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  • Re: Flex Your PCD Mettle:

    I would LOVE to build 3 of these but have no idea how/where to start. I was thinking I would use the Selenium D220Ti-OMF-8 For HF but what should I use for the mid range horn?

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    • Re: Flex Your PCD Mettle:

      Originally posted by giverago View Post
      I would LOVE to build 3 of these but have no idea how/where to start. I was thinking I would use the Selenium D220Ti-OMF-8 For HF but what should I use for the mid range horn?
      EconoWave is 2-way; you don't need the tweeter horn.

      D220Ti-OMF is bolt-on. Wait for Parts Express to get the QSC 152i waveguides available for us again, or begin with the standard EconoWave combination of the thread-on D220Ti and Dayton H6512 waveguide:

      http://www.parts-express.com/pe/show...number=270-318

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      • Re: Flex Your PCD Mettle:

        Zilch if I have asked this question once before I apologize, but what are the efficiencies of the Deluxe and the SR? Are the 100db/watt systems?
        My simple speaker project
        My simple subwoofer project

        The Inlaws Hometheater

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        • Re: Flex Your PCD Mettle:

          If you check Pete's recent posts in this thread, he estimated them, and I suggested that, since all builds are done under the same conditions here, the others may be gleaned by comparing the final FR curves in the Summaries.

          There are no 100 dB EconoWaves yet built and posted in this thread, no; a couple MAY be approaching 95 dB, and might be pushed higher using "0.5" alignments to minimize BSC, and JBL's FAT™ filter topology could garner a couple of dB more in some instances. I have conceptually introduced that in the E-Wave Mini thread, and may be able to provide further details for efficiency hounds once we complete some TWW builds over there.

          EconoWave itself, the HF section, is not the limiting factor in this; it'll get to 100+ dB, no sweat....

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          • Re: Flex Your PCD Mettle:

            Well I was looking at the SR and the lowest efficiency on that system is the woofer at 97db/watt.


            I was more curious if the crossover reduced the efficiency somehow. I am thinking about doing a 7 channel setup with SR's all around. The mini's look to be about the same price as the SR just a little less, spend a little more get a little more I always say.



            Those dayton woofers sure are heavy though, holy crap I remember hanging my 10" surrounds and thinking these shouldn't be that heavy.
            My simple speaker project
            My simple subwoofer project

            The Inlaws Hometheater

            Comment


            • Re: Flex Your PCD Mettle:

              Originally posted by stgdz View Post
              I am thinking about doing a 7 channel setup with SR's all around.
              Pleased with them SRs, are ya? ;)

              Yes, the lowpass filter typically includes some baffle step compensation and also flattens the response. Look back to the raw driver curves to see how much efficiency that eats up....
              Last edited by Zilch; 11-30-2010, 03:56 AM.

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              • Re: Flex Your PCD Mettle:

                Originally posted by Zilch View Post
                Pleased with them SRs, are ya? ;)
                Haven't built any yet. The difference between the SR and the original is the waveguide and the woofer correct(with a couple of crossover changes)? Just running the numbers and the SR's look like the best bang for the buck speakers that i can build for the inlaws.

                Not sure if I would build them for myself though ;)
                My simple speaker project
                My simple subwoofer project

                The Inlaws Hometheater

                Comment


                • Re: Flex Your PCD Mettle:

                  Saw this on another forum - perhaps it's worth a try building an Econowave using this box instead, or are these prefabbed poly boxes with built-in horns frowned upon?

                  http://www.erseaudio.com/Specials/PSB-12
                  Brian Steele
                  www.diysubwoofers.org

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                  • Re: Flex Your PCD Mettle:

                    When they are MantaRay generation diffraction horns, not waveguides, they are frowned upon, yes....

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                    • Re: Flex Your PCD Mettle:

                      More HolmImpulse:

                      I improved the FR by changing the xover as I took many, many measurements.
                      (using 1/6 oct smoothing)




                      Needs more work. See my post #993 on page 50.
                      But it seems to be getting there slowly.

                      Subjectively it sounds very good. My best effort in over 20 years of on and off speaker building.

                      Comment


                      • Flex It Round #8.0 - EconoWave Mini S-8:

                        Beta-8A and Selenium D220Ti on Selenium HM17-25 waveguide in diminutive (0.53 cuft.) cab, here prototyped using a modified (forward-mounted baffle and edge roundovers) KLH-24:



                        This design was recently worked up in the E-Wave Mini thread, beginning here:

                        http://techtalk.parts-express.com/sh...39#post1693239
                        Attached Files
                        Last edited by Zilch; 12-06-2010, 01:52 AM.

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                        • Attached Files

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                          • Flex It Round #8.0 - EconoWave Mini S-8:

                            The files:
                            Attached Files
                            Last edited by Zilch; 12-05-2010, 07:06 PM.

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                            • Re: Flex Your PCD Mettle:

                              http://www.parts-express.com/pe/show...number=260-140

                              Zilch, have you ever considered using one of the dayton 2 channel crossovers? I know you helped reece with his line array build. Sure it may not be ideal but it may help some people that are not interested in soldering.

                              I'm just bouncing ideas around.
                              My simple speaker project
                              My simple subwoofer project

                              The Inlaws Hometheater

                              Comment


                              • Re: Flex Your PCD Mettle:

                                Gonna have to solder (or wire-nut) anyway; review the 13 project summaries thus far posted in this thread (go to the first post for links to them), and you'll see that each and every crossover is custom, and different....
                                Last edited by Zilch; 12-06-2010, 02:03 AM.

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