Hi, i'm an happy owner of a pair of Sennheiser HD 558 foam modded, with 60 Ohm of impedance. I've recently bought from China the amp NG98 MKII, that for me sounds very well, but... i can reach max 1/5 of the volume, before breaking everything. It seems to have a lot of power, much more than what...

Hi, since i'm interested too in the TP30 as a cheap headpgone amplifier, can you tell how it sounds thru the hp out? I would use a pair of Sennh HD 558 in my bedroom with the notebook (so i need an amp with integrated usb souncard/DAC). Thanks