I owned the JD1501A a while back and had the same experience with the stock tubes. Don't give up on it yet, as its sound does change enormously with tube rolling. What tubes will work best for you is of course system dependent, but I had great luck with a pair of NOS GE 5751s from Upscale Audio. They're bargains for NOS ($20 each matched) and resulted (in my system) in a very balanced, sweet sound from top to bottom. Svetlanas are $10 each and are said to sweeten the mids/highs.
Is the Jolida the greatest amp in the world? Of course not. Can you do better at the price? Maybe, depending on your tastes. But I do think it's an enormous value--I presently have a JD1501RC on order, to replace the NAD that replaced my 1501A. I'm getting new speakers that need more current, and I missed the Jolida besides. For the money, it does an awful lot right.
If you do buy some tubes to roll, at worst they'll help the Joldia's resale value.
Is the Jolida the greatest amp in the world? Of course not. Can you do better at the price? Maybe, depending on your tastes. But I do think it's an enormous value--I presently have a JD1501RC on order, to replace the NAD that replaced my 1501A. I'm getting new speakers that need more current, and I missed the Jolida besides. For the money, it does an awful lot right.
If you do buy some tubes to roll, at worst they'll help the Joldia's resale value.