Blog Forums DIY Speakers and Subwoofers New Voxel build questions

last updated by tvor-ceasar 5 months ago
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    • #23656
      bsmooth
      Participant

      I’d like to do a Voxel build but without an amp, not sure If thats possible. Also like to do one with a slot port. But I will be building with standard size lumber, specifically 1 x 8(7.25) for the top and bottom, and 1 x 6(5.5) for the sides, mostly to save on cutting.

      Using a box volume of .27 that would be a box about 7.25 x 7 x 16 inches long. Just not sure of port length ?

    • #23657
      tvor-ceasar
      Moderator

      Do you have WinISD? Playing around with that would give you the port length when set to rectangular. Set the width to the max between inside walls and then height you can vary and see how it affects length, port velocity, and first resonance. Some YT tutorials to help you along the way. Most important is the one about entering Driver information. And of course, come back and ask questions.


    • #23664
      tvor-ceasar
      Moderator

      So, if you were to put a slot port that is 7.25″ x 0.33″ x 14.67″, that is equal to a 1.75″ port. Slightly larger than the 1.5″ port that Paul Carmody uses in his build. That would give a bit more wiggle room to help reduce chuffing at the expense of a longer port. And it would still be optimally tuned to 35.7 Hz F3.

      No, I didn’t use WinISD, so I don’t have any other numbers. But this should give you a starting point to work with.


    • #23665
      bsmooth
      Participant

      Just out of curiousity, is WinISD hard to use and which version is the easiest and most stable? Not that I know how to use it, but I was just wondering If it would help with the port size.

      I think the port size width would be only 7.25 minus 1.5(3/4 wood on each side) or 5.75.

      So could I just make the port wider ?

      Maybe I need to download a version of WinISD, but which one?

    • #23666
      tvor-ceasar
      Moderator

      Just like everything, there’s a learning curve. Once you get a couple of hours on it, things start to move more naturally. Really, the biggest thing for me was learning to input the driver information correctly. That’s why I linked you to the search of Nick’s videos. The one on inputting driver info is invaluable.

      Which one to use? Download both versions and try for yourself. Nick likes the older one, I use the newer one. Personal preference. And ask away if you have questions. We’re here to help everyone learn and grow as a community.

      The port – you’d just make the port taller: keep the area the same – 7.25x.33 ~= 5.75x.42, same length.

      The nice thing (or is that a rabbit hole?) about WinISD is that you can go back and forth, changing parameters and see on the chosen graph(s) how things look: bumps, dips, roll-off, freq. resp., power handling, port flow at different power settings, etc., etc.

      Gotta get some sleep. Catch you on the flip side.


    • #23667
      bsmooth
      Participant

      Thanks a lot for the help. I’ll download it and take a look.

    • #23680
      123toid
      Keymaster

      I am all for learning and we will be happy to help you along the way. However if you want one that is already designed, I have plans for sale for the slot port and also my personal favorite the passive radiator.


    • #23691
      bsmooth
      Participant

      Looks like I will need an amp. What I thought were variable output RCA jacks are only preamp output.

      So looks like I am looking at an amp as well. Suggestions ?

      I did see your plans, but I am also changing sizes as well to suit what I need. I also watched your video as well, and it was very helpful. Thanks for your suggestions very much.

    • #23697
      123toid
      Keymaster

      WHat kind of amp are you looking for? SOmething just for the subwoofer or like a 2.1 amplifier? DO you have a budget you are working with?


    • #23706
      bsmooth
      Participant

      Just for the sub itself, maybe something from Parts express, or is there a better place to get one? It doesn’t have to be a powerful amp, just to give a small bass “presence”.

    • #23728
      tvor-ceasar
      Moderator

      Well, the W5 is rated 40/80 watts RMS/Max. At PE, the MONO amps don’t have quite enough oomph, and I’m not talking about the ICE amps. Looking at 2.1 amps, the lowest I’d go would be one of the 15/15/30 watt units, just using the x.1 output. AFAIK, the other outputs should remain ok if unconnected as they are solid state, which usually has no problem being left alone. Now, you could go with one of the 50/50/100 units, just turn it down, and / or go with a lesser power supply.

      To me, the most important thing, after the power ratings, would be the controls available on the amp itself. If it has a separate bass level and main volume control, then that would be icing on the cake.

      Of course, your preferences may vary. 😄


    • #23730
      bsmooth
      Participant

      Is Parts Express the only place I can get a subwoofer amp? I see them on amazon, but many are ones I’ve never heard of.

      BTW nice to see another Rush fan !

    • #23772
      tvor-ceasar
      Moderator

      Man, when the news came out about Neil, it was a crushing blow, but I was so glad he was able to do the farewell tour. We were 2nd to last concert, and I was able to have my whole family with me. All of us are massive fans. They are one of the reasons my wife and I got together – she had Rush albums and I had Dan Folgelberg albums. We knew. 😁 As a matter of fact, my oldest went to his first Rush concert when he was still in the oven. Might explain things….

      As Elliot posted earlier, the YT Video https://youtu.be/mKyulseOoO8 is a good possibility. Link in the comments. IF you are worried about too much power, just use a smaller supply.


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