From what I've seen, Jolida skimps on tubes. Usually, cheap Chinese ones. Start with some mid priced ones and you will be amazed! Check sites like tubeworld just to learn about the different tubes and prices (they are pricey). Then, buy some and try it out? I'm not into used tubes but it is a cheap way to find out what you like. Try: tubesandmore.com, thetubestore, echohifi, upscaleaudio.com and many more...
