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Thread: Upgrading DIY JBLs?

  1. #16
    Senior Member martin2395's Avatar
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    Sadly, I don't think I can replace the 075's with a midbass, the 4355 has a 12 inch mid, does it? If so it won't fit there for sure.
    However I may try to place it like mids in the 4312 but then with two woofers.

    Changing the 2445 to something else that can go from 300Hz would be the easiest, though I'm unsure how it would sound with the 2395.

    p.s
    I can have a pair of 2204H's for €160, would it be an improvement?

  2. #17
    Heather [Senorita member] hjames's Avatar
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    Why not try a 10 inch mid-bass like the 2121, 2122 or 2123?
    You can leave the woofers on the low bass ... bring the mid bass in from,
    say 300 to 1200, and let the horn driver start there.
    Sell the bullets and get a 2405 supertweeter and get one of Lee's aluminum mounts
    to float the slot tweeter above the slant lens ...


    Quote Originally Posted by martin2395 View Post
    Sadly, I don't think I can replace the 075's with a midbass, the 4355 has a 12 inch mid, does it? If so it won't fit there for sure.
    However I may try to place it like mids in the 4312 but then with two woofers.

    Changing the 2445 to something else that can go from 300Hz would be the easiest, though I'm unsure how it would sound with the 2395.

    p.s
    I can have a pair of 2204H's for €160, would it be an improvement?
    2ch - Oppo981, JoLida502, JBL L200+, KEF 105.4
    HT7- XDA-2, BDP93, 4b NRB, B&K 5ch amp, Vandy 3A, 2Ce, VCC1, TF600 & JBL 4641

  3. #18
    Senior Member martin2395's Avatar
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    I have found something like 2123H's, these are 10 inch and will probably fit with ease. I'm only unsure about their price, €250 for a pair...
    The description is not correct as there are no 2321's , so this must be 2123H's.
    Here's the link: http://link.marktplaats.nl/553413948

  4. #19
    Senior Member Odd's Avatar
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    Quote Originally Posted by martin2395 View Post
    I have found something like 2123H's, these are 10 inch and will probably fit with ease. I'm only unsure about their price, €250 for a pair...
    The description is not correct as there are no 2321's , so this must be 2123H's.
    Here's the link: http://link.marktplaats.nl/553413948

    2123h will be right for you. The two you linked to does not look good. Keep an eye on eBay.com and eBay.de They are often for sale. In the U.S. approximately $ 100, - each.

  5. #20
    Senior Member martin2395's Avatar
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    Can you tell me what's wrong with them? He has 12 of them available and 4 have been recently reconed.

    by the way, when I'm back home, I will try putting the 2395 higher so the 075's can fit directly under, I'm very curious how it will sound.

  6. #21
    Heather [Senorita member] hjames's Avatar
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    Quote Originally Posted by martin2395 View Post
    Can you tell me what's wrong with them? He has 12 of them available and 4 have been recently reconed.

    by the way, when I'm back home, I will try putting the 2395 higher so the 075's can fit directly under, I'm very curious how it will sound.
    If the pix below are the speakers you are referring to, they appear to have accordian surrounds.

    The 2122 and 2123 speakers I have seen have foam surrounds -
    my guess would be the advertised speakers have greatly different specs.

    Take a look at the comparison picture we got from Subwoof in this thread from a few years ago ...



    You can scroll to the bottom of the page listed here to see all the images and specs in the matrix.

    http://www.audioheritage.org/vbullet...122-2123/page2



    Compare them to the Image I grabbed from the ad you linked to



    Name:  2321H.JPG
Views: 457
Size:  47.0 KB
    2ch - Oppo981, JoLida502, JBL L200+, KEF 105.4
    HT7- XDA-2, BDP93, 4b NRB, B&K 5ch amp, Vandy 3A, 2Ce, VCC1, TF600 & JBL 4641

  7. #22
    Senior Member Odd's Avatar
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    Quote Originally Posted by martin2395 View Post
    Can you tell me what's wrong with them? He has 12 of them available and 4 have been recently reconed.

    by the way, when I'm back home, I will try putting the 2395 higher so the 075's can fit directly under, I'm very curious how it will sound.

    Perhaps they are right?

    Name:  Bilde 2123.jpg
Views: 466
Size:  124.6 KB

  8. #23
    Senior Member 1audiohack's Avatar
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    Post 22 looks like a proper 2123. The pic at the bottom of post 21 looks to be an E110 with at best, an incorrect dust cap and black painted, but more likely an aftermarket E110 cone kit with a less than stellar glue job.

    E110's have very short voice coils and VERY thin cones, like 0.022" thick, the 2123 has a longer coil and thicker cone. We're it me, it would be a proper 2123.

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

  9. #24
    Senior Member martin2395's Avatar
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    I have repositioned the 2395's to make some place for the tweeters:


  10. #25
    Heather [Senorita member] hjames's Avatar
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    Check this thread for Lee's aluminum mounting brackets

    The H stands for the horn/lens combo
    http://www.audioheritage.org/vbullet...luminum-repros



    or the L bracket for the slot tweeters
    http://www.audioheritage.org/vbulletin/showthread.php?29920-Stainless-steel-brackets-for-2402-2404-2405&p=300397&viewfull=1#post300397

    2ch - Oppo981, JoLida502, JBL L200+, KEF 105.4
    HT7- XDA-2, BDP93, 4b NRB, B&K 5ch amp, Vandy 3A, 2Ce, VCC1, TF600 & JBL 4641

  11. #26
    Senior Member martin2395's Avatar
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    They look really cool!
    Btw, what do you think, are they placed right, or should I move them further to the front? At this moment they are about 5cm from the edge:


    I must admit that I like that industrial style of the original brackets, pity that someone cut a part off the right one

  12. #27
    Heather [Senorita member] hjames's Avatar
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    Well, you could time-align them by positioning the drivers so the diaphragms are in the same vertical plane ...
    but I think you'd need the bullets to be on top of the horn driver,
    or else the lens would shroud them and block their dispersion to some degree ...


    Quote Originally Posted by martin2395 View Post
    They look really cool!
    Btw, what do you think, are they placed right, or should I move them further to the front?
    At this moment they are about 5cm from the edge:


    I must admit that I like that industrial style of the original brackets, pity that someone cut a part off the right one
    2ch - Oppo981, JoLida502, JBL L200+, KEF 105.4
    HT7- XDA-2, BDP93, 4b NRB, B&K 5ch amp, Vandy 3A, 2Ce, VCC1, TF600 & JBL 4641

  13. #28
    Senior Member Lee in Montreal's Avatar
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    Knowing the speed of sound is 344m/s, measure the distance between the 2402 and the 2445 (distance between diaphragms. Divide this distance by 344 and you shall know by how much time you should delay the tweeters to time align them with the 2445. Then it is only a mater of precise tweaking from your seat. Works the same with the woofers.

    If, per exemple the tweeters are 0.390m ahead of the 2445, then 0.390m divided by 344m/s = 1.133720930233e-03s or 1.13 millisecond delay. Your CX3400 has up to 2 millsecond delay. So you are golden.

  14. #29
    Senior Member Lee in Montreal's Avatar
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    Quote Originally Posted by martin2395 View Post
    I must admit that I like that industrial style of the original brackets, pity that someone cut a part off the right one
    Hmmm... I make aluminum repros. Or I can sell that single iron stand for $75.00cad

    http://www.audioheritage.org/vbullet...luminum-repros

  15. #30
    Senior Member martin2395's Avatar
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    Thank you Lee!
    I have sold the CX3400 and ordered the DCX2496 which should be even better as everything can be set more precisely.
    The only reason I moved the tweeters is to make place for a midwoofer.

    I will give them a listen when the DCX arrives

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