Need Help Identifying Speaker

Discussion in 'Amp Central Station' started by Gazza74, Sep 26, 2021.

  1. Gazza74

    Gazza74 TDPRI Member

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    I am struggling to identify the exact specs of my 8" celestion speaker. I got this in a deal on Ebay but the previous owner didn't have much info either. The speaker measures in at 3.2ohms and I cant tell if its an alnico or ceramic. I've tried all of the celestion decoder sites but cant identify this thing. Any help would be greatly appreciated.


    image0.jpeg image1.jpeg image2.jpeg image3.jpeg image4.jpeg image5.jpeg
     
  2. Wally

    Wally Telefied Ad Free Member

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    I am going to think that is a ceramic magnet. It is a bit large for an Alnico on such a small speaker, ime. Other than that, power handling is a guess. What diameter is the voice coil?
     
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  3. SnidelyWhiplash

    SnidelyWhiplash Friend of Leo's

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    Excellent find. I'd be very careful with usage. What shape is the cone in? Any rips or tears?
     
  4. Gazza74

    Gazza74 TDPRI Member

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    Voiver
    Voice coil diameter is 1.160"
     
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  5. Gazza74

    Gazza74 TDPRI Member

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    Voice Coil is 1.160" in diameter. The cone is like new condition. No signs of wear or damage.
     
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  6. Dacious

    Dacious Doctor of Teleocity

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    3.2 ohms and a ceramic magnet suggests it's a solid state amp 4ohm nominal impedance.

    Celestion does make 4 ohm speakers for Marshall and other amps like the AVT series, MGs, acoustic amps.

    That is a really old 60s-70s logo stamped into it so I'm betting it's some sort of practice amp. Maybe 10 watts due to basket shape.

    Could work ok for a Champ.
     
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  7. Gazza74

    Gazza74 TDPRI Member

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    Thanks, Its going in a 5F2-A Princeton. Fingers crossed.
     
  8. Dacious

    Dacious Doctor of Teleocity

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    Should be OK physically. I can't say it's going to sound great but it should at least sound ok. It may be a full range speaker intended for a stereo cabinet or bench radio. It may sound great.

    Probably not that efficient but probably not that different than the original speaker which would have been selected because of price and availability.
     
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  9. Gazza74

    Gazza74 TDPRI Member

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    That's why I bought it TBO. The seller couldn't identify it and the price was right. It didn't look like your average ceramic speaker. I was hoping it was alnico! So, I took a chance. I will try it out once I finish this amp build. If it doesn't stack up will sell. Thanks again!
     
  10. King Fan

    King Fan Poster Extraordinaire Ad Free Member

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    The other factor you want to consider is smooth v. ribbed cone. Is yours smooth? Might work for vintage 5F2a, but as a simple summary, Weber says this: “… smooth cone for early breakup, low detail, low headroom, crunchy…. ribbed cone for later smoother breakup, higher detail, higher headroom.”
     
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  11. Wally

    Wally Telefied Ad Free Member

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    Considering the difference between smooth and ribbed cone speakers, I have wondered why some organ companies outfitted their organs with one of each? I have a set of Heppner Alnico 16 ohms here…one smooth, one ribbed. They are original cones with the cone codes having one digit different…the last digit. and….could there be the slightest bit of phasing effect going on when run as a pair to due the difference in the reaction of the cones????
     
  12. King Fan

    King Fan Poster Extraordinaire Ad Free Member

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    Maybe a distant cousin to mixing alnico and ceramic, before ceramic was a thing? :D
     
  13. Wally

    Wally Telefied Ad Free Member

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    maybe to a different if not greater effect?? I need a cab for these….
    I have other pairs of organ pulls that are not mixed….two sets of 12” Rolas that are all smooth cones.
     
  14. Gazza74

    Gazza74 TDPRI Member

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    Speaker.jpg
    This is the speaker.
     
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