Can anyone identify this speaker? (g12-65?)

Discussion in 'Amps and Cabs' started by griley, Feb 4, 2008.


  1. griley

    griley Member

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    I've just picked up an old marshall jcm800 1937 bass 2x12. I've read before that these came loaded with G12-65's. When I opened up the cab to take a look I was surprised to find that the speakers are labeled differently;

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    The G12-65 is labeled T3101, 444 cone, date code 26 march 1980.
    The Marshall also has T3101, 444 cone, date code 15 feb 1980.
    The speakers look the same except for the labels.
    Is this speaker just a G12-65 in disguise?

    Any info would be appreciated.
    Cheers, George
     
  2. jedistar

    jedistar Member

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    Am sure they are the same type. Options?

    1. It was made that way
    2. Left hand one blew up and was replaced ? warranty job soon after purchase hence very close date....

    The screws look a bit odd- some new some old ? has it been reassembled with old drivers???
     
  3. dunara

    dunara Member

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    They're both G12-65s, one supplied to Marshall with the appropriate label, the other an aftermarket model (a later replacement for a damaged unit, perhaps?). It it were mine, I'd run a meter across it to make sure its the right impedance (unless, of course it's written on the speaker.) IIRC, they were available in 8 or 16 ohm versions.
     
  4. AdmiralB

    AdmiralB Silver Supporting Member

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    Sounds like Celestion screwed up the labeling, or someone changed one of them.

    Celestion's T-numbers define specific speakers, down to the labeling. A Marshall-labeled G12-65 has a different T-number than the Celestion-labeled version.

    Since the T-numbers are the same, they're definitely the same speaker.
     
  5. martyhk0

    martyhk0 Member

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    They are both horrible speakers. Don't plug them in, they will explode. Send them to me and I will replace them with nice shiny new chinese speakers free of charge, lol!:)

    Seriously, don't sweat it. They are the same exact speaker just different labels (just check the resistance with an ohmmeter if you want to be sure of the ohms). Who cares how they wound up in there. The only thing different is the label!
    If you don't want them, you can easily sell them. Myself and many others who favor those speakers would be happy to pick up a nice pair.:AOK
     
  6. griley

    griley Member

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    cheers, guys. I thought that it probably was a g12-65 but was a bit confused by the different labels.
    They are the correct impedance (it says on the speakers and I checked it.)
    As they are the same speaker I guess that they are probably both original and just happen to from the time when marshall was changing from the marshall labels used in the 70's amps to the generic celestion labels that are usually in jcm800's.

    The cab sounds really good, it's quite dark due to the bass cones but I'm finding it works well with my 1987x reissue.
    Anyone else here use these bass G12-65's?
     
  7. dunara

    dunara Member

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    I presume you mean 15 OHMS, and 8 OHMS....:confused:
     
  8. AdmiralB

    AdmiralB Silver Supporting Member

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    From drtube.com:

    4104 JCM800, 50W 2x12" combo

    This amp is a 2x12" combo version of the 2204 head. Early models (1981 - 1983) were fitted with two Rola Celestion G12-65 T3054 or T3101 15Ω speakers but later models (1984+) were fitted with two Celestion G12M-70 15Ω speakers.


    And here's a thread on the PP board:

    http://www.vintageamps.com/plexiboard/viewtopic.php?t=5822&highlight=t3101

    Looks like they're bass-cone versions of the G12-65. Are the cones marked "444"?
     
  9. griley

    griley Member

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    Are you sure this is true of the 444 bass cone version?
     
  10. bosstone

    bosstone Member

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    You are correct sir. Thank you for the correction.
     
  11. bosstone

    bosstone Member

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    That is correct and agrees with what I said.
    The 1777 cones are the ones to have. 444 cones are bass cones.
     
  12. bosstone

    bosstone Member

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    Yes. There were no 8 ohm Marshall labeled Rola Celestion G12-65's, regardless of cones. There may have been other Marshall labeled, versions of other Celestion speakers with the 444 cone though.
     
  13. AdmiralB

    AdmiralB Silver Supporting Member

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    Not exactly. You also said this:


    ...here: http://thegearpage.net/board/showpost.php?p=2610713&postcount=6
     
  14. bosstone

    bosstone Member

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    There certainly are Rola Celestion G12-65's with bass cones (444). I don't know what I was thinking when I wrote that. I apologize for the error.

    Rola Celestion G12-65, 8 ohm = T3033
    Rola Celestion G12-65, 15 ohm = T3054
    Marshall labeled Rola Celestion G12-65, 15 ohm = T3120 (no 8 ohm version made)

    It appears that both the Rola Celestion G12-65 and the Marshall version or the Rola Celestion G12-65, 15 ohm speakers, when equipped with the 444 bass cone share the T3101 designation.

    Cone for guitar = 1777
    Bass cone = 444

    Rola Celestion G12-65 made speaker with the 1777 cones are much preferred for guitar.
     
  15. Mare

    Mare Member

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    I was looking for information about speakers for my cab Marshall JCM 800 Bass series and I run on this topic these days. I wanted to change them with G12T75.

    In my 1935B JCM 800 Bass series 4x12" cab there are four Celestion G12 - 65 speakers , but they have 1777 code on them. It should be code for guitar cones, right? I bought it used, 8 years ago. Explanation?

    Here, in my country, Serbia, price of Celestion G12-T75 is about 85 euros. They are making them in China nowdays.

    Price for G12-65 is about 160 euros.

    I wanted to change them, but now I'm not shure.

    I use Marshall 2203 JCM 800 Lead series 100w amp

    Please help, explaine, advice, sugestion?

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