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Ideal amp for single HE15...

Discussion in 'Archived Threads 2001-2004' started by Vince Bray, Sep 6, 2001.

  1. Vince Bray

    Vince Bray Stunt Coordinator

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    Well, a K2 would be even better, but...
    The Crest CA9:
    -800w x 2 into 4ohms from 20hz-20khz
    this also is about the linear max power, so a good match
    -damping 700:1 into 8ohms from 10hz-400hz
    -cooled by two variable speed fans @45cfm each
    fans idle at low speed when not needed
    -price $400 - $500 on ebay
    according to sim, this would drive an HE15 to 115db
    from 20hz on up. Anyone have any experience with this
    particular amp?
    Vince
     
  2. Brandon B

    Brandon B Second Unit

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    The one point the K1 or K2 absolutely standout on is damping, over 3000 10-400 Hz, which is better than even the Crown Macrotech I have for my coming dual HE15. If you look at the graph in the K series manual, the damping is almost 10,000 in the bottom 2 octaves.
    What I don't know, and hopefully a more knowledgeable person will post, is once you get to a "good" level of damping (300? 500?), is there a steep diminishing returns factor?
    Cheapest I've seen a new K1 though is $999. So the Crest sounds hard to beat for the price.
    BB
     
  3. Brandon B

    Brandon B Second Unit

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    Did some checking to answer my damping question. Seems like the advantage largely goes away if you put wire in between your amp and sub. Since it seems hard to avoid that, you're looking at almost no difference. Here's a page with an interesting online calculator for damping factor. 8-10 feet of wire lowers almost all good damping factors into the low 100's.
    http://www.eatel.net/~amptech/elecdisc/dampfact.htm
    BB
     

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