Please help a new tube user!

I've owned most of the big names in tube equipment and have the Jolida 502B in my bedroom system. Jolida has about the best price/performance ratio of any tube amp. That said the original chinese tubes sound BAD. When you get the unit if those are the tubes that come with it I would retube immediately if your budget permits. The KT-88's referenced above make a major improvement to the sound, especially in the bass. I have also retubed the small tubes with high quality NOS tubes and it does make a very noticable difference. I've been very happy with the NOS tubes from Kevin at Upscale Audio. A full set is rather expensive ($80-$120) but I do think it is worth it. Biasing is easy.

To all who pitched in-- thank you for your help! I'm very excited about moving to tubes... like owning a vintage motorcycle; sure it requires some care, but that's all part of loving the experience. Thanks again! d

don't forget - the new tubes will need burn-in.

Hi, I'm new in tubes!!!! Iwould like to help me someone with bias adjustment of the JADIS ORCHESTRA (EL-34).
Many thanks
john