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Little HiVi Side Table MTM

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  • Little HiVi Side Table MTM

    Seems like a lot of talk on the form about little desktop speakers that pack a punch, must coincide with the back to school idea. Came up with the idea of this little speaker one morning when I could not fall asleep(I work 3rd shift). I was listening to Pandora on my phone and thought that the phone speaker was not cutting it. I have an alarm clock radio but I think my phone speaker is better than that. So, as I laid there thinking about all the small speakers designs out their, the Nano Neo's, Wolf PC, Sprite, and so on. I realised that I wanted small form factor, great bass, and work well with a Lepai 2020. I really wanted to do something that would have an f3 of 40 Hz, I looked at the SB Acoustic SB13, Dayton ND105, and several other drivers. When I modeled the drivers I realised that I would be working with .5 cuft boxes or bigger. That is fine for a bookshelf but for my night stand I wanted a little smaller form factor. I decided to give up the goal of 40 Hz and look at speakers that will play well in a small sealed box and still have a nice roll off.

    I choose the HiVi B3N as that speaker. I liked the way it modeled and was able to achieve an F3 of 80 Hz and F10 of 60 Hz in a .10 cuft sealed box. Because it has a sensitivity of 81dB's I decided to do a MTM setup. I first looked at some of the cheaper tweeters that PE offered and modeled the ND20FA because it had been used in several other low bugget builds. To say the least it took a lot to get it to line up with the HiVi's. Did some more looking and came across the Tang Band 25-1166SJ and that modeled really well. The lower Fs and smoother frequency response helped a lot, the only downside to the 25-1166SJ is the 50 watt rms.

    This is the box I came up with.....

    Click image for larger version

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    And the simulated crossover.....

    Click image for larger version

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    Low pass filter.....

    Click image for larger version

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    High pass filter.....

    Click image for larger version

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    Hoping the wife will by the speakers for my birthday coming up and get them together soon but with DIY Iowa coming up it may be awhile. Also let me know what you guys think.
    If we all reacted the same way, we'd be predictable, and there's always more than one way to view a situation.
    What's true for the group is also true for the individual. It's simple: Overspecialize, and you breed in weakness.
    It's slow death.

    //Burn n' Die//Dream Weaver//Maximus//ABC Bookshelf Speakers//Dayton Twin Towers

  • #2
    Re: Little HiVi Side Table MTM

    Sounds familiar...
    http://s18.photobucket.com/user/wolf...?sort=3&page=1

    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: Little HiVi Side Table MTM

      Originally posted by Wolf View Post
      Very nice Wolf, I really wanted to do something with the Neo drivers but something just drawed me to the HiVi's.

      I am debating about getting the crossover parts before hand because I used some CLIO files I downloaded from Zaphs website. I might just wait till after I get some in box measurements before ordering parts.
      If we all reacted the same way, we'd be predictable, and there's always more than one way to view a situation.
      What's true for the group is also true for the individual. It's simple: Overspecialize, and you breed in weakness.
      It's slow death.

      //Burn n' Die//Dream Weaver//Maximus//ABC Bookshelf Speakers//Dayton Twin Towers

      Comment


      • #4
        Re: Little HiVi Side Table MTM

        Those B3N/S' are nice drivers. I have a full range pair as well as an MTM with the Dayton ND20-6: http://techtalk.parts-express.com/sh...Dayton-Neo-MTM Curt C built this design also with the same drivers: http://speakerdesignworks.com/Scrappy.html Paired with a sub they do *very* well. That TB tweeter is crossed high enough to sound decent, but the sticky dome on mine got real dirty, real quick and was a pain to clean, so I gave them away. If you have pets, these may be better and cross a bit lower:

        http://www.parts-express.com/pe/show...umber=264-1002
        http://www.parts-express.com/pe/show...umber=264-1122
        http://www.parts-express.com/pe/show...umber=264-1028

        Comment


        • #5
          Re: Little HiVi Side Table MTM

          Originally posted by chrisn View Post
          Those B3N/S' are nice drivers. I have a full range pair as well as an MTM with the Dayton ND20-6: http://techtalk.parts-express.com/sh...Dayton-Neo-MTM Curt C built this design also with the same drivers: http://speakerdesignworks.com/Scrappy.html Paired with a sub they do *very* well. That TB tweeter is crossed high enough to sound decent, but the sticky dome on mine got real dirty, real quick and was a pain to clean, so I gave them away. If you have pets, these may be better and cross a bit lower:

          http://www.parts-express.com/pe/show...umber=264-1002
          http://www.parts-express.com/pe/show...umber=264-1122
          http://www.parts-express.com/pe/show...umber=264-1028
          I had read about people having problems with dust sticking to the dome and I do have two boxers so there would be a lot of that.

          I did consider the Vifa BC25 as an option for the tweeter but it kept sitting on back order on PE website so I moved on to see what else was available. I went ahead and dropped in a SPL trace of the Vifa tweeter in place of the TB tweeter and this is the result. Decent response and was surprised at how interchangeable these two tweeters are.

          Click image for larger version

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          If we all reacted the same way, we'd be predictable, and there's always more than one way to view a situation.
          What's true for the group is also true for the individual. It's simple: Overspecialize, and you breed in weakness.
          It's slow death.

          //Burn n' Die//Dream Weaver//Maximus//ABC Bookshelf Speakers//Dayton Twin Towers

          Comment


          • #6
            Re: Little HiVi Side Table MTM

            Nice phase tracking in the last sim, the whole thing looks good!

            Comment


            • #7
              Dream Weaver

              Came up with a name for the speakers.........

              Dream Weaver



              Giving how I came up with the design I figured the title matched.

              PE finally got the HiVi drivers in stock so I was able to build the boxes. I need to mount the drivers and do some final measurements before I order crossover parts.



              If we all reacted the same way, we'd be predictable, and there's always more than one way to view a situation.
              What's true for the group is also true for the individual. It's simple: Overspecialize, and you breed in weakness.
              It's slow death.

              //Burn n' Die//Dream Weaver//Maximus//ABC Bookshelf Speakers//Dayton Twin Towers

              Comment


              • #8
                Re: Dream Weaver

                loving these.....
                Builds - C-Killa - Speedsters - LithMTM - Talking Sticks - Pocket Rockets - Khanspires - Dayton RS Center - RS225/28A - Kairos - Adelphos - SEOS TD12X - Dayton 8 - Needles - 871S - eD6c - Overnight Sensations - Tritrix (ported) - Lineup F4 - Stentorians - The Cheapies - Tub Thumpers - Barbells - Tuba HT - Numerous subwoofers - probably missing a few...... :p

                Comment


                • #9
                  Re: Little HiVi Side Table MTM

                  Rear mount hivi's, will look great.

                  Comment


                  • #10
                    Re: Little HiVi Side Table MTM

                    did/are you going to do a roundover on the tweeter faceplate?

                    रेतुर्न तो थे स्रोत
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                    in war, victory . . . in peace, vigilance . . . in death, sacrifice.

                    Comment


                    • #11
                      Re: Little HiVi Side Table MTM

                      Originally posted by greywarden View Post
                      did/are you going to do a roundover on the tweeter faceplate?
                      I am going to try, it is only a 10$ tweeter but I still don't want to mess it up.
                      If we all reacted the same way, we'd be predictable, and there's always more than one way to view a situation.
                      What's true for the group is also true for the individual. It's simple: Overspecialize, and you breed in weakness.
                      It's slow death.

                      //Burn n' Die//Dream Weaver//Maximus//ABC Bookshelf Speakers//Dayton Twin Towers

                      Comment


                      • #12
                        Re: Little HiVi Side Table MTM

                        Trimmed the tweeters today and finished assembling them. Going to do some measurements tonight but thought I would post some speaker porn.













                        Sorry they are cell phone picks but it is quick and dirty.
                        If we all reacted the same way, we'd be predictable, and there's always more than one way to view a situation.
                        What's true for the group is also true for the individual. It's simple: Overspecialize, and you breed in weakness.
                        It's slow death.

                        //Burn n' Die//Dream Weaver//Maximus//ABC Bookshelf Speakers//Dayton Twin Towers

                        Comment


                        • #13
                          Re: Little HiVi Side Table MTM

                          No baffle round over?
                          John H

                          Synergy Horn, SLS-85, BMR-3L, Mini-TL, BR-2, Titan OB, B452, Udique, Vultus, Latus1, Seriatim, Aperivox,Pencil Tower

                          Comment


                          • #14
                            Re: Little HiVi Side Table MTM

                            I was curious to this as well.....
                            Builds - C-Killa - Speedsters - LithMTM - Talking Sticks - Pocket Rockets - Khanspires - Dayton RS Center - RS225/28A - Kairos - Adelphos - SEOS TD12X - Dayton 8 - Needles - 871S - eD6c - Overnight Sensations - Tritrix (ported) - Lineup F4 - Stentorians - The Cheapies - Tub Thumpers - Barbells - Tuba HT - Numerous subwoofers - probably missing a few...... :p

                            Comment


                            • #15
                              Re: Little HiVi Side Table MTM

                              Still debating about the edges, I am thinking about doing a 1/2" round over or a 45 degree chamfer.
                              If we all reacted the same way, we'd be predictable, and there's always more than one way to view a situation.
                              What's true for the group is also true for the individual. It's simple: Overspecialize, and you breed in weakness.
                              It's slow death.

                              //Burn n' Die//Dream Weaver//Maximus//ABC Bookshelf Speakers//Dayton Twin Towers

                              Comment

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