Building a Wooden Speaker for the Guesthouse — Part 1 (Outer Structure)
I’ve been working on a wooden speaker for the guesthouse recently.
Nothing fancy, and definitely not a “studio-grade” thing, just something that feels right in the space — warm wood tone, simple lines, and a shape that doesn’t fight with the rest of the room.
This first post is mainly about the outside build.
The inside, tuning, damping stuff… that will go in the next parts.
1. Cutting the Panels & Basic Fit
I cut the panels by hand first to check proportions.
Some people jump straight to glue, but I like test-fitting things because the wood sometimes gives you a slightly different vibe in real life than what you imagined on paper.
The grain looked cleaner than I expected, so I kept the face I liked for the front baffle.
2. Front Baffle & Driver Opening
The driver hole is where people usually mess up the alignment.
I didn’t go for a perfect CNC cut — router cutting and sanding until the circle didn’t “pull” to one side visually.
3. Side Panels & Clamp Setup
Clamping took longer than it should have, mostly because I misjudged the length of one clamp (this always happens…).
But once it held together, the structure felt surprisingly solid.
The side panels are slightly thicker than typical DIY builds because I wanted a more “object-like” presence rather than something super light.
4. Rounding the Braces (R7 Curve)
Internal wooden brace with rounded R7 edge to improve airflow.
I rounded the edges of the internal braces before sealing the box.
A sharp 90-degree corner can make the airflow hit the brace too hard, which sometimes creates a small reflection or a bit of pressure inside the enclosure.
So I took a little time to soften the edge into about an R7curve.
It doesn’t look dramatic, but smoothing this corner helps the air move more naturally behind the driver.
Small adjustments like this don’t show from the outside, but they make the whole box behave more evenly.
5. Exterior Panels Fully Assembled
Once the last exterior panel went on, it finally looked like a real enclosure.
Up to this point it was just individual boards, but the moment the top plate locked in,
the whole body started feeling solid.
The weight also changed — not too heavy, not too hollow — just enough density that
you can tell it won’t rattle later.
Before moving to sanding, I checked every seam with my hand to make sure
no edge was sticking out. Small gaps can cause small vibrations,
so this part always takes a bit of time.
6. Internal Layout Check Before Sealing
Before closing the back panel, I always do one full check of the inside.
The bracing needed to sit exactly where the driver’s rear wave won’t collide in a bad angle.
I adjusted the position a few millimeters so the airflow would be cleaner
and the back wave wouldn’t create a harsh reflection.
This step won’t show from the outside, but it makes a difference when listening later.
Technical Notes (Maker’s Side Notes)
Internal braces (3 pcs) placed asymmetrically
→ helps break standing waves so one frequency doesn’t “ring” inside the box.
Lower port structure designed for bass balance
→ the port isn’t for deep bass (this driver won’t do that anyway), but it helps the mid-low feel fuller instead of hollow.
Damping material placed unevenly
→ more on the side walls, a small amount high on the back panel.
This reduces harsh reflections without killing all the air.
Corners inside have small fillets / slight R-cuts
→ prevents sharp reflections and keeps the sound smoother.
(You don’t need huge fillets; even small ones help.)
Panel thickness chosen for “feel,” not pure physics
→ thicker side panels make the speaker feel more like furniture, which fits a guesthouse environment well.
None of this is too complicated, and I might adjust things later after some proper listening tests.
Materials Used (Simple English Version)
• Full-range driver (Visaton BG20-8)
• MDF panels (15mm) for the main cabinet
• walnut Plywood panel (optional) for the back side
• Wood glue
• Small silicone seal for tiny gaps
• 14 AWG speaker wire (basic OFC cable)
• Round speaker terminal (banana-plug type)
I’ll do a separate post later once the oil finish is fully cured and the speakers are placed in the guesthouse.
The sound will probably shift again after they settle into the room, so I’ll test them in the actual space on the first floor.
If you’re curious about where they’ll sit, this is the guesthouse where the speakers will eventually live : https://maps.app.goo.gl/JD5YHZWDH1d9c9TZ7
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