I just signed onto the Darkvoice drop the other day. I bought it as an amp for Sennheiser HD700 headphones primarily. I also own the Massdrop Hifiman 4xx and AudioTechnica ATH M50 headphones.
I'm using both my LGV30 phone or Fiio X5 iii as sources for music, paired with Fiio A5 or Montblanc amps to drive all these headphones. So far, in order of preference , I like the HE4xx the best, followed by the M50, and then the HD700. Im a bit new to headfi. I wouldn't call myself an audiophile, but I do enjoy the differences in performance that higher end audio components offer. BTW, I've got a Massdrop O2 amp on the way as I'm typing this. Anyway, I've read a lot about how the 650's love the DV. Anyone have experience with the Sennheiser HD700 and a DV? What tubes are you using? Why?
Btw, I mostly listen to classic and hard rock/metal. Then, it's a mix of Symphonic Orchestra music, jazz, country, and light opera along the lines of Andrea Bocelli and Sarah Brightman, but definitely not limited to them. So, if you have HD700 cans, let me know what tubes you like best. TIA.