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The Rally Sports - Dayton Pro Driver 15" 3-way

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  • #31
    Beautiful craftmanship as usual Javad. Kudos!
    Don't worry, if your parachute fails, you have the rest of your life to fix it.

    If we all did the things we are capable of doing, we would literally ASTOUND ourselves - Thomas A. Edison

    Some people collect stamps, Imelda Marcos collected shoes. I collect speakers.:D

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    • #32
      Javad -- Rookie question here, but how do you use the DATs software to measure the actual port frequency of the constructed box? I didn't realize one could do this until you had a little excerpt about it with one (1) of your pictures.

      Beautiful build by the way. TBO I always treated poplar as "drift wood" ever since I was a kid. It was the wood that we used to fill in corners of cabinets, brace for counter-tops, etc. You have completely changed my outlook on this. Gorgeous boards you have selected for this build and nice craftsmanship.

      Also love that you used pro-audio drivers! I don't have any technical reasoning or wording to explain why I like them better, but I generally lean towards those of Eminence, Faital, and B&C over the home Hifi stuff. I love a good compression driver in the right wave guide too. Cheers!
      Chris
      "I don't know everything and do not claim to. I continue to learn and that is what makes me human."

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      • #33
        Originally posted by thekorvers View Post
        Beautiful craftmanship as usual Javad. Kudos!
        Thanks!
        --
        Javad Shadzi
        Bay Area, CA

        2-Channel Stereo system in the works with Adcom components and 4-way towers

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        • #34
          Originally posted by STIchris722 View Post
          Javad -- Rookie question here, but how do you use the DATs software to measure the actual port frequency of the constructed box? I didn't realize one could do this until you had a little excerpt about it with one (1) of your pictures.
          All you need to do is a full impedance sweep of the driver mounted in the enclosure, the fs of the enclosure is where impedence rises, dips, then rises again, the lowest point in the dip is the Fs. IMO this is critical to designing and building any ported enclosure, and IME modeling programs will only get you close, sometimes as far off as 10hz, that's too much error, and doing it this way allows you to nail the exact frequency you intended to in the modeling.

          Beautiful build by the way. TBO I always treated poplar as "drift wood" ever since I was a kid. It was the wood that we used to fill in corners of cabinets, brace for counter-tops, etc. You have completely changed my outlook on this. Gorgeous boards you have selected for this build and nice craftsmanship.
          Thanks! You know that seems to be the way many do look at it, but the "painted or rainbow" poplar is just one of the most beautiful woods I've ever worked with, it's also a really nice wood to work with as the grain is straight and tight in most cases. Normal yellow poplar is pretty boring, but this stuff with character I've fallen in love with.

          Also love that you used pro-audio drivers! I don't have any technical reasoning or wording to explain why I like them better, but I generally lean towards those of Eminence, Faital, and B&C over the home Hifi stuff. I love a good compression driver in the right wave guide too. Cheers!
          Chris
          You know, I've made it my goal to play with as many different types of drivers as possible to expand my horizons, and pro drives do dynamics, efficiency and transients VERY well, you have to choose your compromises just like with any driver type, but they shine in those areas. I love all the Pro driver builds Iv'e done and will continue to use them as well as HiFi drivers.

          Thanks for the kind words and thoughts Chris!

          Javad
          --
          Javad Shadzi
          Bay Area, CA

          2-Channel Stereo system in the works with Adcom components and 4-way towers

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          • #35
            Thank you for sharing this design. I'm seriously considering building a smaller version for my home theater L-C-R speakers. I started a new thread about it. Should not be hard to find. The challenge is finding tehright smaller woofer than mate up with subs, but match the efficiency of the mid.

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            • #36
              Putting together a build list to see if I can afford to build these (looks very good so far) but your tweeter comes up as "no longer available"!!!

              Do you have a recommendation for a substitute? What xover changes are needed? I don't have equipment to do my own testing so I'm hoping you've got replacement in mind!

              Edit: Folks at PE told me the "Dayton Audio D250T-8 1" Titanium Compression Horn Driver" will work but the bolt-on adapter they listed to go with it is not in stock.
              Last edited by mikec; 06-19-2019, 05:47 PM.

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              • #37
                Could I build this as a PR version? Because of dust, etc, I need the boxes sealed. Would any major XO changes be needed?

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                • #38
                  Awesome build!

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                  • #39
                    Those speakers look amazing, great workmanship! The driver/parts list is not showing up for me to be able to use, could you tell me which woofer, mid, and tweeter/horn you used? Could one of the pre-made 3 way crossovers be used? What is the volume, tuning port diameter and length you used. I want to build something similar. Thank you.
                    YO

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                    • #40
                      Rally Sport | Parts Express Project Gallery

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                      • #41
                        Great work. Sent from my iPhone using Tapatalk

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