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8"dvc w/ 2 passive radiators. done! pics.

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  • 8"dvc w/ 2 passive radiators. done! pics.

    well finally finished. i must give props to shawnA whos triska inspired this project. and to jeff bagby for his wonderful program.

    dayton sd215-88 with dayton 70 watt plate amp. and also 2 8" passive radiators. only using about 1/2 of the power.
    5grams of mass added
    100db
    fb32hz
    f3 30.55
    f6 28.64
    f10 26.85
    54L

    sounds really good . was built to match the recession busters with the same countertop particle board baffle but with 3/4 mdf adoded so 1.5 baffle and top and bottom. the foam is waffle cone packaging,(zero dollars).
    driver 23
    pr 13x2
    mdf 15
    amp 53
    paint 20

    total 127

    pics at photobucket.
    comments welcome.

    http://s413.photobucket.com/albums/p...brother%20sub/
    " To me, the soundstage presentation is more about phase and distortion and less about size. However, when you talk about bass extension, there's no replacement for displacement". Tyger23. 4.2015

    Quote Originally Posted by hongrn. Oct 2014
    Do you realize that being an American is like winning the biggest jackpot ever??

    http://www.midwestaudioclub.com/spot...owell-simpson/
    http://s413.photobucket.com/albums/pp216/arlis/

  • #2
    Re: 8"dvc w/ 2 passive radiators. done! pics.

    Nice work Arlis, you place it vertical or horizontal nice idea. You could even put it in a car if you wanted to. I like it!!

    Later
    Dan

    Comment


    • #3
      Re: 8"dvc w/ 2 passive radiators. done! pics.

      That is killer looking, do you run into excursion issues below tuning?
      Man, I love subwoofer towers.
      Don't listen to me - I have not sold any $150,000 speakers.

      Comment


      • #4
        Re: 8"dvc w/ 2 passive radiators. done! pics.

        i did with 25 grams. that delivered about 27hz fs but i had to turn it waaaayyyyy down. today i lowered or raised it to 32hz with just 5.5 grams. it move a lot of air. i'll test it better latter.
        thanks for the kudos.
        " To me, the soundstage presentation is more about phase and distortion and less about size. However, when you talk about bass extension, there's no replacement for displacement". Tyger23. 4.2015

        Quote Originally Posted by hongrn. Oct 2014
        Do you realize that being an American is like winning the biggest jackpot ever??

        http://www.midwestaudioclub.com/spot...owell-simpson/
        http://s413.photobucket.com/albums/pp216/arlis/

        Comment


        • #5
          Re: 8"dvc w/ 2 passive radiators. done! pics.

          bump
          " To me, the soundstage presentation is more about phase and distortion and less about size. However, when you talk about bass extension, there's no replacement for displacement". Tyger23. 4.2015

          Quote Originally Posted by hongrn. Oct 2014
          Do you realize that being an American is like winning the biggest jackpot ever??

          http://www.midwestaudioclub.com/spot...owell-simpson/
          http://s413.photobucket.com/albums/pp216/arlis/

          Comment


          • #6
            Re: 8"dvc w/ 2 passive radiators. done! pics.

            4 hours is not enough time to expect a new reply. Please only bump threads once daily.

            Looks like nice work, and the higher tuning frequency will probably serve you well with those smaller drivers.
            Best Regards,

            Rory Buszka

            Taterworks Audio

            "The work of the individual still remains the spark which moves mankind ahead, even more than teamwork." - Igor I. Sikorsky

            If it works, but you don't know why it works, then you haven't done any engineering.

            Comment


            • #7
              Re: 8"dvc w/ 2 passive radiators. done! pics.

              Nice work! I have been pondering this driver to go with the little Peerless/Vifa MTs (jkim's crossover design) that I'm completing at the moment. You have a lot more real estate there compared to the Triska. Did you take a big hit in max SPL vs. the lower F3? I have 2 of these right now as part of my Aether experiment. They are in old Wharfedale cabinets that are 1.5 Cu Ft, just as Paul specified in his design. They do sound good running as subs, powered with a pair of the old AudioSource plate amps. But then again, I don't like it very loud here at home anymore, so I'm never really pushing them too hard.

              Tom
              Co-conspirator in the development of the "CR Gnarly Fidelity Reduction Unit" - Registered Trademark, Patent Pending.

              Comment


              • #8
                Re: 8"dvc w/ 2 passive radiators. done! pics.

                thanks. i watched '12 rounds' last night and it did sound good but really had to turn it down. the little guy just does not have much x-max. i'm going to try a couple of other x-over points and see what i think as soon i i get back from camping. vacation this week.

                later.
                " To me, the soundstage presentation is more about phase and distortion and less about size. However, when you talk about bass extension, there's no replacement for displacement". Tyger23. 4.2015

                Quote Originally Posted by hongrn. Oct 2014
                Do you realize that being an American is like winning the biggest jackpot ever??

                http://www.midwestaudioclub.com/spot...owell-simpson/
                http://s413.photobucket.com/albums/pp216/arlis/

                Comment


                • #9
                  Re: 8"dvc w/ 2 passive radiators. done! pics.

                  I like me a good triple sub.
                  Attached Files
                  18hz is scary.

                  Comment


                  • #10
                    Re: 8"dvc w/ 2 passive radiators. done! pics.

                    Originally posted by tom_s View Post
                    Nice work! I have been pondering this driver to go with the little Peerless/Vifa MTs (jkim's crossover design) that I'm completing at the moment. You have a lot more real estate there compared to the Triska. Did you take a big hit in max SPL vs. the lower F3? I have 2 of these right now as part of my Aether experiment. They are in old Wharfedale cabinets that are 1.5 Cu Ft, just as Paul specified in his design. They do sound good running as subs, powered with a pair of the old AudioSource plate amps. But then again, I don't like it very loud here at home anymore, so I'm never really pushing them too hard.

                    Tom
                    Go with the RSS210HF. It's a much lower distortion driver than the SD215. With 1.5 cubic feet, you can make a 16:1 tapered transmission line that would plumb the depths with F3 in the mid 20Hz range. 36" tall, it would make a nice stand for your TM topper. And not having to use multiple PRs makes the extra cost of the RSS easier to stomach.
                    R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
                    Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

                    95% of Climate Models Agree: The Observations Must be Wrong
                    "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

                    Comment


                    • #11
                      Re: 8"dvc w/ 2 passive radiators. done! pics.

                      driver $23, pr's $13 each.
                      " To me, the soundstage presentation is more about phase and distortion and less about size. However, when you talk about bass extension, there's no replacement for displacement". Tyger23. 4.2015

                      Quote Originally Posted by hongrn. Oct 2014
                      Do you realize that being an American is like winning the biggest jackpot ever??

                      http://www.midwestaudioclub.com/spot...owell-simpson/
                      http://s413.photobucket.com/albums/pp216/arlis/

                      Comment


                      • #12
                        Re: 8"dvc w/ 2 passive radiators. done! pics.

                        Nice twist, looks very unique!

                        My Triska does very well for me, but I have a small room, and also no longer care for window rattling SPL, unless I'm at a concert!

                        Good work!


                        Mark
                        You go your way, I'll go mine. I don't care if we get there on time.

                        ~Pink Floyd

                        Comment


                        • #13
                          Re: 8"dvc w/ 2 passive radiators. done! pics.

                          Originally posted by [email protected] View Post
                          driver $23, pr's $13 each.
                          You get 50% more Xmax and a LOT less distortion with the RSS210HF. I still think it's worth it. ;)
                          R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
                          Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

                          95% of Climate Models Agree: The Observations Must be Wrong
                          "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

                          Comment


                          • #14
                            Re: 8"dvc w/ 2 passive radiators. done! pics.

                            i can see going that way next will be starting my all aluminum mtm plus sub in one unit build soon.

                            i am trying some different tunings. at just five grams i saw no movement from the pr's, so i put 90grams on. the graph showed that the x-mas of the driver would be the same as the pr's.right? wrong still barly any movment from them. but does sound good.


                            thoughts?
                            " To me, the soundstage presentation is more about phase and distortion and less about size. However, when you talk about bass extension, there's no replacement for displacement". Tyger23. 4.2015

                            Quote Originally Posted by hongrn. Oct 2014
                            Do you realize that being an American is like winning the biggest jackpot ever??

                            http://www.midwestaudioclub.com/spot...owell-simpson/
                            http://s413.photobucket.com/albums/pp216/arlis/

                            Comment


                            • #15
                              Re: 8"dvc w/ 2 passive radiators. done! pics.

                              Originally posted by [email protected] View Post
                              i can see going that way next will be starting my all aluminum mtm plus sub in one unit build soon.

                              i am trying some different tunings. at just five grams i saw no movement from the pr's, so i put 90grams on. the graph showed that the x-mas of the driver would be the same as the pr's.right? wrong still barly any movment from them. but does sound good.


                              thoughts?
                              You won't notice any movement from the passives until you are putting out signals near the system resonance.
                              R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
                              Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

                              95% of Climate Models Agree: The Observations Must be Wrong
                              "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

                              Comment

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