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  • PORT FOR 8" TANG BAND


    Could one of you guys please see what size and length port might be needed for the W8-1363SA Tang Band 8" Neo Subwoofer (part #264-833)? It will be going in a 0.20 to 0.40 CF box. Not sure about exact box size yet. If its ness., I'll say 0.30 CF.

    Can you use a larger dia to be able to use a shorter port of the same volume?

    Thanks a bunch for your time!

    Jason Landers
    Columbia, SC

  • #2
    Re: PORT FOR 8" TANG BAND


    > Could one of you guys please see what size
    > and length port might be needed for the
    > W8-1363SA Tang Band 8" Neo Subwoofer
    > (part #264-833)? It will be going in a 0.20
    > to 0.40 CF box. Not sure about exact box
    > size yet. If its ness., I'll say 0.30 CF.

    > Can you use a larger dia to be able to use a
    > shorter port of the same volume?

    Thing is, the larger diameter the port, the longer it needs to be. The shorter/smaller ports chuff like mad, due to too much air turbulence. If you want a ported sub with this beast, I'd recommend *at least* a 1.5 ft^3(2 ft^3 is more applicable), and try to tune to 40 Hz or below. This thing moves a TON of air, and does need a minimum of 3" diameter port to sound good. If you are okay with a sealed alignment, then about .3-.4 ft^3 with a boost-modified amp will work as well. About 2.7dB boost at 23Hz would be a good alignment. If you want a PR box, then the only 10" PR's that will work appropriately are the Peerless XLS-10 400g models. If you have any other questions feel free to ask. I have had some time spent on this driver, and like it a lot. In the alignment I used, I get an F3 of 17 Hz, but that is about 3.5 ft^3.
    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


    • #3
      Re: PORT FOR 8" TANG BAND


      > Thing is, the larger diameter the port, the
      > longer it needs to be. The shorter/smaller
      > ports chuff like mad, due to too much air
      > turbulence. If you want a ported sub with
      > this beast, I'd recommend *at least* a 1.5
      > ft^3(2 ft^3 is more applicable), and try to
      > tune to 40 Hz or below. This thing moves a
      > TON of air, and does need a minimum of
      > 3" diameter port to sound good. If you
      > are okay with a sealed alignment, then about
      > .3-.4 ft^3 with a boost-modified amp will
      > work as well. About 2.7dB boost at 23Hz
      > would be a good alignment. If you want a PR
      > box, then the only 10" PR's that will
      > work appropriately are the Peerless XLS-10
      > 400g models. If you have any other questions
      > feel free to ask. I have had some time spent
      > on this driver, and like it a lot. In the
      > alignment I used, I get an F3 of 17 Hz, but
      > that is about 3.5 ft^3.
      > Later,
      > Wolf
      been meaning to ask ya wolf, i use winisd but the on i use doesnt show when it will run out of xmax. what kinda box would you suggest then for the 740c ported of course?

      though i am a fan of these things sealed with BB i tell ya what.

      Comment


      • #4
        Re: PORT FOR 8" TANG BAND


        > been meaning to ask ya wolf, i use winisd
        > but the on i use doesnt show when it will
        > run out of xmax. what kinda box would you
        > suggest then for the 740c ported of course?

        > though i am a fan of these things sealed
        > with BB i tell ya what.

        I just did some fiddlin'! I have a 1.12 ft^3 stuffed box with a 3" port, 13.3" long. If you make a long box, rather than cube, it'll fit well. You're good to about 23 Hz, above 100W, and hitting about 103 dB. F3 of 29 Hz. If you increase the box, it'll bloat, and lower tuning or smaller box makes the port too long. It's the best I can offer! I use Unibox!
        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


        • #5
          Re: PORT FOR 8" TANG BAND


          The thing is I'm using this Tang Band for a highly modified version of the portable Podzuma. I'll be using a 60W x 2 car amplifier to push two 3 1/2 satilites and the 8". Power will come from a 20Ah sealed lead acid.

          I tested this set up with another small box slot-ported 8" with only a 7.2Ah lead acid and My MP3 played ran out of juice after over 4 hours of medium volume play.

          Anyway that's why I have to use a really small box. What would be the aprox. "tuning" or F3 in a sealed box? .3 or .4 ^3 The amp has no BB.

          I'm willing to sacrifice a bit of low end for size, so would a sealed box or a less than optimal ported box with a shorter port be the lesser of two evils?

          Comment


          • #6
            Re: PORT FOR 8" TANG BAND


            > The thing is I'm using this Tang Band for a
            > highly modified version of the portable
            > Podzuma. I'll be using a 60W x 2 car
            > amplifier to push two 3 1/2 satilites and
            > the 8". Power will come from a 20Ah
            > sealed lead acid.

            > I tested this set up with another small box
            > slot-ported 8" with only a 7.2Ah lead
            > acid and My MP3 played ran out of juice
            > after over 4 hours of medium volume play.

            > Anyway that's why I have to use a really
            > small box. What would be the aprox.
            > "tuning" or F3 in a sealed box? .3
            > or .4 ^3 The amp has no BB.

            > I'm willing to sacrifice a bit of low end
            > for size, so would a sealed box or a less
            > than optimal ported box with a shorter port
            > be the lesser of two evils?

            65 Hz in .4 ft^3 sealed. Not very good without bass boost. You most likely will not get much better in a short-ported design.
            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


            • #7
              Re: PORT FOR 8" TANG BAND


              > 65 Hz in .4 ft^3 sealed. Not very good
              > without bass boost. You most likely will not
              > get much better in a short-ported design.
              > Later,
              > Wolf

              Thanks so much for the info. Yall rock!

              JL

              Comment


              • #8
                Re: PORT FOR 8" TANG BAND


                Using a passive radiator,
                The 8" Dayton SD-215 gives similar response for far less money than the Peerless. The only downside is that the Xmax of this passive is less than that of Tang Bans so the max SPL could be limited. The peerless is a better choice but for much more money.

                Comment


                • #9
                  Re: PORT FOR 8" TANG BAND


                  > Using a passive radiator,
                  > The 8" Dayton SD-215 gives similar
                  > response for far less money than the
                  > Peerless. The only downside is that the Xmax
                  > of this passive is less than that of Tang
                  > Bans so the max SPL could be limited. The
                  > peerless is a better choice but for much
                  > more money.

                  The thing is, the Xmax is really very small in this arrangement. You don't use a passive the same size as the active driver, unless it can move TWICE the amount of air that the active driver can. You'll run into trouble otherwise. In addition, if you use 3 or even 4 of the Dayton PR's to makeup for the excursion problems, you would have to add a lot more mass to tune the enclosure low enough to operate/extend well. This places the added mass value above the allowed amount you can add to the PRs without becoming disfunctional. You can use the Dayton DVC12 PR, but it becomes problematic in installation. You don't want a box that is too big, but you have to fit the driver, PR, and amp in that box! It's a shoe-horn at best in this method. The only PR's on the market that can handle the task of pairing with the 1363SA are the Peerless 10" or 12", or the Dayton DVC units. They have enough mass to tune low, and you only have to add a slight amount to make it optimal. The Xmax is sufficient, as compared to all other PR's NOT being sufficient. I've done the models, and these are the only 3 that work. Otherwise you're *popping* PRs. I stand by my findings that a 3-4" port is definitely more reasonable in price, and you get every bit of performance (and more) than you would from the PR approach.
                  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


                  • #10
                    Re: PORT FOR 8" TANG BAND


                    Wolf,

                    Thanks for the added insight. I modeled the arrangement with the larger box and 3" port.
                    It will work but isn't that flat. The only good way to go would probably be with the Peerless passive and then with that the F3 isn't great. This driver is really looking like one that needs some EQ on the low end to work well. But I guess that would be expected. It is an 8" unit and expecting it to what larger drivers can do w/o some assistance is probably not realistic.

                    Steve

                    Comment


                    • #11
                      Here's my alignment...


                      95 ltrs, with a 4" diameter x 28.5" long port. F3 of 17.06, tuning of 17.5, and it's a nice EBS alignment. It won't exceed Xmax +15% within rated power in the bandwidth provided. It's a great alignment that won't chuff until below tuning. If you don't believe me, ask some others here that heard it at Dayton DIY. Shawn will tell you for sure! PR'd, the lowest F3 I got was 29 Hz. I have a writeup I can send your way if you are interested. I might also add, I tested for my T/S, and they do differ slightly.
                      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


                      • #12
                        Re: Here's my alignment...


                        Wolf,

                        Thanks.
                        What are you using to model this??
                        I am using WinISD Pro (alpha) and the alignment you sent doesn't look good to me. About a 7db drop at 30Hz and then a peak just before cutoff. Not pretty. Are you seeing something different??

                        Thanks,
                        Steve

                        Comment


                        • #13
                          Re: Here's my alignment... *NM*





                          (Originally posted by: banningr)

                          Comment


                          • #14
                            Re: Here's my alignment...


                            WINISD allows you to model recangular ports. Lenth is less an issue, and it's easy to avoid port noise.


                            (Originally posted by: banningr)

                            Comment


                            • #15
                              Re: Here's my alignment...


                              Check this out.

                              .75 ft^3 box
                              Dayton SD-315 PR with 3 grams added.

                              It looks pretty darn good in all ways.
                              Unless WinISD Pro is full of s***.

                              Steve

                              Comment

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