WA7 Fireflies (2nd Gen) with WA7tp (Tube Power Supply) Upgrade in Silver

Absolutely beautiful. The craftsmanship and audio quality you get from this amp/dac is wonderful. The internals are housed in an aluminum shell with a brushed texture. The tubes are protected by a heavy glass cover with holes at the top for heat ventilation. The volume knob turns smooth as butter but with the perfect amount of resistance. The weight of these guys are incredible as well. It feels as if they're filled with pure lead. If your butter fingers manages to drop one of these bad boys, you're sure to leave a crater in your floor. (Dont test it) The weight of these make these super stable too so you could plug in and plug out your headphones without having to hold onto the amp because it wont move. Now since I never tried the "amp by itself" version I'm not sure if the "tube psu version" is worth the extra money but it certainly looks very pretty. I also had an issue with one of the tubes but Mike of Woo Audio was kind enough to help me and answer all of my questions.