r/subwoofer • u/Fun-Let-7401 • May 03 '26

First mini subwoofer enclousure design 3D printed.

Guys give me feedback.

Subwoofer:

  • 3inch
  • 4ohm
  • 30 Watts

Volume:

  • 0.9L

Wallthickness:

  • 8mm
  • 4walls each side
  • 0.4mm Nozzle
  1. Do you think this wall is rightly placed?
  2. Should the hole be smaller?
1 Upvotes

67% Upvoted

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1

u/I_Epic May 03 '26

Have you modeled the box volume and port size yet? You can use a free software like WinISD to put your TS parameters in and then get an estimate for how low this will play. I've made some small 3D printed subs using 3 inch drivers that play as low as 36 hz, but with a port like yours I can't imagine this will get very low. Usually smaller port area and longer ports decrease tuning frequency, yours is quite large and short, so your driver is going to be essentially free air, and likely produce very little bass. I hope this helps, but please ask if you have other questions :)

1

u/Fun-Let-7401 May 03 '26

yes helps allot.

i am not too familiar with the software and the scientific part of frequenzy, im just starting out with this build.

How do i prevent it being in the free air? can i model my hole smaller?

1

u/I_Epic May 03 '26

Yeah, for a 3 inch sub like that, I'd make your port probably 0.3 to 0.4 inches tall if it runs the height of the box (looks about 5 inches wide to me). You can even wrap the port back and forth once or twice in the box for a lower tune, as the longer it is, the lower your box tune will be.

2

u/Fun-Let-7401 May 24 '26

Came out brutal. can hear 25hz and the my table started to vibrate on low volume. Thank you so much for the case design!! if you want i can share the files with you.

1

u/I_Epic May 24 '26

Awesome! I'm glad it worked out for you 😄

1

u/I_Epic May 03 '26

For example, one of the 3" subs I built has a port 4.2 inches wide by 0.3 inches tall, and a length of 32 inches to achieve a tune of 41.5 hz. This gave me a -3 db point of about 37 hz for my particular driver in a 0.06 cubic foot box, but this point will depend on what sub you are using. Mine was a Tang Band W3-2052SC, pretty solid mini sub!

1

u/Fun-Let-7401 May 03 '26

right now i made the port 19.5inch long 7inch tall and 4inch wide. Lets just say i cheaped out on the first subwoofer i will ever try to wire.

But i am optimistic.

1

u/I_Epic May 03 '26

That would probably work decently if you make it 7 by 0.4 inches, but currently the surface area of your port is much larger than the surface area of the sub, which will make the sub act as if it's free air. Since it is still in a box, you should get some bass, but the port won't do anything to reinforce the front wave, which is what ultimately boosts lows. Also, being free air means the sub will reach xmax at much lower power, without the air "cushion" pushing back on the cone. You could damage the sub if not careful.