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Author Topic: MB-1: Brand New Tubes, no sound on "Edge" or "Full" settings...  (Read 2068 times)

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  • Newbie
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Hey all,
I just switched out what I believe are stock 12AX7A tubes in my MB-1 for a pair of brand new Sovtek 12AX7 LPS.
Unfortunately, i am not getting any sound whatsoever out of the tube channel when I select either "Edge" or "Full".
The "Clean" setting, however, works as expected.
If I replace the old tubes, everything works just fine.


  • Superhero Member
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The MB-1 uses one tube for the cleans and the second is only used when you select edge or full so one of the tubes is dead.
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