Hi buddy, I wonder to start this thread earlier when I received my amp and searched that there is no such tiltle so I start it. Please also state what headphone/s you're pairing with and how do you love the combo. My WA6SE arrived by mid-March this year. I ordered a Sophia Princess 274B and two pairs 6EW7 along with the amp. Then, finally the following tubes are arriving my home in the following week. Found that I did not swap the Sophia into any other rectifier when I put it in and after burn-in, DAMN, I waste another piece (or 2?) Sophia on all these rectifier although most of them are great tubes but not as good as the Sophia. It is really an wonderful amp which sounds much over than expected and getting better and better. I have it pair with Senn HD650 (APS V3 SuperNylon/ RAL up-grade with Cardas Plugs and Furutech Plug), AKG K701 (re-cabled by Jena Labs Cable) and JVC HP-DX1000. The K701 combo is the best IMO that I'm not expected, I preferred the HD650 would be a perfect match with WA6SE ( learned that from a lot of reviews and impressions in head-fi) before I receive the WA6SE but I finally found I love the synergy with the K701 combo over the Senn. I can hear those deep, impactful and tight mid-bass from the K701 that I've never heard before and don't have to mention the airy, clearity highs as usual, it make the K701 sounds much more balance. For the DX1000, I don't think it is a good matching or just my weird listening taste, I thought that the highs from the DX1000 is veiled and the mid-bass is bloated with 6SE, not familiar to others who love this combo a lot. Not to say much here since there are tons of good reviews and impression here in head-fi for Woo Audio's products. But I have to state that I love my WA6SE very much.