I am making an inexpensive headphone system for my bedroom and I am looking at the SMSL SD-793II DAC DIR9001+PCM1793+OPA2134 Coax/Optical Input + Headphone Amp. I will be running it from an ASUS OPLAY_MINI/1A/NTSC/AS Media Player. Most of my phones are in the 32 to 80 range but i do have a few...

I have purchased quite a few hand made resistor adaptors from the seller   wemakeamp    in Ebay.   http://www.ebay.ca/itm/271137114239?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649   The craftmanship is of the highest order (nice polished heavy metal)  and I individually tested each...