tomscy2000
Headphoneus Supremus
I love semi-open designs; you can make them sound great without having to run up production costs. The Superlux HD381F was amazing for $20, as was the Brainwavz M2 for ~$35. I upgraded to the Phiaton PS210, and they sounded nice and clear as well, and from the new measurements, the S1 and S2 look way better than even the PS210. From how the numbers look, the S1 might actually be preferable to some people; the S2 seems like it's just a little more refined and smoother, but not necessarily more exciting or anything else. The S2's square wave and impulse response are slightly cleaner while it has a bit more bass roll-off (not really as important with an open design). The S1 look like a sub-$100 bargain, though.