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PHANTOM POWER ON AMP/ D.I. - WHAT AMPS DONT LIKE IT?

Discussion in 'Amps and Cabs [BG]' started by anderbass, Apr 11, 2006.


  1. anderbass

    anderbass

    Dec 20, 2005
    Phoenix. Az.
    I've heard early SWR is on this list, any others?

    Is there a (inline) device, to help-out with this problem?
     
  2. Bob Lee (QSC)

    Bob Lee (QSC) In case you missed it, I work for QSC Audio! Commercial User

    Jul 3, 2001
    Costa Mesa, Calif.
    Technical Communications Developer, QSC Audio
    My BBE 383 preamp doesn't like seeing phantom on its XLR output.
     
  3. Bob Lee (QSC)

    Bob Lee (QSC) In case you missed it, I work for QSC Audio! Commercial User

    Jul 3, 2001
    Costa Mesa, Calif.
    Technical Communications Developer, QSC Audio
    I solved it by using the balanced output to feed my power amp, and when I need a DI feed to a board I use the pre's unbalanced output into a direct (DI) box. I have both a passive (transformer coupled) and an active direct box. The transformer one doesn't pass DC from the output to the input, and the active one actually runs on phantom power, so they're both suitable for the situation.
     
  4. Plain Old Me

    Plain Old Me

    Dec 14, 2004
    There was some question about the Mesa DI a few months back. Mesa got back to me, and its perfectly fine to run Phantom on a Mesa 400+ DI.
     
  5. tadawson

    tadawson

    Aug 24, 2005
    Lewisville, TX
    Yeah - the 400/400+ DI is fully transformer coupled.

    - Tim
     
  6. My AG500 does not react well to phantom power. It tweaked the hell out one night when the soundguy didn't ask me whether it could use phantom power, and distorted pretty heavily the whole night.
     
  7. JansenW

    JansenW

    Nov 14, 2005
    Cambridge, MA
    My Demeter HBP1 preamp should not be connected to phantom power.
    My Eden Metro is OK with phantom power.
     
  8. Munjibunga

    Munjibunga Total Hyper-Elite Member Gold Supporting Member

    May 6, 2000
    San Diego (when not at Groom Lake)
    Independent Contractor to Bass San Diego
    Eden's OK with it. Aguilar DB750 is OK, too.
     
  9. would love to know if the sunn 300T is safe with it? anyone?
     
  10. anderbass

    anderbass

    Dec 20, 2005
    Phoenix. Az.
    I ask the sound guy and/or chech the board myself. I see a lot of global phantom power switches that have been on for years.
    When I ask-(inform) the uh..."sound guys" at the small clubs I play, there reactions range from a blank stare to "Gee I didnt know that".
    We all need to spread the word.
     
  11. Kael

    Kael

    Dec 26, 2004
    Oklahoma City
    I had thought previously that the thunderfunk DI was not phantom friendly, so I PM'd Dave Funk. I was wrong. It is phantom power safe per Dave.
     
  12. IIRC, it's transformer coupled, so you're OK.
     
  13. Jeff A

    Jeff A

    Oct 22, 2005
    CT
    Is the DI in the Fender TBP-1 preamp phantom power safe?
     

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