Hello, I bought the Jasmine T200 a few weeks ago and I really love it. What a nice little amp that is for it's price. I can finally enjoy listening to my Beyer headphones, before it was total with my receiver as an amp. On top of it, I get really great sound in my gym as an integrated amp powering a pair of small PSB speakers... \n \n OK, enough of useless info, here is my question. I think I'm now ready to start experimenting with tubes but I don't want to buy 5 different models for nothing.\n \n So I'm sure some of you have tried different tubes and would be able to give me advice on the different characteristics of each tubes.\n \n From the documentation the T200 uses two 6P14 which is equivalent to EL84 and two 6N3 = ECC42.\n \n Also a good place to order online would be appreciated.\n \n Thanks for your help.