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Thread: Rebirth of a JBL K120

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    Senior Member edgewound's Avatar
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    Rebirth of a JBL K120

    Recently, a customer bought a K120 from eBay for for his guitar amp. He had the seller ship it directly to me for a restoration. This K120 was previously reconed with aftermarket parts, which is not surprising. What follows is the transition from corrosive Eastern Seaboard life, to the glorious rebirth in sunny Southern California, awaiting it's new home to the Pacific Northwest.

    This was a labor of love. It wasn't free....But it deserved the Jim Lansing Heritage treatment. Hope you like it.


    Edgewound...JBL Pro Authorized...since 1988
    Upland Loudspeaker Service, Upland, CA

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    Senior Member edgewound's Avatar
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    Rebirth of a JBL K120 cont'd

    Check out the rust on the top plate...





    Edgewound...JBL Pro Authorized...since 1988
    Upland Loudspeaker Service, Upland, CA

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    Senior Member edgewound's Avatar
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    Rebirth of a JBL K120 cont'd

    Aftermarket parts exposed. The K120(C8RE120 is the OEM recone kit) has an edgewound aluminum wire voice coil on a much lighter former. Silly me didn't take a pic of the new C8RE120 before installation....You'll just have to trust me on this.


    You can see here that the aluminum dome was removed...althought not thoroughly...and replaced with a paper dome.


    Top plate/motor assembly after rust removal and repaint with wrinkle finish. Magnet was also recharged back to 12,000 gauss. It was down to the mid 9k.


    Edgewound...JBL Pro Authorized...since 1988
    Upland Loudspeaker Service, Upland, CA

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    Senior Member edgewound's Avatar
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    Rebirth of a JBL K120 cont'd

    12" frame after strip and repaint.

    Edgewound...JBL Pro Authorized...since 1988
    Upland Loudspeaker Service, Upland, CA

  5. #5
    Senior Member edgewound's Avatar
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    Rebirth of a JBL K120 cont'd

    The finished reincarnation...Ready to rock again for another couple of decades+ with proper use...This went to a very good home to be enjoyed by a great guitar player.





    Edgewound...JBL Pro Authorized...since 1988
    Upland Loudspeaker Service, Upland, CA

  6. #6
    Senior Member timc's Avatar
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    Superior work!........ As usual
    2213 + 2435HPL w/aquaplas + H9800 (Matsj edition)

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    Senior Member 1audiohack's Avatar
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    Well that couldn't look any nicer my friend. You're indeed an artist.

    All the best.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  8. #8
    Senior Member edgewound's Avatar
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    C*RE120 recone kit...Available in 8 or 16 ohms.

    Thanks, Gentlemen...

    Some things just NEED to preserved.
    I found a photo of an OEM C8RE120 from a previous job:

    Edgewound...JBL Pro Authorized...since 1988
    Upland Loudspeaker Service, Upland, CA

  9. #9
    Obviously... not a golfer grumpy's Avatar
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    Nice storyboard would be great if more "basket cases"
    were treated so well.
    It's uh... uh... it's down there somewhere, let me take another look...

  10. #10
    Senior Member SMKSoundPro's Avatar
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    Great job! and thank you for posting it!!!

    I reconed 4 EV-18B's and 2 2241s yesterday. And I gotta tell you, after holding both in my hands, I just wondered WHY anyone would use the EV drivers in subs!
    Oh well, a job is a job. Just recone it and let the end user listen to it!
    Your work ethic is obviously top notch Ken, and I am glad to call you friend!

    Great Job!!!

    Scotty.

    ps. What amp or cabinet is it going into? Pro Reverb? Mesa?... Help me to understand what GTR players like, besides employment. (Pizza...family of four...you know the joke!)
    One step above: "Two Tin Cans and a String!"
    Longtime Alaskan Low-Fi Guy - E=MC▓ ▒3db

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    Ken did a great job on my speaker! Cool to see that its re-birth is now immortalized!
    This speaker sounds so great! People say JBLs sound bad with overdrive pedals. No way, it sounds killer...A Fender Blackface /Silverface style amplifier, with, perhaps, a tube screamer and a speaker like this: OMG !!!

  12. #12
    Senior Member jcrobso's Avatar
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    WOW treffic job!

    It is easy to see that you love JBL speakers and each you do is a work of art!
    If you can remain calm in a crises, you don't understand the situation!

  13. #13
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    Quote Originally Posted by pula58 View Post
    Ken did a great job on my speaker! Cool to see that its re-birth is now immortalized!
    This speaker sounds so great! People say JBLs sound bad with overdrive pedals. No way, it sounds killer...A Fender Blackface /Silverface style amplifier, with, perhaps, a tube screamer and a speaker like this: OMG !!!
    He's done a couple for me, and they are simply beautiful.

    When you see some of the hack jobs that guys post pics of compared to the real deal, it's just amazing.

  14. #14
    Senior Member richluvsound's Avatar
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    Wow !

    Beautiful work Ken , the customer got a real bargain in the final result !

    Rich

  15. #15
    Senior Member edgewound's Avatar
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    Quote Originally Posted by richluvsound View Post
    Beautiful work Ken , the customer got a real bargain in the final result !

    Rich
    Thanks very much, Rich. Coming from a craftsman like yourself, that's pretty high praise.

    I appreciate all the appreciation, everyone. I hope our society turns back around into a domestic manufacturing powerhouse for the masses again.

    There are many businesses that really care about what they do, and most are small shops. If the Corporate American bean counters would wake up to that fact we'd all have a decent income to grease the wheels of commerce and roads without wheel-breaking potholes.

    Thanks again!!
    Edgewound...JBL Pro Authorized...since 1988
    Upland Loudspeaker Service, Upland, CA

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