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Horn loaded cabs

Discussion in 'Amps and Cabs [BG]' started by hammer2748, Nov 2, 2005.

  1. hammer2748


    Feb 22, 2002
    Hartford, CT
    I'm switching a 4-ohm speaker out of a 1x15 cab for an 8-ohm speaker. Is the horn "neutral" as far as impedence is concerned or would I need to change the horn as well to truly make the cab 8-ohms?
  2. billfitzmaurice

    billfitzmaurice Commercial User

    Sep 15, 2004
    New Hampshire
    Owner, Bill Fitzmaurice Loudspeaker Design
    The horn driver has impedance also. More pertinent is what are you doing as far as the crossover is concerned? If you swap an 8 ohm woofer for an 4 ohm you alter the crossover frequency by a full octave. That would leave a gaping hole in the response of the cab. You also have to be sure the new driver has the same T/S specs as the old, save the impedance, or you'll have all sorts of response problems.
  3. hammer2748


    Feb 22, 2002
    Hartford, CT
    Sounds like a huge minefield. Think I'll just leave it as is! The cab sounds great as is, but it's a 4-ohm cab (Peavey Black Widow).

    I'm looking to run an ext. cab with my amp. I have a couple 8-ohm EV speakers (15B) and figured I could load my existing rear-ported cab with one of those and buy a single 1x15 or 2x10 ext. cab to work with it.

    Appreciate the advice. Thanks.