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Thread: JBL 2123H in a two way speaker

  1. #1
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    JBL 2123H in a two way speaker

    Hi, I have a pair of unused tweeter JBL 2403h and I'd like to realize a compact two way speaker to combine with a subwoofer. What JBL woofer/mid woofer, old or new, can I use?
    Giuseppe

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    Administrator Robh3606's Avatar
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    Hello

    It's doable but you will be limited to about 100hz so you are going to need a subwoofer. Look up the 4716

    Rob
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    Senior Member grumpy's Avatar
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    ... and play that 10" driver up pretty high (~3.5-5kHz) or risk blowing up the 2403 (90º horiz)... which is much, much higher than a 10" driver should be used regarding matching off-axis response at crossover.

    http://www.acousticfrontiers.com/spe...iver-diameter/

    Not really seeing this as an optimal 2-way project (opinion).

    Also not saying it can't be done... speaker makers have certainly sold 10" two-way systems that stretched driver capabilities... say the old Infinity Qa... but even that was crossed over at 2500kHz. More typical is closer to 1kHz (say the Advent).

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    Senior Member jbl4ever's Avatar
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    The JBL E/K 110's will get up higher in frequency but with the rising response will need EQing.
    A couple of years back I heard some 2155H's which would work but they are 15's. The person used the JBL 2404H's for the tweeters and a sub below 100Hz
    http://www.jblproservice.com/pdf/Dis...dels/2155H.pdf

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    I did a mistake in the title of this thread, I wrote "JBL 2123H in a two way speaker" but the right form is "JBL 2403H in a two way speaker". Every time I think to sell these tweeters but I would not like to repent and then I close the closet where I keep them. In fact, what I'd like to know is if is there a small JBL woofer that goes up in frequency, my two subwoofers think about the bass frequecies.

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    I don’t know all JBL woofers new, old or vintage, I see on Eminence catalogue Woofer Alpha10-A or Eighteen Sound - Professional loudspeakers 8NMB420/8NW650/10W500/10W650 (4 differet woofers) or Dayton Audio 10"/8" woofers, the most compatible for my project. What do you think about? I prefer JBL components but …

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    On Holidays Ian Mackenzie's Avatar
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    Have a look at these threads for guidance.

    A better approach would be to consider the L220/L222 components and crossover schematic.

    The 2123H will beam tightly above 2500 hertz and cone breakup behaviour will become an issue.

    A LE5-9 or LE5-10 is a better choice when used with the Jbl L220/L222 network from 800-5000 hertz with a LE14 woofer below it. The Jbl design is already done so why screw up the application of the HF driver?



    http://www.audioheritage.org/vbullet...et-on-076-2403

    http://www.audioheritage.org/vbullet...or-Comparisons


    http://www.audioheritage.org/vbullet...requence-range

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    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by audiophile.1963 View Post
    I did a mistake in the title of this thread, I wrote "JBL 2123H in a two way speaker" but the right form is "JBL 2403H in a two way speaker". Every time I think to sell these tweeters but I would not like to repent and then I close the closet where I keep them. In fact, what I'd like to know is if is there a small JBL woofer that goes up in frequency, my two subwoofers think about the bass frequecies.
    Since the 2403 is really designed to be crossed over at 5KHz or higher, that limits things significantly. If you want to stay with JBL, I'd suggest the LE8T or the slightly more modern ferrite version.

    If you are open to other brands, look for a "full range" speaker with a small cone diameter, certainly no larger than 8".
    Good luck, and keep us posted!


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