many thanks to the ones who "really" wanted to help me understand more. my doubts started when I saw on the FiiO website specs that (for example the E09k) the mW delivered to the headphone are = or > of 150 at 300ohm so I started to think that when I connect a 300ohm headphone and the volume was...

Hi to all,   I have tried to search a previous answer to a question in the forum but since now I can't find it...   I have read in the specs that the AKG K601 (120ohm) and K702 (62ohm) both have a max input power of 200mW, I am searching a small desktop power amp (for a starting point I...