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In Reply to: RE: 6sn7 GTA or GTB ??? posted by em on October 20, 2009 at 14:20:25
For whatever it's worth, I've found the tone of GTA is a bit better than GTB I've tried. Applies to Sylvania, GE, and RCA's. Even right from the get-go (before break-in), I've found the GTA had a clearer, cleaner tone (esp bass and midrange).
I've always thought the GTA and GTB shared similar electrical specs (except the warm-up properties).
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