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Thread: plans to build a box

  1. #1
    Klaus
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    Talking plans to build a box

    please can someone give me information (plans) to build a box with the following loudspeakers
    JBL 2235 H
    http://www.jblpro.com/pages/components/2235h.htm
    JBL 2118 J
    http://www.jblpro.com/pub/obsolete/2118.pdf
    JBL 2404 H
    http://www.jblpro.com/pages/pub/components/2404.pdf
    recommended box sice, crossover.
    Thank you very much. This is a great forum.

    Klaus Q.

  2. #2
    Senior Seņor boputnam's Avatar
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    Hey, Klaus...

    Are you making a three-way or four-way?

    There are some baffle and enclosure plans for three-way here: JBL Enclosure and Baffle Plans - Link - look for both the 5ft3 and 8ft3 of each, for "Home" (vs Instrument/Music). Each discuss baffles for the 130A, 136A, D130 and LE15A - so they are sized for a single 15-in LF (and PR in case of 8 ft3 box).

    But, you should run some models in something like BassBoxPro or WinISD to ensure these box volumes work for your project. And, make sure the baffle cuts are sized right for the transducer assemblage you are going with.
    Last edited by boputnam; 09-03-2003 at 03:25 PM.
    bo

    "Indeed, not!!"

  3. #3
    Administrator Mr. Widget's Avatar
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    Here is info for the woofer:

    http://www.jblpro.com/pub/manuals/enclgde.pdf

    Put the mid in a sealed box or better yet Sonotube with a 0.5 cu ft volume.

    Center the tweeter over the mid and you are done. It can be done easily in a weekend!

  4. #4
    Obsolete
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    Re: plans to build a box

    Looks suspiciously like a Ron Gold design


    *****


    http://www.goldsound.net/kit11.htm

  5. #5
    Klaus
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    plans for box

    Thanks bo, Mr. Widget and Giskard for your help.

    What would be better a activ or a passiv crossover. And which kind of amp do you recommend. Sorry for my bad english....
    What is the meaning of LF .... and ....PR?

    And bo "Are you making a three-way or four-way? ".
    I have these three speakers how could i make a four way?

    Thanks

    Klaus

  6. #6
    Senior Seņor boputnam's Avatar
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    Re: plans for box

    Originally posted by Klaus
    1. What would be better a activ or a passiv crossover.
    2. And which kind of amp do you recommend.
    3. What is the meaning of LF .... and ....PR?

    4. And bo "Are you making a three-way or four-way? ".
    I have these three speakers how could i make a four way?
    In order...

    1. I thought about that last night. Since we now know it's three-way system , the N65 might work, but you'd better await input from Giskard - he models networks much more efficiently (and correctly ) than I...

    2. I going to duck that.

    3. LF = Low Frequency (woofer); PR = Passive Radiator

    4. Well, you never said you only had one of each! So, I was hoping you had 2x 2235's for each cabinet, and were embarking on a Large Format Studio Monitor build. THAT would be cool...
    bo

    "Indeed, not!!"

  7. #7
    Webmaster Don McRitchie's Avatar
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    Re: Re: plans to build a box

    Originally posted by Giskard
    [B]Looks suspiciously like a Ron Gold design
    Giskard

    I'm curious if you know the background of Goldsound. For years they were listed in the annual Stereo Review and Audio equipment directories with their JBL kits. I mailed them a number of times asking for pricing and kit details and never got a single response.
    Regards

    Don McRitchie

  8. #8
    Klaus
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    Hey bo

    i have two K140 reconed as 2235H from 1986.

    Two 2235 per cabinet would give me that "earthquake like bass feeling " and would be "cool" too o.k.........

    By the way do you know the actual price of an new 2235 H and could i combine the K140 reconed as 2235H (from 1986) with an brandnew 2235 in one cabinet ?

    Thanks Klaus

  9. #9
    Senior Seņor boputnam's Avatar
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    Originally posted by Klaus
    By the way do you know the actual price of an new 2235 H and could i combine the K140 reconed as 2235H (from 1986) with an brandnew 2235 in one cabinet ?
    Regrettably, the 2235H is no longer offered. The 2234H is (US$275 ea), and I believe the only (and biggest) difference is it does not have the mass ring of the 2235H. You can search the Forum for some discussion on this. Here's the best Link: 2234H, 2235H, and Mass Controlling Rings - Link

    And YES you can combine the K140 reconed as 2235H into a cabinet with a 2235H (and I would think the 2234H) - just build a BIG cabinet, and put each LF in it's own subenclosure (MF, too!)! And then, invite us all over...

    Afterthought: Maybe you should buy a 2234H, and recone it with the D8R2235 kt and leave in the mass ring. Voilā ! A 2235!
    Last edited by boputnam; 09-04-2003 at 09:01 AM.
    bo

    "Indeed, not!!"

  10. #10
    Obsolete
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    "Regrettably, the 2235H is no longer offered."

    [size=large]I'M NOT DEAD YET!!![/size]

    JBL recently ran another batch of 2235H's. Get them here -
    http://www.jbl.com/home/product_supp...?prodId=B380TK

    It is conceivable these are finally the end of the line...
    Gotta happen sometime...

    Hi Don,

    "I'm curious if you the background of Goldsound. For years they were listed in the annual Stereo Review and Audio equipment directories with their JBL kits. I mailed them a number of times asking for pricing and kit details and never got a single response."

    Yeah, I know Ron Gold. I used to go over to his house back in the late 70's to see what he was up to. He worked out of his house back then. I have no clue as to why you never got a response.

    *****

    "And which kind of amp do you recommend."

    We're all pretty sure the PSSAudio amps are the only amps to buy
    Last edited by 4313B; 09-04-2003 at 09:39 AM.

  11. #11
    Senior Seņor boputnam's Avatar
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    Originally posted by Giskard
    JBL recently ran another batch of 2235H's. Get them here -
    http://www.jbl.com/home/product_supp...?prodId=B380TK
    Now THAT, is a very clever work-around, Giskard! My-oh-my.

    Here's how he/she did it, boys-and-girls.

    1. First, you must have an unequalled vast knowledge of JBL components and products. If "yes", proceed...
    2. Go to JBL Home Product Support
    3. Choose "B380" and then "Parts & Accessories", and hope the desired component is not "NOT AVAILABLE"

    I am so unworthy.... Very cool.
    bo

    "Indeed, not!!"

  12. #12
    Obsolete
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    "Here's how he/she did it, boys-and-girls."

    You're goofy!

    So I wanted to use her as my avatar! The short of it is - I'm not a drawing of a 4430 either
    Truth be known, I just wanted to look at her face every time I got on this forum

  13. #13
    Senior Member GordonW's Avatar
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    Re: Re: Re: plans to build a box

    Originally posted by Don McRitchie
    Giskard

    I'm curious if you the background of Goldsound. For years they were listed in the annual Stereo Review and Audio equipment directories with their JBL kits. I mailed them a number of times asking for pricing and kit details and never got a single response.
    Don, a friend of mine has pretty much every Gold Sound catalog between 1983-1990. If you would like them, I'll see about borrowing them and scanning them in, if I can get my scanner to co-operate...


    Regards,
    Gordon.

  14. #14
    Klaus
    Guest
    Hey bo

    its hard to get a second pair of 2235 H. To get an 2226 H is no problem.

    Do you think it make sense to combine 2235 H with 2226 H.

    When i calculate with winisd it gives me a box volume of 3,341 ft3
    Driver : JBL 2235H
    Project by : q
    Project for : you
    --
    Number of drivers : 1
    Box type : Vented
    Box size : 3,341 ft^3
    Tuning frequency : 32,63 Hz
    Vent : 1 vent(s)
    0,164 m length for each
    0,102 m round

    The data sheet JBL from 2235 H recommend a boxvolume of about 5 ft3
    http://www.jblpro.com/pub/manuals/enclgde.pdf

    please can you explain the difference.

    Thank you

    Klaus

  15. #15
    Obsolete
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    "its hard to get a second pair of 2235 H."

    Quota limit? It isn't hard to get a first pair? I posted the link to new 2235H's. It's pretty easy. If they won't ship to Germany, have a friend here get them for you and bring them over to you on holiday. Besides, you say you are using K series reconed as 2235's so get two more K series and get those reconed as well. It's best to have them all the same. The older alnico baskets are flaky so get them checked with a magnetometer and reguassed if necessary. You'll want all four to match.

    "Do you think it make sense to combine 2235 H with 2226 H."

    No I don't. You're the second person who has asked that.

    "The data sheet JBL from 2235 H recommend a boxvolume of about 5 ft3
    http://www.jblpro.com/pub/manuals/enclgde.pdf

    please can you explain the difference."


    JBL probably has a better handle on how to use their own transducers. Use winISD to see how a 2235 behaves in the 5.0 cubic foot volume tuned to 28 to 34 Hz. winISD by default tries to come up with a maximally flat design and that often isn't what you want for LF response.

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