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Center Channel Design

I need to build another center channel as friends and family keep taking mine. So as long as we are asking opinions about designs, which one do you like?  I like to build matching mains as long as I'm cutting wood.  The front baffle is 5" x 19"




 John H, thanks to JP I did get that email

Comments

  • I like the B, asymmetrically symmetrical!
  • Hey John, can you post the measuring criteria and XO considerations for the Center vs the Mains. would be good to know how the same speaker would behave in two orientation. My MTM is not symmetric on the top and bottom... :s
  • A or B, because the port would then be symmetric, left to right.  Do you think this would be audible?  Not sure it would be.
  • B....with a hint of A.
  • With respect to symmetry, the thought with the single port was to place it the same distance from the driver as the edge of the box.  I would expect some minor differences in the off axis. 
     John H, thanks to JP I did get that email
  • My measurement process for the center channel will be to measure the assembled speaker in my TV stand at a distance of 30 inches, and gate out any reflections.  I will compare this to the stand measured and see if I can create a simple x-o with only inductor and padding changes between the two designs.

    For the center channel design I'm targeting a second order LR with a low (1,500 Hz) x-o point.  With my test x-os I will measure off axis to see what changes and then change my x-o point and slopes.

    I will treat the MTM as a measure as 1 woofer and use actual measurements to look for problems off axis.  I'm contemplating using the 3.5 inch Tectonic drivers so I don't see any value separating woofers and using PCD to look off axis.

    That said, in the past I have dummied in driver parameters in PCD and tested my x-os off axis with PCD.  I think you can get a good feel if your x-o is going to put a dip in the response.
     John H, thanks to JP I did get that email
  • A!

    = Howard Stark: "This is the key to the future. I'm limited by the technology of my time, but one day you'll figure this out."
  • How about version "E", with the two thin slot port exists located on the rear of the cabinet?

  • Rear of the speaker ports are a no go for mounting the speaker in TV cabinets

     John H, thanks to JP I did get that email
  • A for center, D for LR.

  • @Silver1omo said:
    A for center, D for LR.

    Same

  • what Silver1omo and DanP said...

  • A or B, option E would put two small ports under the tweeter and between the tweeter and woofers.

  • I'm with those guys^^^. A center, D for LR.

  • I think the challenge is picking one to do both. The stand for placing on a stand is also a design element.

    I'm contemplating using my least favorite Dayton woofer series the DSA115-8. This is kind of the last chance for this series, I can only be disappointed so many times...

    Nicholas_23
     John H, thanks to JP I did get that email
  • That's a lot of woofers to use for a woofer that's not a top pick.

  • Yes, but I have two, they model very well, and I haven't spent time listening to them. It took me several weeks to develop a dislike for the DSA175 and DSA135, so I'm hopeful these can go the distance...

     John H, thanks to JP I did get that email
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