Mark K's RS225/RS28a Questions...

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  • BURRometer
    Junior Member
    • Mar 2006
    • 22
    #1

    Mark K's RS225/RS28a Questions...

    Given my limited experience with speaker design leaving me practically ignorant on the subject, I'm after some help.

    With Marks Crossover Design how close could I place the drivers together? I'm hoping for something similar to the Modula MT placement on a baffle which is angled back 7deg.

    Also would anyone have any suggestions with component selection or how to reduce the BSC or...... would I be better off spending the extra money and use the M8ta crossover?

    Thanks again,
    -Frank
    Tags: None
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    • joecarrow
      Senior Member
      • Apr 2005
      • 753
      #2
      I don't think there's any problem from placing the tweeter and woofer too close together.

      However, I think that using a sloped baffle with a crossover that wasn't designed with that in mind would be "non-optimal". Many of the designs on this board (and I think Mark's is one of them) are designed with driver mounting depth and distance of acoustic centers accounted for. Angling the baffle would change that, and the design wouldn't be the same.

      Maybe Mark's around, and could comment on how sensitive it is in this case?
      -Joe Carrow
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        • AJINFLA
          Senior Member
          • Mar 2005
          • 681
          #3
          Mark's xo is designed specifically for the baffle - and the drivers placement on that baffle - from his design. Change it to your own detriment.
          Not sure what sloping 7 deg will accomplish. The drivers are non-coincident and cannot be time aligned. Your head is too big to exist in a single point in space . Don't worry, my head is the same size. Never likes to be held in a vice either :B .

          cheers,

          AJ
          Manufacturer
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            • BURRometer
              Junior Member
              • Mar 2006
              • 22
              #4
              The box I built is 10" wide (which is too narrow for the M8ta crossover) and 40 high. The 7 deg tilt was an aesthetic choice and time alignment was not something I was trying to achieve. With tight driver spacing I was hoping to minimize any T/A error the angled baffle would create. In the Modula MT thread Jon mentioned that its crossover would work fine on an angled baffle (yes, totally different design from Marks) so I took a chance.

              ahh if only I chose to stick with a proven design. At least now I have an excuse should I develop an eye twitch :W
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