Speaker enclosures……A rabbit hole…

Blimey, who’d have thought……

Back in the old days, it was as simple as ‘buy a speaker’ , shove it in a box and voila…….


Nowadays though…………


There’s quite a few, including the following types…………

  • Sealed enclosure
  • Infinite baffle
  • Open Baffle
  • Free-air
  • Bass reflex
  • Ported
  • Vented
  • Bandpass
  • Transmission Line
  • Folded Horn
  • Isobaric

Each has different properties, suited for different things……some are as easy as ‘shove it in a box’, others need complex enclosure geometry and some math………

Now, considering I have 5 speaker drivers waiting to be hooked up, own two 3D printers (and a CNC), Know a bit about Fusion360 and have a penchant for overthinking and overcomplicating stuff (hey, where’s the fun when it’s simple!?)…..I figured, lets learn a little bit about speaker enclosure design……

Turns out, there’s quite a few youtube videos……….

One in particular from a channel that I’d already subscribed to a few months ago…….HexiBase – Can a 3D printed enclosure Get low

Look at the size of that box!……..It uses a Folded Waveguide type resonance chamber for the enclosure…..which appears very similar in design to a ‘Transmission line’ style of speaker.

….Challenge accepted….I’m going to build a small Transmission line speaker!

Author: Bleugh

Early Fourties, Wife, two kids in primary school. Both of us work full time...5 years now we’ve been Back in Blighty after a decade away...It's a new country for everyone! Still finding time to tinker!

4 thoughts on “Speaker enclosures……A rabbit hole…”

    1. I wonder… if one could create a hybrid Folded Horn + Transmission Line Design. So you work with what you’ve already done and then bring out a folded horn fitting on the front of it. Your current design presents the speaker on the left-hand side. The folded horn facade then presents a hole on the right-hand side with concealed horn path.


      1. That’s a good idea!
        I’ve been trying to figure out the ‘end game’ aesthetics. having a slightly wider speaker with a large side exit horn could take care of that.
        …but, I’ll need to read up on horn dimensions and design now!
        Another thought springs to mind though, a wide but short cylinder speaker with a spiral leading to the horn . Picture a coin, the speaker is located in one edge of the coin and the waveguide spirals inwards to come out of the head side of the coin!

        Liked by 1 person

  1. Does it have to be a single spiral waveguide? What if there are multiple spirals offset by enough distance so that there’s enough material between them? (Imagine dropping six spaced-apart heavy spheres into a cylindrical slowly-spinning clear vat of something which would leave trails in the material as they drop.) So basically, the entire outer shell is a long winding path/maze as a separate chamber. The simple inside remaining cylindrical chamber then could also be shaped as well. The shell path would be for bass and the inside chamber for treble.


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