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Thread: Newbie needs help with Altec Horn 811B

  1. #1
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    Newbie needs help with Altec Horn 811B

    Hello all - be gentle - new to the Altec and the forum.

    I have got my hands on a pair of Altec 811b horns cheap. I will be using them in my PA system that is set up in my out house.

    other speakers:

    2 18inch scoop bins - 30-80hz
    2 15inch horn loaded kick bins 80-200hz
    2 12inch flared horns 200-500hz
    2 8 inch mid 500-6.5khs
    2 Altec horns with compressions to be purchased - need to cover 6.5hz and above.

    I wanted to know if there was a compression driver that is highly regarded for the horn that would allow use from 6.5khz and above.

    A modern off the shelf driver that I could blow without worrying about replacing the diaphram because it is rare or antique.

    Any input would help!

    Thanks

    Bhavin
    UK
    Last edited by I_B; 12-21-2011 at 03:12 AM. Reason: correcting system crossover poiints

  2. #2
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    I have purchased from Bill at Great Plains

    Their work is superb.http://www.greatplainsaudio.com/
    Last edited by Hey19; 12-21-2011 at 05:05 AM. Reason: sp

  3. #3
    Senior Member louped garouv's Avatar
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    Quote Originally Posted by I_B View Post
    Hello all - be gentle - new to the Altec and the forum.

    I have got my hands on a pair of Altec 811b horns cheap. I will be using them in my PA system that is set up in my out house.

    ....

    2 Altec horns with compressions to be purchased - need to cover 6.5hz and above.

    I wanted to know if there was a compression driver that is highly regarded for the horn that would allow use from 6.5khz and above.

    A modern off the shelf driver that I could blow without worrying about replacing the diaphram because it is rare or antique.

    Any input would help!

    Thanks

    Bhavin
    UK
    although the Altec (3000 series? i think) tweeters are excellent units, the drivers for the
    altec 811 horn are not really considered tweeters... generally they are used somewhere
    between 500Hz/1200Hz and up (where your 8" mids are now serving) in a two way alignment

  4. #4
    Senior Member grumpy's Avatar
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    Outhouse having a different UK meaning, slang or otherwise?

  5. #5
    Heather [Senorita member] hjames's Avatar
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    Quote Originally Posted by grumpy View Post
    Outhouse having a different UK meaning, slang or otherwise?
    18 inch scoop bin & woofers to achieve the mythical brown note, eh?
    2ch: Oppo, JoLida 502CRC, JBL L212, 18ti,240ti; Heath AS101, Von Schweikert VR4
    7.1: Oppo BDP103D, B&K, UREI 809A, JBL B460

  6. #6
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    @grumpy - outhouse means the same here, its just big!

  7. #7
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    Quote Originally Posted by louped garouv View Post
    although the Altec (3000 series? i think) tweeters are excellent units, the drivers for the
    altec 811 horn are not really considered tweeters... generally they are used somewhere
    between 500Hz/1200Hz and up (where your 8" mids are now serving) in a two way alignment

    What would happy if I put a modern driver on the horns that went from say 4khz to HF?

    I dont have the cash to give it a go so wondering if anyone has tried anything similar?

  8. #8
    Senior Member grumpy's Avatar
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    Selenium D220ti and an adapter (threaded to bolt-on pattern)
    Or maybe B&C DE400TN or DE250... lots of inexpensive options
    With available replacement elements...

  9. #9
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    Quote Originally Posted by I_B View Post
    Hello all - be gentle - new to the Altec and the forum.

    I have got my hands on a pair of Altec 811b horns cheap. I will be using them in my PA system that is set up in my out house.

    other speakers:

    2 18inch scoop bins - 30-80hz
    2 15inch horn loaded kick bins 80-200hz
    2 12inch flared horns 200-500hz
    2 8 inch mid 500-6.5khs
    2 Altec horns with compressions to be purchased - need to cover 6.5hz and above.

    I wanted to know if there was a compression driver that is highly regarded for the horn that would allow use from 6.5khz and above.

    A modern off the shelf driver that I could blow without worrying about replacing the diaphram because it is rare or antique.

    Any input would help!

    Thanks

    Bhavin
    UK
    Get rid of all your filters and just run a 10uf cap at the horn

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