner. Again tested with the same other two headphones, which faired way better, even at full bass!
It was with this amp that I got the best results. They took more amping than with the other two amps before getting distorted.
Setup used for the tests
Source: Sansa Clip+
Amps: CMoy, Lisa III and O2
Headphones: Sony Ericsson MH-1, AKG K450 and VSonic GR07
Song: Chris Cornell - Part of me