i think we have to wait for a new firmware release and load the US-JP version instead of the european one... any of you knows if it's already possible to find a non-eu firmware release for S2xx ? another solution is to buy a couple of earbuds more sensitive i tried with the Sennehiser MX-450 (113dB SPL at 16Ohms) and it sounds louder next days i will try a creative in-ear model that have an higher Spl level. and if the volume limit is an hardware limit, just like on an old 1997 tape walkman i had, it's possible to short circuit the resistors... but i think it's so stupid and expansive to develop 2 different hardware boards for eu and us-jp....