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    Senior Hostboard Member Ronald Lee's Avatar
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    Altec 421 woofer

    Is this low-freq driver a rigidized versio of the 515 or 416. I see that it won't reach down too as low as the 515 or 416, but 421 can play very loud.

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    Senior Hostboard Member Audio_by_Goodwill's Avatar
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    Re: Altec 421 woofer

    Quote Originally Posted by Ronald Lee View Post
    Is this low-freq driver a rigidized versio of the 515 or 416. I see that it won't reach down too as low as the 515 or 416, but 421 can play very loud.

    It's a musical instrument speaker. I don't know what you mean by rigidized.
    Audio_by_Goodwill
    Michigan, USA

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    Altec 421 woofer


    Altec Best's Avatar
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    Re: Altec 421 woofer

    If you are talking about a cast aluminium 16" frame as rigidized then yes.But a 416 or 515 not sure what you mean.

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    Senior Hostboard Member Ronald Lee's Avatar
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    Re: Altec 421 woofer

    Ruggedized = higher temp glues and for the voice coil, and stiffer cone to take the more violent excursion of musical instrument speakers. I was wondering is the speaker based on a 515 or 416 magnet structure/frame. I've heard that some musical instrument speakers are based on the company's hi-fi speakers.

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    Altec 421 woofer


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    Re: Altec 421 woofer

    Quote Originally Posted by Ronald Lee View Post
    Ruggedized = higher temp glues and for the voice coil, and stiffer cone to take the more violent excursion of musical instrument speakers. I was wondering is the speaker based on a 515 or 416 magnet structure/frame. I've heard that some musical instrument speakers are based on the company's hi-fi speakers.
    All you have to do is either look up the specs or look at the speaker.

    The 421 has a large back vented ceramic magnet.

    Since the 515 and 416 are both Alnico, the answer is pretty easy. No.

    The 418 can be converted to a 416 by reconing.

    There is no MI speaker close to a 515.


    The 420 Biflex can also become a 416.
    Your neighbors called. They like your music.

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    Senior Hostboard Member Panomaniac's Avatar
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    Re: Altec 421 woofer

    Good info, thanks!

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    Senior Hostboard Member Audio_by_Goodwill's Avatar
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    Re: Altec 421 woofer

    Quote Originally Posted by Ronald Lee View Post
    Ruggedized = higher temp glues and for the voice coil, and stiffer cone to take the more violent excursion of musical instrument speakers. I was wondering is the speaker based on a 515 or 416 magnet structure/frame. I've heard that some musical instrument speakers are based on the company's hi-fi speakers.
    There is a 515-GHP....... The HP stands for high power, I believe. That would probably fit the bill for ruggedized.
    Audio_by_Goodwill
    Michigan, USA

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    Senior Hostboard Member Ronald Lee's Avatar
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    Re: Altec 421 woofer

    Audio_by_Goodwill: But it is still a hi-fi speaker and not a mI speaker.

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