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Accuton Cell woofer question

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  • Accuton Cell woofer question

    http://www.accuton.com/produkte/laut...68-9-470-cell/
    Why does this design need such a long former? The basket just seems oddly tall for no real reason

  • #2
    If the vc were shorter the vc and cone would be more prone to rocking. The dome is further away from the spider so needs a longer vc to make up for it. Think of it more as vc to driver surround. I imagine that distance is still close to a cone driver.

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    • #3
      Yes ok but why make the basket so deep that the spider is so far away? Granted the convex cone means a longer former but still it looks unnecessary to my eyes

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      • #4
        If you move the spider closer it loses some of the leverage on the vc that helps keep the vc centered. Your leverage points are where the vc and spider connect and where your cone connects to the frame. They likely also added a little more to the vc since the cone sticks out past the surround which affects the leverage ability somewhat.

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        • #5
          At 497 bucks maybe they wanted it to look weigh like you got something substantial. There so many interactive parameters like placing structural resounaces where they don’t coincide it is hard to say. Maybe they wanted a large space between the enclosure wall and the spider to prevent compression. Air flow behind the cone and the reflections from the magnet structure are factors in the design. Look at the Vifa NE and Scan Speak Illuminator for examples.

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          • #6
            The thick flange is likely due to the 'inner' spider setup. And yes- the longer the former, the less the tilt. BUT- if that was a major concern, why didn't they oppose the input terminals?

            Later,
            Wolf
            "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
            "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
            "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
            "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

            *InDIYana event website*

            Photobucket pages:
            http://photobucket.com/Wolf-Speakers_and_more

            My blog/writeups/thoughts here at PE:
            http://techtalk.parts-express.com/blog.php?u=4102

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            • #7
              A vc lead really shouldn't affect the amount of rock in a well designed woofer as it weighs very little and the lead should only put it's inertial force where it meets the vc. Further most of this force will not be in the sideways direction. The major exceptions would be woven leads or heavy leads on subs.

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              • #8
                It was a major factor in the original TB W5-1138SG, IIRC. It rocked badly, and IIRC, they opposed them, and added a second spider to improve it.

                Later,
                Wolf
                "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
                "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
                "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
                "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

                *InDIYana event website*

                Photobucket pages:
                http://photobucket.com/Wolf-Speakers_and_more

                My blog/writeups/thoughts here at PE:
                http://techtalk.parts-express.com/blog.php?u=4102

                Comment


                • #9
                  Yep. Large excursion, big soft surround, and heavier tinsel leads. Hardly the average woofer.

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