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Ferrite Versions of TB Drivers!

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  • Ferrite Versions of TB Drivers!

    Just got an email from Tang Band that basically says that they are responding to the wicked increase in neodymium prices by adding a ferrite version to many of their popular drivers:

    W3-532SQF
    W3-881SJF
    W3-926SDF
    W4-1320SIF
    W4-1320SJF
    W4-1337SDF
    W4-1052SDF
    W5-1138SMF
    W5-1611SAF
    W6-1139SIF
    W8-1393SBF

    The "F" at the end of the model number means that it is the 'ferrite' version of that particular driver.

    I wonder how many of these PE will end up carrying? I bet it will almost cut the cost by at least a third, so it's a pretty good move in my opinion. I know that some of the TB drivers were looking a bit pricey for what they were.

    TomZ
    Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
    *Part 2 *Gluing multiple curved laminations of HDF

  • #2
    Re: Ferrite Versions of TB Drivers!

    Ferrite versions of their little subwoofers would be very popular, I bet (hint, hint PE)
    Don't listen to me - I have not sold any $150,000 speakers.

    Comment


    • #3
      Re: Ferrite Versions of TB Drivers!

      I just saw this on the Tang Band Facebook page. I think this is really cool of them. They could have just kept everything the way it is and made it easier on themselves. This is a great example of a company truly caring about it's customers. Good job Tang Band.

      Comment


      • #4
        Re: Ferrite Versions of TB Drivers!

        I'll need to give that ferrite version of the W4-1052SD a try in my Whetstones. All the below drivers are carried by Parts Express; I wonder how much of this is due to pressure from PE to produce special ferrite versions.
        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


        • #5
          Re: Ferrite Versions of TB Drivers!

          Originally posted by John_Frum View Post
          This is a great example of a company truly caring about it's bottom line.
          Fixed it for ya'

          TB isn't stupid. Speakers have a very elastic demand curve. Double or triple the price of your product (regardless of the cause) and sales are going to go elsewhere. Econ 101...

          Comment


          • #6
            Re: Ferrite Versions of TB Drivers!

            Originally posted by Dave_W View Post
            Double or triple the price of your product (regardless of the cause) and sales are going to go elsewhere.
            Especially on luxury items.

            Personally, I wonder how much of this is really due to price increases on neo. We buy a lot of Chinese product with a high neo content at work and have seen NO price increase. Maybe soon, I don't know, but it seems odd.

            Zach

            Comment


            • #7
              Re: Ferrite Versions of TB Drivers!

              That's very good news. First Accuton switches back to ferrite, now TB.

              Me, I never saw the real advantage to neodymium other than the fact that it's lightweight. (which in itself seems strange to me, since a lot of folks by audio gear "by the pound")
              Isn't it about time we started answering rhetorical questions?

              Paul Carmody's DIY Audio Projects
              Twitter: @undefinition1

              Comment


              • #8
                Re: Ferrite Versions of TB Drivers!

                Originally posted by Dave_W View Post
                Fixed it for ya'

                TB isn't stupid. Speakers have a very elastic demand curve. Double or triple the price of your product (regardless of the cause) and sales are going to go elsewhere. Econ 101...
                I agree, if they thought their revenue would remain the same they would have not retooled (assembly line or people) or for the change--it all comes down to profit margins... It just so happens that what is good for DYI is good for Tang Band profit, this time.
                Jason


                "In my opinion, there are more tactful ways to state your opinion."

                Comment


                • #9
                  Re: Ferrite Versions of TB Drivers!

                  I remember reading a paper a few years ago on flux modulation as a source of distortion in loudspeakers and I recall that neodymium outperformed ferrite in that regard. That and the overall size of the magnet structure as a source of early reflections make neodymium superior IMO.

                  Like most others, I tend to vote with my wallet and it is hard to argue that the small performance advantages that neo provides over ferrite is worth the cost. It will be interesting to see the prices of the new ferrite alternatives and how they measure up with respect to their neo predecessors.

                  -David

                  Comment


                  • #10
                    Re: Ferrite Versions of TB Drivers!

                    Originally posted by Paul Carmody View Post
                    That's very good news. First Accuton switches back to ferrite, now TB.

                    Me, I never saw the real advantage to neodymium other than the fact that it's lightweight. (which in itself seems strange to me, since a lot of folks by audio gear "by the pound")
                    Next week I'm buying a pair of Bandor 50mm full range units (in the UK) and I was told that they will have a new Neo version out soon. The designer says its a very different driver from the current ferrite versions (in a good way) so maybe there are advantages in some cases.

                    Comment


                    • #11
                      Re: Ferrite Versions of TB Drivers!

                      Originally posted by Paul Carmody View Post
                      Me, I never saw the real advantage to neodymium other than the fact that it's lightweight. (which in itself seems strange to me, since a lot of folks by audio gear "by the pound")
                      Neo magnet structures can be smaller, for fewer reflections from the motor structure back onto the cone.
                      --
                      "Based on my library and laboratory research, I have concluded, as have others, that the best measures of speaker quality are frequency response and dispersion pattern. I have not found any credible research showing that most of the differences we hear among loudspeakers cannot be explained by examining these two variables." -Alvin Foster, 22 BAS Speaker 2 (May, 1999)

                      Comment


                      • #12
                        Re: Ferrite Versions of TB Drivers!

                        MUAHAHAHAHAHAHAHA!!!

                        http://www.tb-speaker.com/detail/0624_11/w6-1139sif.htm
                        http://www.tb-speaker.com/detail/0624_11/w5-1138smf.htm
                        http://www.tb-speaker.com/detail/0624_11/w8-1363sbf.htm

                        http://www.tb-speaker.com/detail/0624_11/w3-881sjf.htm
                        http://www.tb-speaker.com/detail/0624_11/w3-926sdf.htm
                        http://www.tb-speaker.com/detail/0624_11/w4-1052sdf.htm
                        http://www.tb-speaker.com/detail/0624_11/w5-1611saf.htm
                        http://www.tb-speaker.com/detail/0624_11/w4-1320sif.htm
                        http://www.tb-speaker.com/detail/0624_11/w4-1320sjf.htm
                        http://www.tb-speaker.com/detail/0624_11/w4-1337sdf.htm

                        Unfortunately, the W3-1364 is not on the product list any longer. I think they phased it out.

                        Otherwise- I like the looks of the stouter magnet drivers.

                        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:
                        https://app.photobucket.com/u/wolf_teeth_speaker

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

                        Comment


                        • #13
                          Re: Ferrite Versions of TB Drivers!

                          Originally posted by Paul Carmody View Post
                          That's very good news. First Accuton switches back to ferrite, now TB.

                          Me, I never saw the real advantage to neodymium other than the fact that it's lightweight. (which in itself seems strange to me, since a lot of folks by audio gear "by the pound")
                          Shipping costs!!! The weight savings is very substantial.

                          You can always add mass to the enclosure to get the weight (and inertia) up.
                          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: Ferrite Versions of TB Drivers!

                            Now that I think of it, unless TB plans on building massive ferrite motor structures for all these drivers that used to use neodymium, there could be a fairly wide gulf in performance between the neo and ferrite version of a similar driver. Neo does allow a compact motor structure for a given amount of flux, but it also allows motor designs with higher flux than a ferrite motor of practical size. Take a look at the TB underhung woofers for an example - their motors are monstrous, and represent probably the largest ferrite motor that can be hung from the back of a driver. (Actually, take a look at the AE Speakers TD6 - now that's a ferrite motor!) An equivalent neodymium motor could be smaller, and an even more powerful motor could be achieved in a practical size using neo.

                            There are a few drivers in the list of TB drivers getting ferrite versions where I think a more comprehensive re-thinking of the driver is in order to maximize the performance potential of ferrite. The W3-926, W4-1052, and W5-1611 are all full-range drivers that use poly cones. Poly is actually a great material for a full-range driver, as I've found, because it has excellent self-damping. However, that self-damping also saps the driver's sensitivity, and poly cones tend to also be heavier than a paper cone of equivalent stiffness, which further depresses sensitivity. I'd rather see drivers like the W5-1611 and W3-926 get a new version with a bamboo cone, and forget about a ferrite version of the W4-1052.

                            I guess I'll just have to wait and see what Tang Band comes up with. It could be that the sensitivity penalty with most of the drivers getting ferrite motors is insignificant.

                            (Addendum: Gee, that's what I get for hanging around on Tech Talk while there's a Wolf afoot at the same time. I'll have to check those out. So far so good for my favorite drivers.)
                            Last edited by Taterworks; 09-03-2011, 10:04 AM.
                            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


                            • #15
                              Re: Ferrite Versions of TB Drivers!

                              Originally posted by Taterworks View Post
                              (Addendum: Gee, that's what I get for hanging around on Tech Talk while there's a Wolf afoot at the same time. I'll have to check those out. So far so good for my favorite drivers.)
                              Yeah- I thought they were similar enough too....
                              Heh,
                              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:
                              https://app.photobucket.com/u/wolf_teeth_speaker

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

                              Comment

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