12au7

  1. J

    DBX 367 PreAmp with an RCA 12AU7A

    I just bought an RCA 12AU7A tube to replace the one in my DBX 367 which gave up. It doesn't work. No audio being passed or metered. I checked connections. Is this a wrong tube for the DBX367?
  2. S

    Preamp tubes - 12ax7/12au7/12at7 VS

    6SN7 & 12SN7. any of you guys who build or tinker have any opinions? I know the au,at & 6sn7 are lower gain than their counterparts. Any thoughts on the way they sound? Thanks
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