PA speaker horn attenuator fried, where to get one?

Discussion in 'Amps [BG]' started by rojo412, Mar 27, 2014.


  1. rojo412

    rojo412 MARK IT ZERO! Supporting Member

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    Last week at practice, a horrid burning smell wafted through the jam room. Turns out, the PA speaker had a horn attenuator that decided to almost catch fire.

    It's a Fender 1275A speaker and the part has "AT-68 L-16(ohm sign)" on it. Since these are ancient speakers, I didn't see an easy to find source for a new one.

    Anyone have a suggestion on what to do for a replacement? And where I could get one?
     
  2. tkonbass

    tkonbass I'm just one of the out-of-focus guys. Gold Supporting Member

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  3. David Jayne

    David Jayne

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    Or just omit it and wire direct to the horn. If you can still get it to sound good, you're done.
     
  4. Bassamatic

    Bassamatic keepin' the beat since the 60's

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    NO - you cannot wire directly to the horn unless it is a Piezo horn. Connecting a regular horn in parallel with the woofer will cause a huge drop in impedance around the crossover point. It may also be unbearably loud.

    This is a 16 Ohm L-Pad. They are designed to keep the impedance constant at 16 Ohms wherever it is set. Get a replacement from parts express or on eBay, etc. Maybe even Radio Shack. Maker sure it has decent power handling capability. I don't know what the speaker's power handling rating is, but the L-Pad should be 10-20% of that (most power goes to the woofer). Bigger is not a problem, it is safer.
     
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  6. rojo412

    rojo412 MARK IT ZERO! Supporting Member

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    Thanks, everyone!
     
  7. Cirk

    Cirk

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    Could also blow the tweeter by not using an L pad. Best bet is to disconnect it until you can fix it properly.
     
  8. rojo412

    rojo412 MARK IT ZERO! Supporting Member

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    When it almost caught fire, I cut the wires to it and we threw it outside.
    So if I find a 16-ohm L Pad with a hefty power rating, I'm good? It's a 100w speaker.
     
  9. tkonbass

    tkonbass I'm just one of the out-of-focus guys. Gold Supporting Member

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  10. David Jayne

    David Jayne

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    Which it almost certainly is.
     
  11. rojo412

    rojo412 MARK IT ZERO! Supporting Member

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    Here's a link to the manual/spec sheet

    I was on parts express and found a 50w attenuator and a 100w attenuator in 16ohm, but that was it. Are those too powerful for this? You said 15-20% rating of the whole speaker (which is 100w)?
     
  12. sconix

    sconix Supporting Member

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