Thanks for the reply and info! Much appreciated! I have an STX and just got the Momentums, so I was wondering if I am missing out on quality. To me it sounds pretty good, but I've read that the STX is not so good with low Ω HP's (as you said here as well) Having said that, would I benefit from a headphone amp, since I am reluctant to change the STX? I like the Schiit. Any other recommendations. I was thinking:
Little Dot MKii http://www.littledot.net/forum/viewtopic.php?f=9&t=816 or
Project Starlight http://www.garage1217.com/garage1217_diy_tube_headphone_amplifiers_007.htm or
Bravo Audio V2 Class A 12AU7 Tube Multi-Hybrid Headphone Amplifier http://www.amazon.com/Bravo-Audio-Multi-Hybrid-Headphone-Amplifier/dp/B00ADR2DTG/ref=zg_tr_13880161_11