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Thread: 4367 Cabinet

  1. #46
    Member sebackman's Avatar
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    More pictures
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    The solution to the problem changes the problem.
    -And always remember that all of your equipment was made by the lowest bidder

  2. #47
    Member sebackman's Avatar
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    Even more...
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    The solution to the problem changes the problem.
    -And always remember that all of your equipment was made by the lowest bidder

  3. #48
    Member sebackman's Avatar
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    The solution to the problem changes the problem.
    -And always remember that all of your equipment was made by the lowest bidder

  4. #49
    Member sebackman's Avatar
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    Getting there. The last picture is the bracing and driver support that has been mounted. Quite time consuming. But now the cabinets are quit silent when I do the traditional "finger-nock exercise". :-)
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    The solution to the problem changes the problem.
    -And always remember that all of your equipment was made by the lowest bidder

  5. #50
    Administrator Wardsweb's Avatar
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    Love the level of this build. Kudos to you sir. Well played.

  6. #51
    Senior Member srm51555's Avatar
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    Stellar work as usual Rob. Nice touch on the focals

  7. #52
    Member sebackman's Avatar
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    Ok time for some updates on my 4367M clones.

    Drivers sorted and IMHO well matched (see separate thread) and cabinets done since a few months.

    All open surfaces inside reinforced with diagonal braces forming triangles that do not have natural resonances. Walls lined with bitumen plates, wool felt and fiberglass. I use ladies hairspray on the fiberglass to avoid lost fibers exiting the the bass ports. Ports are deeper to get to an f0 around 26-27Hz.

    They did get heavy... :-( but rather "dead" when doing the old finger-knock on the walls

    Drivers mounted on the horns with the adapter plate and stickers in place. Looks decent.

    I will mount the horns next week. Then the fun stuff begins in designing the DSP filters . I will start with IRR filters as I feel comfortable with that process. Later I will kindly ask the FIR giants like POS to help me to turn them into phase linear FIR filters. Exciting.

    Have a nice weekend
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    The solution to the problem changes the problem.
    -And always remember that all of your equipment was made by the lowest bidder

  8. #53
    Senior Member maxwedge's Avatar
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    Thumbs up

    Those loooook awesome! Very impressed with your work!

  9. #54
    Senior Member Odd's Avatar
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    Very nice work and finish.
    43XX (2235-2123-2450-2405-CC 3155)5235-4412-4406-4401-L250-18Ti-L40-S109 Aquarius lV-C38 (030) 305P MkII

  10. #55
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by maxwedge View Post
    Those loooook awesome! Very impressed with your work!
    Quote Originally Posted by Odd View Post
    Very nice work and finish.
    What they said!

    Widget

  11. #56
    Senior Member Jakob's Avatar
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    Vackert!Thank you for sharing your work!Im really looking forward to see how your dsp filters turn out. With your informative posts I bet I will learn quite a lot!

  12. #57
    Member sebackman's Avatar
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    First one done after a good year. Mounting those wave guides is not fun. Not much room to bolt from the rear with all the bracing. My own fault of course.

    Will do the second tomorrow, I hope. Then the DSP fun begins.

    Drivers are matched NOS 2451SL cores with NOS 475Nd diaphragms. My favorite combo. Woofers are of course 2216Nd-1 as they should.

    F0 is about 26-27 Hz, right where I wanted it. Sheer luck I guess. Ports are prolonged about 3". You never know until its all in the cabinet.

    To make parody on the old Carlsberg beer add; Probably The Best 4367M In The World...

    Have good weekend

    //Rob
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    The solution to the problem changes the problem.
    -And always remember that all of your equipment was made by the lowest bidder

  13. #58
    Member sebackman's Avatar
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    First impression with a cheap-and-dirty DSP curve is very promising.

    I think one of the main advantages of the large format driver and the 4367 wave guide is that horn load extends down to the 500Hz region. The drivers has rising impedance from about 650Hz and XO at 700Hz is probably about right.

    I dialed in some LR24 with a few EQ points, guesstimate delays and adjusted phase and that was not half-bad. I run mono in the workshop for initial tests.

    Beyond that I really like the matched 2451 cores with the 475Nd diaphragms. That combo seem to love the newer JBL wave guides.

    The 2216 just loves power and my smaller shop amps is no match for my down-ported 2216Nd-1's. The current it can provide is just not enough. I had the same experience with the woofer in the LSR 6332 (252G 4 ohms), they just needed a big amp to come to life even on low volumes.

    Will bring down my normal ref Genelecs and LSR6332's tomorrow just to get a better feel for potential differences. The next few weeks will be getting a good DSP file in order. Exciting times.

    Have nice weekend
    //Rob
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    The solution to the problem changes the problem.
    -And always remember that all of your equipment was made by the lowest bidder

  14. #59
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by sebackman View Post
    Exciting times.
    //Rob
    Indeed!


    Widget

  15. #60
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    Lovely Work!


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