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Thread: Concrete Egg halfs

  1. #1
    Member lasse's Avatar
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    Concrete Egg halfs

    Hallo !!
    My wife gave me a pair of eggs , she got them for free !!!!
    They are built in concrete ca 100 cm high and ca 50 cm at the base...ca 80 liters.
    Cerwin Vega drivers that do`nt work.
    I will send pictures !!
    The design of the cab in concrete and its stands is cool and the wife really would accept them in the house ( my other stuff is stufft in the garage)
    So......i have a pair of 2213 that i would like to use, two2105 that would be perfect.....and .... a pair of 2405.
    To match the 2213 and the 2105 is easy , there are a lot of info in the search....
    But how match the 2405 with the 2105........

    Please help me satisfy my Wife !!

  2. #2
    Senior Member grumpy's Avatar
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    pics would be interesting.

    JBL Jubals (L65) did the cone-mid, 077/2405 thing, as an example.

    You're on your own regarding your wife

  3. #3
    Member lasse's Avatar
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    Hi Grumpy
    Have some trouble With the pics ,,, Sorry !!
    Try to fix it !!
    So if i take the Lf xo from the 3412 and the Hf xo from the L65 with the 2105 at the middle
    i have a nice start...??
    I`m really lousy at englich......Speak it rather well ....but spelling an so on is hard....

    Lasse

  4. #4
    Senior Member grumpy's Avatar
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    at the very least, you will want to reduce the 077/2405 output to be closer to what the
    mid and woofer do with the same level input (match sensitivities)... The L65 happens to
    use an autoformer and an L-pad to do this, so perhaps it wasn't the best example (as the
    autoformers aren't readily available). My point was that JBL has used that mid series
    and tweeter together in a number of systems (4315 monitor also used an autoformer for
    this pairing). You can get an idea of the crossover frequencies and slopes JBL used in
    reviewing those systems.

  5. #5
    Member lasse's Avatar
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    The Eggs

    Here they are!!
    Attached Images Attached Images   

  6. #6
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    Nice eggs.

    mats
    4345 diy, K2/Array diy Ht. TAD 4 way diy.

  7. #7
    Senior Member macaroonie's Avatar
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    Hope you have these all ready in time for easter

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    Am I correct in thinking that 4313B did an equivalent network for the L300 where the auto transformer is canned . I'll have a rummage for it

  8. #8
    Senior Member Woody Banks's Avatar
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    x-overs

    Hello Lasse

    If you want to give the L65 crossovers a shot at your eggs, I have a pair that are collecting dust that you can have for the cost of postage. I suspect that the L pads either need cleaning or replacing.

    Woody
    Attached Images Attached Images  

  9. #9
    Member lasse's Avatar
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    Easter egg !!

    Macaroony.......Its haloween time !!
    The eggs is at the moment paited orange and lid up with candels in our garden

  10. #10
    Senior Member macaroonie's Avatar
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    4313B's equivalent L300 / 4333 circuit.
    You only need the HF section

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    But of course Woody has come up with the goodies I would take him up on his kind offer and send him a couple of blondes for Christmas

    This is a fun project Lasse , I hope it will all work out well.

    Mac

  11. #11
    JBL 4645
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    To please the wife, now, hmm place some fluffy chicks around them.


    Or how about make her an omelette.

    Now all you need is an egg seat and you're sorted.

    It’s a bit early for Easter. But those look like some cool groovy egg speakers retro eggs.

    How would you like bass love, sunny side up or sunny side down?

    All you need now are some egg subs. And for room acoustics, egg boxes.

    I thought I’d seen egg speakers before, KEF makes smaller egg loudspeakers.
    http://www.kef.com/gb/surround

    JBL Creature has tiny like egg sized loudspeakers. So you can please her with some tiny eggs in the bedroom.
    http://www.jbl.com/EN-US/Products/Pa...D=CREATURE3BLK

    You mentioned concrete so how heavy do these weigh?

    So who would you go about making one of these?

    Wooden base filled with concrete with second wooden shape pressed into the concrete so that part of concrete slops over. Wait till it sets hard and break away the wooden frame.

    Drill holes in the sides for bolt screws and then make wooden rim for the front baffle attach it to the rim and you’re almost there? Is that how it’s done?

    Edit: Found this.
    Austrians build concrete cast 5.1 speaker set
    http://www.engadget.com/2007/01/23/g...1-speaker-set/

  12. #12
    Member lasse's Avatar
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    Thank you all for all the fun
    Yes i`ve been in contact with Woody.......a very nice guy !!
    Macaroony......thanks for the XO plans !!

    I will start picking the eggs apart so its possible that we see how its built.
    The weight is ca 45 kilo without stands.......
    I will send pics !!

    Lasse

  13. #13
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    I'd re-do the baffle. Large roundovers on the edges would help both acoustically and aesthetically.

    I'd also make a point of bringing the driver spacing closer together.

    Cool project let us know how it progresses!

  14. #14
    Member lasse's Avatar
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    Egg

    Hallo !!
    The guy ho made these eggs only used a 5 mm plywood baffle !!
    I`m building a new one in 25 mm MDF.
    The drivers will be 2213 , 2105 and 2405.
    The xo is still the biggest truble !!
    Have started to pick the eggs apart , will send som pics !!

    Lasse

  15. #15
    Senior Member Akira's Avatar
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    Quote Originally Posted by lasse View Post
    To match the 2213 and the 2105 is easy , there are a lot of info in the search....
    But how match the 2405 with the 2105........
    The 2405 and the 2105 are an excellent match. Look no farther than the 4315 studio monitor. Just cross them over high, 7.5K or better. The 2105 extends to 11K, even if not ideal in that range and the 2405 looses it's "airy" quality and starts to sound harsh under 10K--especially if driven hard in applications such as sound reinforcement. The 4315 crosses over at 8K, a good compromise.

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