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Recommend me a preamp tube for SWR

Discussion in 'Amps and Cabs [BG]' started by supremo, Jan 14, 2012.

  1. supremo


    Oct 20, 2008
    Hi, it's time to replace the default preamp tube in my SWR Black Beauty combo.
    Which 12AX7A tube do you recommend?
    I like warm sounds as my band plays classic 70's rock music
  2. 4-string


    Jul 23, 2006
    I have had good results with JJ tubes.

    I don't think a pre amp tube would drastically change that amp.
  3. f.c.geil


    May 12, 2011
    If you want a new tube, then JJ/Tesla are the best tubes made today. If you want vintage, then I'd suggest RCA. Nothing breaks up like an RCA. Do not get an "NOS" tube, as they are almost all fakes anymore.
  4. FrenchBassQC

    FrenchBassQC Supporting Member

    Jul 13, 2011
    Gatineau QC CA
    Ruby are not bad either, that's what Eden uses in their amps.
  5. RedLeg

    RedLeg Supporting Member

    Jan 24, 2009
    Kaiserslautern, Germany
    Nov Shmoz Ka Pop?
    JJ ECC803S
  6. AdamR

    AdamR Supporting Member

    Sep 24, 2007
    Bethel CT
    I rollled a few tubes through my old SM500 and heard zero difference. I ended up with a Tungsol but mainly because by the 3rd tube I gave up.
  7. supremo


    Oct 20, 2008
  8. RedLeg

    RedLeg Supporting Member

    Jan 24, 2009
    Kaiserslautern, Germany
    Nov Shmoz Ka Pop?
    thats mainly for the guitar guys. i use them in my shuttle and like what they do.
  9. supremo


    Oct 20, 2008
    guitar amps?
    so i can use it normally for my bass amp!
    maybe i have to try JJ.
    What about Sovtek?
  10. Runlikegregg


    Dec 31, 2011
    I've gone through 3 or so preamp tube in my Eden and I haven't been able to tell the difference.
  11. lomo

    lomo passionate hack Supporting Member

    Apr 15, 2006
    I'm currently using old Raytheon and Amperex pre tubes in my Walkabout. Superb tones. Got them both on eBay. Pricey compared to new tubes (which I also bought for comparison) but sound thicker and nicer to my ear, at least in my Walkabout. In my M9 there was no real difference that I could discern....how these preamp tubes influence tone is somewhat amp dependent, so it's a crap shoot. If you can afford a few different tubes I highly recommend using a single bass, leaving your eq flat and sampling several tubes.
  12. f.c.geil


    May 12, 2011
    SovTek are junk, IME.
  13. pacojas

    pacojas "FYYA BUN"

    Oct 11, 2009
    if you haven't heard,...

    the SHUGUANG 12AX7-C9 (china) has the highest gain in this kind of tube and are hard to find. i got the lastest equivolent, the 12AX7-B (china). i replaced a 12AX7-EHX (russia) and was amazed by the difference!

    the best way to describe the sound comparison,....

    12AX7-EHX = lobster tails

    12AX7-B = lobster tails dipped in refined butter!!!! :hyper:

    unfortunately, i sold my SWR before i was informed about the Shuguang. my current rig includes the Demeter HBP-1 and the tube swap made a HUGE difference! as others have mentioned there may be no significant change for you, so.... YMMV.

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