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JBL L250 Questions

Discussion in 'General Audio Discussion' started by zebra03, Jun 12, 2018.

  1. zebra03

    zebra03 All Audio - NO BS

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    If you were to audition a pair of JBL L250's , what should you look for ? Weaknesses in any of the drivers ? How much Amp do you need to properly drive these guys ?
     

     

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  2. don philipe

    don philipe AK Subscriber Subscriber

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    You might try posting in the speaker forum,probably get more results.
     
  3. Cactus Bob

    Cactus Bob Desert Rat Subscriber

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    You really need 200 wpc + to wake them up but they will sound good with just about any amp 100 wpc up. I was driving a pair with my Marantz 2325 (125 wpc) a month ago and my 250ti's sounded great, normally I run 700 wpc.
     
  4. grey

    grey AK Subscriber Subscriber

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    Make sure you thoroughly check that you have the right drivers and oem cones. The health of the 108H would be the most important to me. The other parts can be up there in price and it may take a while for the part to come up for sale.

    I agree with the 200w + recommendation. Personally, a bit more volume and the larger 200w amplifier changed my thoughts on what they are capable of. It still seems that a little more would be good thing. The manual recommends 400 wpc max. and more power used responsibly is likely not bad either.

    I've tried a 150 wpc Marantz ST7 and it didn't do much for me. It never had a complete checkup and that may have been a factor.
     
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  5. Cactus Bob

    Cactus Bob Desert Rat Subscriber

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    I was running one Yamaha PC2002 (240 wpc) then added a second, bridged them @ 700 wpc and it really opened them up. One day I said to my self maybe I didn't need the second amp, I removed it and ran just the one amp again and they sounded very good but veiled comparatively.
     
    Last edited: Jun 12, 2018
  6. zebra03

    zebra03 All Audio - NO BS

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    I know this asking a lot , but does anyone have a picture of one with the correct drivers ?


    [​IMG]

    Is this correct ?
     

     

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  7. Cactus Bob

    Cactus Bob Desert Rat Subscriber

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    Edited:

    The holes for the grills are throwing me off but 250ti's have 6 holes for the frame and those have four and L250's don't have any so they must have drilled them to accommodate the grills. The L250's have a paper cone mid and the 250ti a polypropylene cone.
     
    Last edited: Jun 13, 2018
  8. Kilowatt915

    Kilowatt915 Active Member

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    I have L250s with the ti upgrades.
    They are the best speakers I've heard for all types of music.
    I would test the speakers with music that is well recorded and has a good amount of instruments. Maybe Steely AJA album or some kind of fusion jazz.
    Sound should be very precise, great imagery, bass is a little tight but not as tight as say the L100s. You're not gonna get the super lush sound of say ARs or older speakers.
    Put your ear close to the ultra high frequency driver (Top one) and see if it goes in and out (off and on).
    The ti upgrades have "ti" stamps in back of the drivers. send a picture of the crossover, the ti upgrades has larger components.
    The top high frequency driver looks suspect.
    Good Luck. Definitely great speakers.
     
  9. toddalin

    toddalin Super Member

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    [​IMG]
    [​IMG]
     
  10. grey

    grey AK Subscriber Subscriber

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    The drivers look correct with a paper cone mid le5-11.
     
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  11. 4-2-7

    4-2-7 Smart Ass Sponsor Subscriber

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    Yes

    They are the first L250 with a gold dome tweeter
    The small 3" mid looks correct and really thats the cheapest driver there and quite a few others will work and look alike.

    The woofer looks like it's never been reconed or they just did a very nice job.

    The cabinet is walnut and thats correct, however someone drilled holes for the grills. It might be as simple as the originals and someone use 3/8th dowl to hold them on.
     

     

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  12. 4-2-7

    4-2-7 Smart Ass Sponsor Subscriber

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    BTW I would just leave them alone and not do any mods. The speaker in the photo looks like it need nothing but music playing through it.
     
    Last edited: Jun 13, 2018
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  13. 4-2-7

    4-2-7 Smart Ass Sponsor Subscriber

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    In these photos you can see the latter use of Teak wood and the silver dome tweeter.

    page05.jpg page04.jpg
     
  14. z-adamson

    z-adamson Super Member

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    What exactly do you mean by "not as tight as the l100".
     
  15. zebra03

    zebra03 All Audio - NO BS

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  16. E-Stat

    E-Stat AK Subscriber Subscriber

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    Is your model different from this one using a 5" midrange? It seems to possess the same challenge as other models of its day pushing that driver to a too-high crossover point (5.2 khz or a 2.6" wavelength) compromising its directivity up top.

    The brochure included polar response curves, but notably absent is one at the crossover point. Sure, a 5 incher does just fine at 2 khz (about where the LSR6332 crosses today), just not an octave+ above.
     

     

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  17. 4-2-7

    4-2-7 Smart Ass Sponsor Subscriber

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    What does your question have to do with this thread? and the questions in the OP?
     
  18. E-Stat

    E-Stat AK Subscriber Subscriber

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    If the unit is a 3 incher, it would appear to not be standard.
     
  19. 4-2-7

    4-2-7 Smart Ass Sponsor Subscriber

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    Sorry I didn't break out a tape mesure, but now I did. The paper cone is 3 and 1/4 inches, the cone and surround is 3 and 3/4 inch, the frame from flat side to flat side is 4 and 1/2 inches, the frame from mounting point ends is 5 and 1/8. I think my description is closer than JBLs.
     
  20. E-Stat

    E-Stat AK Subscriber Subscriber

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    That is typically how drivers are measured. Piston size is usually about an inch smaller.
     

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