There are plenty of Darkvoice threads going and some of them even have some decent posts complete with tube impressions; however, I did a fairly exhaustive search and couldn't come up with solid information or consensus. In an effort to get a better sense for whether this amp is a keeper or not, I would like to get all the information we can in one place about the good, bad and ugly regarding what various tubes can do for this amp and the headphone you've got plugged into it. Since this amp has achieved something of a cult following among tube noobs and is right at the entry-level price point, it'd be nice if we could get some detailed information helpful to people trying to track down your recommended tubes. Let's keep this thread to the Darkvoice and tubes only. There are other threads going where you can let everyone know of when your amp arrived and the more general impressions you have. I myself haven't an ass hair's worth of information for anyone. That's why I'm posting this.