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Thread: Projects in Rummelland

  1. #1
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    Projects in Rummelland

    Hello folks, old members, veterans, experts and specalists,
    my name, as the nick may tell, is Roger.
    I've been reading in this forum for years, registered quiet new and this is my first post. (hurra)

    Thx to all giving information and knowledge to everybody, sharing the thoughts, defeats, failures and secrets, gathered in the search for good listening to reproduced music.
    Great accomplishment to you.

    I'm building boxes and planting speakers in those for years.
    It happend to come that some speakers in those boxes are JBL
    and this fact made me finally end up here.
    There are some questions I will place later, hoping for answers and further support.

    If your asking yourself about Rummelland, its a german saying for a messie place/land were a lot of stuff is in progress or delay, to keep it in a friendly term. (There is an hidden information in the last sentence that may hopefully explaine my wrong writting and odd appering humor.)



    My first question is:
    how do I get the order of posts in a thread turned that the first on page one
    is not the latest answer and the last page the first question?
    Its a pain in the brain when your reading trough it all, getting the language and
    the said state itself but the context is weired in total. Took me some time to realize.
    Pls help me out of this. Thx

  2. #2
    Administrator Mr. Widget's Avatar
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    Welcome aboard!

    Go here: http://www.audioheritage.org/vbullet...b3_board_usage

    Click on the highlighted link in this image.


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    Thanks for the information and guide, now I got it in a good working order for me.

    Trying to get you a picture of my loudspeaker, its probably to big.
    Its a 2241 reconed to 2245H in the back behind the curtain closed box 250liter.
    A 2202 with a Fostex FD600 at the 2344 and a Cabasse TW5 as a tweeter on top in the front boxes.
    Tried some different drivers like 2426 at the horn and the 2402 and 2405 as tweeters
    but I prefer the others better.
    Its partly aktiv, the bass got a seperate amp like the front wich got an oldstyle X-over.
    X-over bass to front is done by dsp, also the room alingment for the bass and delay to front.
    Hope you enjoy.

    sry for two pics, coudnt delete the secend

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    Administrator Mr. Widget's Avatar
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    Very cool! Do you have a photo with the Cabasse tweeter installed.


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    Its the one on top in the middle.
    Cabasse pro is great stuff.

    Also had a diy ribbon instead of the 2344 but the beam in horizontal is nothing for a livingroom. The clearity was amazing, maybe gonna try the ribbon on the two pieced 2344 or get later back to do some experiments with it. Or build a smaller one for SHT.

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    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by rogerjulien View Post
    Its the one on top in the middle.
    Cabasse pro is great stuff.
    The way it is placed there at an oblique angle I assumed it was disconnected.


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    Hello,


    does somebody know if the JBL 2202 was mounted in another loudspeaker than the 4350/55?
    Did anybody run it deeper than the 290Hz of the 4355? Use it in another enclosure?
    Who else is using it in a diy setup?

    Just mounted some new Subs and those new ones dont want to play to high.

    I could just press and bend the 2202 to were I need it while its on dsp
    but I want to understand or see how and why.

    150 - 200 Hz is my target x-over.


    Thanks
    looking for a JBL 2346 horn

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    Not to be Critical.
    But i hope 2241 was a typo, and you ment to Write 2240 reconed to a 2245.

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    Senior Member jbl4ever's Avatar
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    Used in the 4512 in the same bandwidth you are looking for. Not much info though on this model

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    @FE3T: Your right, its meant to say "2240 to 2245". Thanks for the correct input.

    @JBL4ever: Thanks you, I never knew about the 4512.

    But looking at that design I'd rather go with a sealed enclosure.
    Right now its about 45-50 liters like the housing in the 4355.
    That turns out to a Qtc of 0,3 and a f-3 of 270Hz.
    If I get it in 10-15 liters there will be Qtc 0,5 and f-3 225Hz.

    That is far less volume with little encrease, is it worth it? Any suggestions?

    The JBL 2206 might look better for the target x-over but I got the 2202 and like it.
    looking for a JBL 2346 horn

  11. #11
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    Quote Originally Posted by rogerjulien View Post
    @FE3T: Your right, its meant to say "2240 to 2245". Thanks for the correct input.
    Good to know, i was a bit worried that you actually had installed a C8R2245 cone kit in a 2241 basket
    Wich migth actually be possible, but would render the completed driver useless for any purpose.

  12. #12
    Administrator Mr. Widget's Avatar
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    To answer your original question, you can use the 2202 down to 150 Hz if you give it enough digital encouragement. This will likely limit your maximum SPL… But that is pretty high already so unless you’re a real power freak you should be OK.


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    Thanks for help.

    I will give the 2202 both, a lowshelf and a smaller housing.
    X-over is now at 170Hz.
    Even when playing loud it seems no problem, the cone isnt moving that much.
    looking for a JBL 2346 horn

  14. #14
    Senior Member gibber's Avatar
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    Welcome to this forum Roger !

    Did you try 2123’s or 2012’s for mid also?

    Your Cabasse tweeter looks a bit like a Yamaha JA-42xx bullet tweeter in that picture.
    What is the Cabasse model #? — would like to look up some details

  15. #15
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    Hello,


    never heard the 2123,
    had the 2012 in a backloaded horn with a diy ribbon on top.
    Mad a decent bass all through the neighborhood,
    played house and lounge music for the folks around.
    Tryied the 2012 in closed box later, keeping that driver in the shelf.

    The Cabasse is a TW5, disconnected at the time.
    Got some new subs and the balance of sound changed.
    Cabasse is some serious stuff.


    gimme a call if you feel like
    looking for a JBL 2346 horn

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