I received my new DarkVoice Amp

I received my new DarkVoice about a month early, and I love it! First of all, it is just beautiful to look at , and is in perfect condition. And second, it sounds great. I use my OPPO HA-2 hooked up from my PC through the USB port, then I line out the DAC only from the OPPO to the Darkvoice RCA jacks. I am using the Sennheiser HD 598s with this set up, and holy cow! This thing puts wonderful bass to my 598s that was never there, while still clear as a bell. I felt like I was in the music. I was listening to Deep Purple, Child in Time, Live and I could hear every detail, with a great clear bass that I have not heard on these phones before. I used the stock tubes, and they were really good, but then I put in GE tubes, and they were amazing. I can't wait to explore more music, and maybe more tubes.


Jun 27, 2019
Glad to see you liking it. However, your Sennheiser HD598 has an impedance of 50Ω and OTL tube amps (not the hybrid tube amps) generally* pair well with higher impedance cans like the HD6XX at 300Ω impedance. *It depends on the topology of the tube amp. Supposedly Darkvoice's big brother, La Figaro, works with headphones having impedances of 32Ω and up, which includes most planar headphones (e.g. Hifiman, Audeze, etc). https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-darkvoice-336se-headphone-amp.6549/