Mid speaker alignment question

Discussion in 'Home Theater Projects' started by Phil Olson, Jun 7, 2006.

  1. Phil Olson

    Phil Olson Stunt Coordinator

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    I am building a WMTMW speaker using the CCS WR125S as the mids. The problem is that the driver requires so much volume for a flat response that it adds considerable size to the box.

    If I bring the volume for those drivers down to a reasonable level, it puts a .8 dB hump in the curve at around 165 Hz, (Q=.925). Since the pass freq will be about 900-1000 Hz or higher the hump should be more than 30 dB down if I'm correct, (12 dB/oct).

    Anything wrong with this? I could increase the box some more and cut the hump further but considering the above would it be worth it?

    Thanks,
    Phil
     
  2. chuckg

    chuckg Supporting Actor

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    Stuff it.



    The box, I mean, with a bit of fiberglass.
     
  3. Phil Olson

    Phil Olson Stunt Coordinator

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    Yea, I definitely plan of stuffing it but it won't likely be enough. In general though, would a 1 dB hump that far down be a problem? My guess is that I can also tune it out in the XO, (at least I think so!).
     
  4. Mark Hayenga

    Mark Hayenga Supporting Actor

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    If you are crossing at 900Hz-1kHz and the bump is at 165Hz you can effectively ignore it. It might change your rolloff slope a little but it should be quite a ways down. I wouldn't worry about it. But do stuff.
     
  5. Phil Olson

    Phil Olson Stunt Coordinator

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    Thanks, I'll give it a shot.
     
  6. Mark Hayenga

    Mark Hayenga Supporting Actor

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    Just be careful with how the HP filter interacts with the impedance peak at the midrange Fs if this is for your midrange. You'd have to watch this with either a lower Q setup or a higher Q setup, but be aware it's something you'll have to deal with.
     

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