best tube for unico cd & 80w amp.


i just got this unison pair, should i upgrade both cd and amp. with the same tubes or just the amp. i am new to tubes, the combo sounds great already, but i have read a tube change can make a big difference
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My advice would be to make sure that you've listened to the combination long enough to fully know how they sound. Then, change the tubes in only one component at a time to see if you like the results. Personally, I like Brimar 13D5's in my Unico amp.