peedenmark7
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- Feb 23, 2009
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Re-tubed my beloved F50 custom head today and ended up springing for the SP12AX7 tubes . I am wondering if there is actually any difference between them and the plain 12AX7 tube they offer ?
Anytime I see heat shrink wraps on preamp tubes, I tend to think that's the only difference.
Anytime I see heat shrink wraps on preamp tubes, I tend to think that's the only difference.