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Thread: New Project : DIY 4438

  1. #16
    Senior Member Guido's Avatar
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    Quote Originally Posted by johnaec
    I've also heard it rumored that the 2123H curve is not as flat as published
    John
    The 2123H curve on the spec sheet is JBLs wish
    The reality differ within +-3dB
    No Idea why the heck they didn't measure it for the spec

  2. #17
    Senior Member Ralf's Avatar
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    Talking Setup complete...

    Just in the moment I presented the telephone. I had a straight longer discussion with Guido over the composition of the drivers for our new project.

    But now we have the finally compilation. .... Drum roll ....

    I am to be allowed to present proudly our new concept: The ultimate double 18" monitors:


    By suggestions from your row we will take the following drivers:

    right and left satellite speakers:

    1 x 2405
    1 x Horn PT-H1010HF (if we will get it...alternative: PH316) driven by a 2430 neodymium
    1 x 2012
    Passive network, cutoff 2012/2430 1.200Hz, 2430/2405 10.000Hz

    Subs:
    4 x 2242H (separately cabinets) optimized to 30Hz
    active network 5235A A, cutoff 2 x 80Hz
    active network 5235A B, cutoff 2242/2012 2 x 200-300Hz (we`ll see)

    This speakers will give us a mix of best sound, lowest possible power compression and with smallest possible cabinets.
    And the best is: the systems are transportable
    On next sea party in spring we will test two systems of it (Guido`s and Ralf`s). Can anybody imagine what 8 2242s can do???
    16 Hz can not be substituted

  3. #18
    lfh
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    Thumbs up

    You guys are obviously completely out of your minds!


  4. #19
    Senior Member Ralf's Avatar
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    first results

    Hi Guido,

    here are my first results about the cabinets:

    1 x 2242H :
    260l / 9.18 cf vented
    3 ducts 100mm / 4" tuned to 30Hz

    1 x 2012H :
    1,4l / 0,05 cf closed

    What we see is, that the second 2242 should get a cutoff about 80Hz....
    Attached Images Attached Images  
    16 Hz can not be substituted

  5. #20
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    mid horns-

    Hello,

    Yesterday I ordered two JBL horns that were not previously available (to me anyway): 126-00013-00 which is 100x100 OASR for 1 inch driver and 338786-001 (pt-f1010hf ) which is 100x100 for 1.5 inch drivers. The oasr horn was recently shown in a post here on the forum and the pt horn was discovered by guido some time ago but wasn't available then. I will let you know when (if) they arrive, which is promised in about one week.

    Regarding your low-mid/upper-bass driver you could also consider e145 in a sealed box. It has a good reputation here and it would allow you a lower crossover to your 2242s.

    Regards,
    Tom

  6. #21
    TimG
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    I think you are going to run into integration problems between you 2012H and your 2242H. The 18s will work best if you cross them over around 70-100Hz so you will be free to place them for best bass response. The 2012H will be best used above 300Hz, so that leaves with with a gap between the subwoofers and the midranges. Since you are 75% of the way to building Drew Daniels horn system, why not just build the whole thing? (2) 2242Hs 25-75Hz, (2) 2226H 75-300Hz (since 2227H are discontinued), (1) 2012H 300-1200Hz, (1) 2430H 1200-10kHz, and (1) 2405H 10-20kHz. http://www.audioheritage.org/html/pe...s/1-intro.html

  7. #22
    Senior Member Ralf's Avatar
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    Pt-h1010hf

    Quote Originally Posted by tomp787
    Hello,

    Yesterday I ordered two JBL horns that were not previously available (to me anyway): 126-00013-00 which is 100x100 OASR for 1 inch driver and 338786-001 (pt-f1010hf ) which is 100x100 for 1.5 inch drivers. The oasr horn was recently shown in a post here on the forum and the pt horn was discovered by guido some time ago but wasn't available then. I will let you know when (if) they arrive, which is promised in about one week.

    Regarding your low-mid/upper-bass driver you could also consider e145 in a sealed box. It has a good reputation here and it would allow you a lower crossover to your 2242s.

    Regards,
    Tom
    Hi Tom,

    that are maybe good news. It isn`t possible to order such horns in germany because it isn`t in the JBL parts list (neither Europe nor USA) and we got some informations that the only one of PT-H1010HF which is available in the whole company lies in a safe and will be guarded from human corrosive dogs....

    What is the difference between the PT-F1010HF and the PT-H1010HF?

    I have heard about a price of 79$ for the PT-H1010HF. Is it right?

    the e145idea: my first choice was a 2234H (same idea: lower crossoverpoint...), but everyone advised against to me. We make some testboxes and then measurement decides....

    Thank you

    Ralf
    16 Hz can not be substituted

  8. #23
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    horn links

    Hello,

    Here are the links to the horns:

    1) horn parts list
    http://www.jblproservice.com/pdf/Hor...%20List%20.pdf

    2) PT waveguide document.
    http://www.jblpro.com/ae/pdf/PT_WaveGuide.pdf
    The "F" version is rectangular and supposed to be lower distortion according to the pdf above ($83). I will try it with 2430. The "H" version is said to have better pattern control.

    3) OASR horn
    http://www.jblpro.com/srx/srx_product.htm
    the sr4702x and sr4722x use the oasr horn ($57). It appears to replace 2342/2344 at a good price. I will try it with 2410 and altec 802

    I don't know the exact prices as I have only left a deposit. I expect a discount from the retail price.

    Best Regards,
    Tom

  9. #24
    Senior Member Ralf's Avatar
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    Poaaaaahhhhh

    Quote Originally Posted by TimG
    I think you are going to run into integration problems between you 2012H and your 2242H. The 18s will work best if you cross them over around 70-100Hz so you will be free to place them for best bass response. The 2012H will be best used above 300Hz, so that leaves with with a gap between the subwoofers and the midranges. Since you are 75% of the way to building Drew Daniels horn system, why not just build the whole thing? (2) 2242Hs 25-75Hz, (2) 2226H 75-300Hz (since 2227H are discontinued), (1) 2012H 300-1200Hz, (1) 2430H 1200-10kHz, and (1) 2405H 10-20kHz. http://www.audioheritage.org/html/pe...s/1-intro.html
    What a project....
    16 Hz can not be substituted

  10. #25
    Senior Member Ralf's Avatar
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    Quote Originally Posted by tomp787
    Hello,

    Here are the links to the horns:

    1) horn parts list
    http://www.jblproservice.com/pdf/Hor...%20List%20.pdf

    2) PT waveguide document.
    http://www.jblpro.com/ae/pdf/PT_WaveGuide.pdf
    The "F" version is rectangular and supposed to be lower distortion according to the pdf above ($83). I will try it with 2430. The "H" version is said to have better pattern control.

    3) OASR horn
    http://www.jblpro.com/srx/srx_product.htm
    the sr4702x and sr4722x use the oasr horn ($57). It appears to replace 2342/2344 at a good price. I will try it with 2410 and altec 802

    I don't know the exact prices as I have only left a deposit. I expect a discount from the retail price.

    Best Regards,
    Tom
    Hi Tom,

    if you really will get the horns let us know....and also the results with pt/2430
    Compared with the old horns the new ones are affordably....

    Thank you
    Ralf
    16 Hz can not be substituted

  11. #26
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    new horns

    Hello,

    The rectangular PT horn (100 x 100) has arrived. It is 304 (w) x 164 (h) mouth x 74 (d) with a 38mm throat. Unfortunately I am quite busy and may not test it until after the first of the year. The retail price is about $87 USD.

    The 100 x 100 OASR horn also arrived, It has a 25mm throat with a screw on mount The retail price was $57 USD. I don't have any screw on drivers so I will have to find an adapter.

    I think the OASR horn is the more interesting of the two visually. The low price of $57 should make all the 4430 diy people very happy.

    Regards,
    Tom

  12. #27
    Senior Member Guido's Avatar
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    Good News Tom!

    But I was mainly interested in the 100x100 Horn that is 304x304mm. Can't remember the exact name at present.
    Do you know if this is also available?
    I don't think the OASR Horn is suitable for use down 1kHz.
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  13. #28
    Senior Member Ralf's Avatar
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    Quote Originally Posted by Guido
    Good News Tom!

    But I was mainly interested in the 100x100 Horn that is 304x304mm. Can't remember the exact name at present.
    Do you know if this is also available?
    I don't think the OASR Horn is suitable for use down 1kHz.
    Hi Guido,

    look on my previous answers. This is the PT-H1010HF...
    16 Hz can not be substituted

  14. #29
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    Quote Originally Posted by TimG
    I think you are going to run into integration problems between you 2012H and your 2242H. The 18s will work best if you cross them over around 70-100Hz so you will be free to place them for best bass response. The 2012H will be best used above 300Hz, so that leaves with with a gap between the subwoofers and the midranges. Since you are 75% of the way to building Drew Daniels horn system, why not just build the whole thing? (2) 2242Hs 25-75Hz, (2) 2226H 75-300Hz (since 2227H are discontinued), (1) 2012H 300-1200Hz, (1) 2430H 1200-10kHz, and (1) 2405H 10-20kHz. http://www.audioheritage.org/html/pe...s/1-intro.html
    You are right, unless they want a PA system it would be better to use a single 2245 up to 300hz which (1) is entirely adequate for home use.

    Alternatively a JBL sub 1500,then a mid bass 12 or 15. This would control box size

    Ian

  15. #30
    RE: Member when? subwoof's Avatar
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    Agreed on the 2012H - simply the best sounding high power 10 I have ever used. 15's just do *not* do well at 1000hz due to beaming.

    And use the large format drivers - the one inch stuff just has too much distortion no matter what you do.

    If you want to remove plaster, and sterilize the cat, you might as well enjoy it for more than one song.

    In progress:
    (2) 1400Nd
    (1) 2012H
    (1) 2435Be
    (1) 2332
    (1) 2405
    In solid ash cabinets inspired by the 250Ti

    In a matching rack:
    Modified urei 525
    Modified urei 539A (2)
    Modified urei 6505 (6)
    ( modules from 6500 amplifier w/ lead compensation )
    stay tuned for pictures in march / april....

    sub

    btw - the sub is a 4688 w/ 2242's in da closet with a modified MA10,000...

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