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Thread: Confinement blues....

  1. #1
    Senior Member Eaulive's Avatar
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    Confinement blues....

    What to do when you have, collecting dust on shelves...

    2x 2044h
    2x 2202h
    2x 2426j
    2x 2404

    And too much time on your hands




    THIS!!!!






    Christmas gift to myself, the rest of the details about the construction are coming.
    My avatar: 4520 loaded with 2225H on E140 frames,
    1x 2202H on custom front loaded horn, 2x 2426 on 2370.

  2. #2
    Senior Member macaroonie's Avatar
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    Why not. Darned good effort ! Sounding nice ?

  3. #3
    Administrator Robh3606's Avatar
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    Nice I did my confinement speakers as well! Might as well get something good done that you can look back and have a good accomplishment to show for it. They look great how do they sound??

    Rob
    "I could be arguing in my spare time"

  4. #4
    Senior Member Eaulive's Avatar
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    Actually it sounds like crap

    Ok, quick recap...
    I based this on the 4345 and the 4350.

    The box for LF has the same volume (254l) than the 4345, it's deeper to compensate for the added space taken for the ML cabinet that hosts the 2202. This inner cabinet has the same volume than inner cab in the 4350.

    I had 2044 and 2241 to choose from, I don't have any 2245s, I whish I had, but I don't. I choose the 2044h after modeling it in WinISD with the TS parameters from the list available here on the forum.
    According to the simulation, I was able to get almost the same curve that the 2245 in that enclosure with a narrow 3dB boost at 35Hz and a slighly longer port in that specific 254l box. Group delay was acceptable.

    Now I did not make the test with the EQ, only the bass driver straight into the amplifier. The bass lack punch and when I sweep it, it starts rolling off at 48Hz and kicks back up below 25Hz... obviously the ports are too long, and group delay must be through the roof.

    I also did the crossovers without too much thought since my goal is a quadriamplified system, I merely copied the ML/MH/H part of the original 4345 so at least I could use it bi-amplified.
    The gain of the 2370 horn and its roll-off inherent to any CD horn makes the system sound really agressive with a hole around 10kHz, but like I said, I don't mind too much since I will not use it this way.
    There is a speakon4 and a speakon8 connector in the back for either eventuality.

    Cabinets are 1" MDF throughout with bracing, glued butt joint (not mitered) I'm no cabinet maker, I made cabinets in the past, but this was my first time at veneering. I finished with black walnut veneer.

    For those who wonder, the 2404s I had were broken around the mounting holes because the previous owner did not make a hole big enough for them and they broke when screwing them in (common mistake).
    I had this idea of sandwiching them between a piece of walnut wood.

    Here are some more pictures...




    My avatar: 4520 loaded with 2225H on E140 frames,
    1x 2202H on custom front loaded horn, 2x 2426 on 2370.

  5. #5
    Senior Member Eaulive's Avatar
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    More pictures...




    My avatar: 4520 loaded with 2225H on E140 frames,
    1x 2202H on custom front loaded horn, 2x 2426 on 2370.

  6. #6
    Senior Member Eaulive's Avatar
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    And a few more...




    My avatar: 4520 loaded with 2225H on E140 frames,
    1x 2202H on custom front loaded horn, 2x 2426 on 2370.

  7. #7
    Senior Member DavidF's Avatar
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    Very nice craftsmanship. Did yourself proud!
    David F
    San Jose

  8. #8
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    Beautiful work on the cabinets!

    I've only built one pair of crossovers from scratch so I am definitely not an expert, but from my research, inductors in close proximity should be oriented perpendicular to each other.

  9. #9
    Administrator Mr. Widget's Avatar
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    Well done!
    Lots of nice details.

    They don't seem like they will quite fit under the tree, but heck... you can't have everything.


    Widget

  10. #10
    Senior Member Eaulive's Avatar
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    Quote Originally Posted by bedrock602 View Post
    Beautiful work on the cabinets!

    I've only built one pair of crossovers from scratch so I am definitely not an expert, but from my research, inductors in close proximity should be oriented perpendicular to each other.
    It might make sense, but up to what point? Theorically yes, any inductor emits a magnetic field that can be picked up by another inductor close by, but is it really audible? I couldn't say.

    Anyway like I said, I'm not planning on using the crossovers at all at some point, but I wanted to have them to experiment, because, this is what this project is at the end... a big experiment

    If I really wanted to go the crossover way, I would have put a lot more work into them. The 2370 alone screws everything up.
    My avatar: 4520 loaded with 2225H on E140 frames,
    1x 2202H on custom front loaded horn, 2x 2426 on 2370.

  11. #11
    Senior Member 1audiohack's Avatar
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    Love it! Good work!!

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  12. #12
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    Quote Originally Posted by Eaulive View Post
    It might make sense, but up to what point? Theorically yes, any inductor emits a magnetic field that can be picked up by another inductor close by, but is it really audible? I couldn't say.

    Anyway like I said, I'm not planning on using the crossovers at all at some point, but I wanted to have them to experiment, because, this is what this project is at the end... a big experiment

    If I really wanted to go the crossover way, I would have put a lot more work into them. The 2370 alone screws everything up.
    Like I said, I'm not an expert. Good luck with the project

  13. #13
    Senior Member grumpy's Avatar
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    The blue and walnut looks great

    Hope the electronic 4-way comes together!


  14. #14
    Senior Member srm51555's Avatar
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    They look awesome, keep us posted on any updates

  15. #15
    Senior Member tjm001's Avatar
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    Excellent work!

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