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RE: Changing Preamp Tubes?

i switched over to RFT ECC82/12AU7 in my ATLAS magnum. clearer, "darker" bass performance as result. (as a tube collector i have tested dozends of brands in my gear...).
i also gave away those KT120 tubes the amp came from stock. with a great start after approx. 100 hours they turned over to a flat, boring and muddy performance. the worst output tube i ever met. can`t tell the reason for this but many others confirm this experience.

i am happy with penta KT88SC now.

Nunki


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