SVT-15 x 2 Phase Issue

Discussion in 'Amps [BG]' started by Lagaupia, Apr 6, 2014.


  1. Lagaupia

    Lagaupia

    Joined:
    Apr 23, 2007
    Location:
    RI
    I recently got 2 Ampeg Classic Series SVT-15E's.

    I plugged in my SVT and thought it sounded thin. I know that the stock speakers in these cabs only handle 200w but still thought it should have sounded better than it did.

    I took my GK MB500 and hooked it up to both cabs individually and they both sounded great.

    Could I be experiencing a phase issue with these cabs even though they are identical?
  2. lokikallas

    lokikallas Supporting Member

    Joined:
    Aug 15, 2010
    Location:
    los angeles
    Search "battery test"
  3. rodl2005

    rodl2005

    Joined:
    Jun 1, 2005
    Location:
    Tasmania, Australia
    Try Daisy chaining the cabs?
    Back when I had a LMII when I plugged 2 cabs into the 2 speaker out jacks I had phase issues. Daisy chained em & all was fine 😨😨😨
  4. B-string

    B-string Supporting Member

    Joined:
    Nov 21, 2008
    Location:
    Lake Havasu City, Az USA
    Short answer. Yes.
    It is always possible for the cabs to be out of polarity. Either by cable wiring or internal cab wiring.
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  6. walterw

    walterw Supportive Fender Gold Supporting Member

    Joined:
    Feb 20, 2009
    +1 on the 9V battery test:

    plug a 1/4" cable into the cabs, then touch a 9V to the other end; when you touch the + of the battery to the tip of the cable and the - to the sleeve, both speakers should jump forward.

    you should do this test on any cab you get, especially used.
  7. JimmyM

    JimmyM Supporting Member

    Joined:
    Apr 11, 2005
    Location:
    Apopka, FL
    Disclosures:
    Endorsing: Ampeg Amps, EMG Pickups
    Yep, would bet money that's the problem.

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