I love the sound of Amperex Bugle Boys and Orange globe 6dj8's. But the naked, less is more design of the AI M3a I have, those tubes will last about a year. But I have found that using a pair 7DJ8 versions of the above tubes in the line stage (with 6922 Siemens in the phono), has been my solution! I have the same set of tubes for 2 years now! Still test very strong, with killer base, and all that Amperex "wet" soundstage. A nice combo for me.
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