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Thread: 291-16B Diaphragm choice

  1. #1
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    291-16B Diaphragm choice

    I am looking for some new Diaphragm's for a couple of my 291-16B Altec Lansing 16 Ohm drivers.

    Can someone send me in the right direction, I see the ones on Ebay but I also don't want to put junk in these drivers. Let me know the best aftermarket diaphragms out there that I should put in there.

    Also none of them have a power rating... I know they were originally 40 Watts.

    Thanks for your help ahead of time.

    Ben

  2. #2
    Moderator hjames's Avatar
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    Quote Originally Posted by jf4everstereo View Post
    I am looking for some new Diaphragm's for a couple of my 291-16B Altec Lansing 16 Ohm drivers.

    Can someone send me in the right direction, I see the ones on Ebay but I also don't want to put junk in these drivers. Let me know the best aftermarket diaphragms out there that I should put in there.

    Also none of them have a power rating... I know they were originally 40 Watts.

    Thanks for your help ahead of time.

    Ben
    Great Plains Audio -
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  3. #3
    Dang. Amateur speakerdave's Avatar
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    Quote Originally Posted by jf4everstereo View Post
    I am looking for some new Diaphragm's for a couple of my 291-16B Altec Lansing 16 Ohm drivers.

    Can someone send me in the right direction, I see the ones on Ebay but I also don't want to put junk in these drivers. Let me know the best aftermarket diaphragms out there that I should put in there.

    Also none of them have a power rating... I know they were originally 40 Watts.

    Thanks for your help ahead of time.

    Ben
    The 291 is a late Alnico magnet driver that is the equivalent of the 288 G except for the original diaphragm. The 291 was sold with a more durable but not as good sounding diaphragm for high-powered use. I'm pretty sure GPA will steer you toward 288-G diaphragms. You will then have some very good-sounding drivers.

    I wouldn't buy ebay diaphragms for the Altecs, even so-called NOS. They sometimes go for as much or more than the GPA ones, which as I understand are made on the original tooling by people who once did it for Altec.

  4. #4
    Senior Member spkrman57's Avatar
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    Possible solution

    I just replaced the diaphrams in my Altec 291-16K drivers and they are symbiotek.

    I bought new "all" aluminum diaphrams to convert them into 299's per Bill H. at Great Plains.

    My old diaphrams worked okay, I just wanted to replace them with a diaphram with better top HF response since they would be used in a 2-way system with no tweeter.

    If you think that my older symbiotek diamprams might work for you, send me a PM.

    Regards, Ron
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  5. #5
    Member analog addict's Avatar
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    The other option...

    ...is to talk to Bill H at GPA, and turn them into 288-16G's. I sent them my 291's, and they did the rest.....
    Cheers!

    Analog Addict

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