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Thread: Upgrading DIY JBLs?

  1. #31
    Senior Member Lee in Montreal's Avatar
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    Quote Originally Posted by martin2395 View Post
    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.
    Hi Martin

    A friend of mine, Eaulive, who's also a member here, and myself have purchased a pair of empty 4520 at the same time from the same guy. But we developped our systems in different ways.

    I have a three way and Eaulive has a four way. The difference being he has a 12" B&C midbass and I can attest that it makes a huge difference in vocals and snares. Therefore I will also add a mid bass 12" front horn loaded cabs when I find good ones.

  2. #32
    Senior Member martin2395's Avatar
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    I wil add there an extra midbass speaker, though i think it will have to be an 8 inch

    If I only haven't sold my EV VMR's a few months ago!

  3. #33
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    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.
    You will have to replace the 2395 with bigger horns, like these:

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  4. #34
    Super Moderator yggdrasil's Avatar
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    Quote Originally Posted by martin2395 View Post
    Do you think it will be a good idea to let the 2445J go so high?
    The 2445's go there. Not sure about your horns and beaming. With active and adjustable crossovers it is easy to try.

    Johnny

  5. #35
    Senior Member martin2395's Avatar
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    I decided to buy a pair of new mids, as most of the second hand JBL's that come up on Marktplaats have been abused and badly reconed. Yes I know that this maybe sounds stupid but...is it bad if it says "good/optimized" for guitar? I saw this by a lot of 10 inch drivers such as Eminence Delta or Gamma.

  6. #36
    Senior Member Lee in Montreal's Avatar
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    Time to find a proper design for a front horn loaded cabinet.

  7. #37
    Senior Member martin2395's Avatar
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    Let me guess....they are HUGE?

  8. #38
    Senior Member Lee in Montreal's Avatar
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    Quote Originally Posted by martin2395 View Post
    Let me guess....they are HUGE?
    A front horn loaded cabinet for a 10" driver will perhaps be only 13" tall x width of your current bass bin. Not that bad. And they are not very difficult to build. Nothing that can't be done in a day. Your mids and tweeters are high efficiency, and you need the front horn of that new cabinet to help you raise the acoustic efficiency.

    Have a peek at Eaulive's album

    http://www.flickr.com/photos/eaulive...4894/lightbox/

  9. #39
    Senior Member martin2395's Avatar
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    I understood you wrong, I thought you meant a complete front loaded horn cabs like Eaulive's 4520's as these would never fit to my room

    By the way, do you have any recommendations for 10 inch midwoofers, except old JBL units?

  10. #40
    Senior Member Lee in Montreal's Avatar
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    Maybe the usual B&C or Eminence Could as well pick up a pair of 12"

    http://www.parts-express.com/pe/show...number=294-660

  11. #41
    Senior Member martin2395's Avatar
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    Hello Lee,

    Would placing the midwoofer there where the 075's were be very wrong? I mean, I sit about 3.5-4m from the speakers and while the room is 2.3m high I think that it may sound "strange" with midwoofers placed so high. My room is quite small and that's why I try to keep the units close to each other

  12. #42
    Senior Member Odd's Avatar
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    You have most of the parts for a 43xx monitor. Be patient and wait for two 2123h/2121h/2122h. Sell ​​the 2395 lenses, and buy something that fits better in smaller rooms. Use only one 075 or purchase a 077/2405. Read posts about 4343,4345,4355. Once you have all the components will possibly someone on this forum help you with a 3-way crossover for the HF section.

    4343
    4345
    4345

    Search in LHF with Google, it's better than the forum search.

  13. #43
    Senior Member martin2395's Avatar
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    Most of the parts? As far as I know none of the units I currently own was used in the 43xx series

  14. #44
    Heather [Senorita member] hjames's Avatar
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    Quote Originally Posted by martin2395 View Post
    Most of the parts? As far as I know none of the units I currently own was used in the 43xx series
    Of course not, but if you are working a DIY system, look at the parts list for successful commercial/Pro models to see what you approach.
    Why not emulate something successful?

    I cranked my L200s into 4333 territory with a crossover upgrade and adding 2405 slot drivers ...
    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

  15. #45
    Senior Member jbl4ever's Avatar
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    You can check into 2404 tweeters. If you want to keep your cabinet these should fit the baffle.

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