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XLR Input on Trace 1048H

Discussion in 'Amps and Cabs [BG]' started by jon36992002, Apr 13, 2014.

  1. jon36992002


    Jun 7, 2012
    I picked up a vintage 1048h the other day, and I am really confused by the presence of the XLR jack on the back. Is it a pass through for an unamplified signal? Was XLR used for powered signals when this was made?
  2. There was a period of time XLR's were used by some for speaker cables. Thankfully speakons became the standard.
  3. Sounds like a line out for the P.A.
  4. Nope, they intentionally the wrong mate used for line level (a standard mic cable won't work).

    We also used to use AC mains twistlocks for high power PA. 1/4" was never a "good" connection for anything other than low level signal.
  5. Ahhhh............

    Didn't realize it was a cab.

    Carvin did it years ago too (I had a "V" series cab).
  6. jon36992002


    Jun 7, 2012
    Super weird, thanks for the help. I think I'm probably just gonna swap em out for a set of speakon jacks. The connectors are about the same size/
  7. First use I remember was JMI Vox back in the '60s. :)
  8. Excellent plan! :cool:
  9. BassmanPaul

    BassmanPaul Gold Supporting Member

    Aug 25, 2007
    Toronto Ontario Canada
    Typically the hole is 3/4" for an XLR male as used for a DI. out. The female version, as used for a mixer mic. in, is 15/16" diameter. This is precisely the same mounting as an NL4 Speakon which is what you should use. Wire hot to +1 and cold to -1. If the cabinet has two connectors, replace both and jumper +1 >> +1, -1 >> -1, +2 >> +2 and -2 >> -2. linking the second pair will allow for a pass through in a bi-amp system.