Altec 811B Horn + Big Woofer DIY System

Discussion in 'DIY' started by spwath, Jan 8, 2018.

  1. spwath

    spwath Hijinks master cum laudle

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    That too. But it shouldn't be to complicated with a simple 2 way crossover.
     
  2. philipmorgan

    philipmorgan Member of the month

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    Famous last words of every DIY project ;)
     
  3. spwath

    spwath Hijinks master cum laudle

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    Ok, ordered the compression drivers. Next step, aquire some more money to buy the woofers with. Then find woofers to buy.
     
  4. dmckean44

    dmckean44 In a Sherwood S6040CP relationship

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    What are you looking for in a woofer? What are your goals for bass reproduction?
     
  5. spwath

    spwath Hijinks master cum laudle

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    I don't really know. I like my HD 650s, and Dahlquist speakers, neither of which go particularly low. I'm not sure I need it to extend super deep, but I want it to go low enough. The cabinet would probably be about 7ft^3, give or take. Seems like sealed has some advantages, at the disadvantage of extension.
     
  6. ultrabike

    ultrabike Measurbator - Admin

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    I believe that indeed there is a trade off in sensitivity and extension for similar size drivers. One needs the right set of drivers though. One also needs a "cross over" (really an analog equalizer) to make sure things sound decent IMO. Not enough experience here yet though.
     
  7. purr1n

    purr1n Desire for betterer is endless.

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    In addition to xover, horns will likely need EQ circuit to push down midrange bump from horn gain. A parallel cap, coil, and resistor in series with the driver will do.

    Not familiar with Altec 811b. Radian 475pb works with 511b. Maybe 450pb?
     
  8. spwath

    spwath Hijinks master cum laudle

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    Don't you have the 811B?
    Anyway, I got the FaitalPro drivers for that.

    Ok, ill have to do some experiementing with the eq. Any idea on specific values?
     
  9. dmckean44

    dmckean44 In a Sherwood S6040CP relationship

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    If you're into mids and vintage sound you might want to see if you like it first. They call it the Valencia shout.
     
  10. purr1n

    purr1n Desire for betterer is endless.

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    I have the 511b, the 500Hz horns. Faital drivers are fine. There isn't much difference between compression drivers from reputable manufacturers.
     
  11. purr1n

    purr1n Desire for betterer is endless.

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    Modern DIY implementations with proper EQ / xover networks can sound remarkably accurate, very much like properly set up movie theaters of today. The main problem with a two way is rolled / ragged high end.
     
  12. spwath

    spwath Hijinks master cum laudle

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  13. purr1n

    purr1n Desire for betterer is endless.

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    Oops. Typo. I can make it up to you by selling you my second 511b pair for $1. You cover shipping.
     
  14. spwath

    spwath Hijinks master cum laudle

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    Are you actually serious? I would love 511Bs. That is actually what I tried to get, guy said he had 511B, I show up and they are 811B, but I bought them anyway.
     
  15. purr1n

    purr1n Desire for betterer is endless.

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    I am serious. I didn't realize I had two pairs. Found the extra in a cabinet in my garage. I usually find all sorts of awesome speaker parts that I forget that I had.
     
  16. Cspirou

    Cspirou They call me Sparky

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    If you take Marvey's 511B I can take a pair of 811Bs off your hands. Unless you feel like hoarding 3 pairs of horns. Of course ill pay for them.
     
  17. spwath

    spwath Hijinks master cum laudle

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    Yeah, Ill have way too many horns now. Pm me.
     
  18. spwath

    spwath Hijinks master cum laudle

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  19. purr1n

    purr1n Desire for betterer is endless.

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    You will need a BIG cabinet to get bass out of it.
     
  20. dmckean44

    dmckean44 In a Sherwood S6040CP relationship

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    Bigger than the 7 Cu. Ft. he's planning?
     

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