JBL L100 Parts and Repair

The JBL L100 series speaker was the consumer version of the popular 4400 Series Studio Monitors. It remains one of the most popular speakers due to sturdy construction and high quality components which combined to produce great sound. It was so popular that  a number of different versions made. Here are the parts details: new component and repair parts availability.

L100 Century: LE20-1 tweeter repaired with the D8RLE20 diaphragm, LE5-2 midrange (which is no longer available) and uses the C8RLE52 recone kit, and the 123A-1 woofer (which is no longer available) -C8R2212 accordion edge recone kit.
L100A Century: LE25 tweeter repaired with the D8RLE25 diaphragm, LE5-2 midrange which uses the C8RLE52 recone kit, and the 123A-1 woofer (which is no longer available) –C8R2212 accordion edge recone kit.
L100A Century (Late Model): LE25 tweeter repaired with the D8RLE25 diaphragm, LE5-2 midrange which uses the C8RLE52 recone kit, and the 123A-3 (which is no longer available) –C8R2213 recone kit with accordion edge.
L100T: 035Ti tweeter- (no replacement tweeter and no diaphragm for repair), the 104H-2 midrange and the C8R104H-2 recone kit, and the 2214H wooferC8R2214 recone kit or RFK12 JBL2214 refoam kit
L100T3: 035TIA tweeter which can be repaired with the D8R035TIA diaphragm, the 104H-2 midrange and the C8R104H-2 recone kit, and the 2214H wooferC8R2214 recone kit or RFK12 JBL2214 refoam kit
 
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14 thoughts on “JBL L100 Parts and Repair

    • Cathy Satin says:

      It is very typical for the foam surround to dry rot. This dry rot also occurs on butyl rubber surround speakers. Depending on where you are in the world and the environmental exposure your speakers experience, you can expect this to happen every 5-20 years. You can change the cone to an accordion edge surround or an all paper surround but you will sacrifice low frequency response. The speaker cabinets were tuned for this type of speaker and surround so I say just repair them as needed. You can send them to us for us to refoam or recone or we sell do-it-yourself parts as well. Contact us at info@speakerex.com for more info.

  1. Steven Wright says:

    I have a set set of 1976 vintage JBL 100’s. I am currently making new cabinets using the old boxes as templates. When replacing the fiberglas insulation on the back and sides, what do you recommend

  2. Steven Wright says:

    Thank you for your prompt and informative reply about the insulation for my JBL 100’s. I forgot to take a picture of the front of the speaker when I disassembled them. I can’t remember if the posts that mount the grilles were in the cabinet fronts or in the grilles. Which way should they go?
    Thank you in advance.
    Steve

  3. Carey Stout says:

    I am looking for a pair of foam inserts for a pair of JBL L100″s I can’t afford what their asking for the whole grill on E-Bay I just want a pair of foam inserts I have a new grill kit already !
    Can you tell me where I could purchase a pair, not eBay

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