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  • #16
    Cool. Good luck with your project!
    SideTowers: http://techtalk.parts-express.com/fo...corundum-build
    Totally Flat: http://techtalk.parts-express.com/fo...5-totally-flat
    Plumber's Delight: http://techtalk.parts-express.com/fo...notech-winners
    Linehopper: http://techtalk.parts-express.com/sh...Esoteric-build

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    • #17
      Looks like classic pipe harmonics to me, fortunately the stuffing appears to damp them well. Not to say that it will sound better stuffed though, I'd try it both ways.

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      • #18
        Originally posted by Billet View Post
        Looks like classic pipe harmonics to me, fortunately the stuffing appears to damp them well. Not to say that it will sound better stuffed though, I'd try it both ways.
        I am experimenting with a few different damping techniques and will see what measures and sounds best. I will report back with my results. Sent from my SM-G973U using Tapatalk

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        • #19
          I played with a few different damping/stuffing methods tonight. In the chart below you can see a few different methods. The blue line is an empty cabinet, the purple is cabinet bottom stuffed with polyfil and lined with polyfill batting (too much stuffing, moved port tuning down a few hz), turquoise is bottom stuffed with polyfill, and green is bottom stuffed with mineral wool. The mineral looks the smoothest without affecting the port tuning. I will go with that for now and see how it sounds.
          Attached Files

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          • #20
            Thanks for sharing your test data. Have you taken any near field port measurements? I'd be interested to see how the SPL of the main port tuning frequency shifts up and down as you make these changes.
            SideTowers: http://techtalk.parts-express.com/fo...corundum-build
            Totally Flat: http://techtalk.parts-express.com/fo...5-totally-flat
            Plumber's Delight: http://techtalk.parts-express.com/fo...notech-winners
            Linehopper: http://techtalk.parts-express.com/sh...Esoteric-build

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            • #21
              Originally posted by 4thtry View Post
              Thanks for sharing your test data. Have you taken any near field port measurements? I'd be interested to see how the SPL of the main port tuning frequency shifts up and down as you make these changes.
              I have not done that yet. Just doing the sweeps, you could tell the stuffed and lined test seemed attenuated vs the others. My crossover components are coming tonight, so I may try that later this weekend. I would at least like to test empty vs the mineral wool. Sent from my SM-G973U using Tapatalk

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              • #22
                I have been spending a quite a bit of time with these speakers lately. I ended up with the circuit shown below. I backed off of the attenuation on the full range just like Wolf had originally pointed out. I went from 10ohms to 20 ohms and settled on 15.
                Attached Files

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                • #23
                  I ended up building separate boxes for the crossovers on this speaker. There was not much room in the towers for the crossover. I used some left over lumber and got something started.
                  Attached Files

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                  • #24
                    These speakers have been very fun to listen to. From what I have measured, these speakers have about an 84db sensitivity. What surprises me, is they seem much more lively and dynamic than any speaker with this low of sensitivity. The soundstage is so wide, it almost seems to wrap around you. The center image is locked on in a very wide range of seating positions. The bass is just right. I usually like a little lower extension, but I don't feel I am missing anything while listening to them. They also sound good at low levels, which my other lower sensitivity speakers do not do as well. The highs i thought would be sound a bit rolled off, which these did not. They were a bit surprising how good the top end extension was. The downside to these speakers probably is the fact that they need to be out in the room. You can see where I placed them in the pic below. Next step is figuring out how to finish these to make them not look quite as ugly. That may be tough. I do need to figure it out on these, because I have at least one maybe two friends that want a copy of these after hearing them.
                    Attached Files

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                  • #25
                    White Duratex tinted to match the furniture or walls?

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