Speaker End Table

by makeorbreakshop in Workshop > Furniture

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Speaker End Table

Building a Bluetooth Speaker into a Side Table

Almost one year ago I built my first piece of "fine" furniture (at least for me). It was an end table made from solid walnut with traditional joinery. One of the ideas was to have a removable drawer that I could replace with a Bluetooth speaker. Well after a year that idea is a reality!

Tools & Materials

Cut Down the MDF Box

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The main speaker is built from 3/4in MDF. This is cut from a sheet down to a strip on the table saw. It is then cut to width on the miter saw.

Cut the MDF Strips at an Angle

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Using an angle gauge the table is set up to cut at a 45 degree angle. All four sides of the box are cut on the table saw.

Glue the Box Assembly Together

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The box is glued together by first laying all the pieces upside down on a work surface. I then added glue and folded the pieces together. The box was secured with tape and clamps while the wood glue dried.

Spray Paint the Box Black

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The box body is spray painted black on all sides.

Prepare the Walnut Front Face

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The front face of the speaker is made from 3/4 in walnut. This was a rough cut piece so I got it flat and square on the planer and jointer. The walnut front was then cut to size on the table.

Design the Front Face in Fusion 360

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This step could be skipped if you don’t have a CNC but I wanted to create a unique 3D design. I used Fusion 360 to mimic the effect of water rippling from the speaker's face.

Also since I didn’t have a large enough bit to cut out the speaker holes these were designed into the model as well.

Cut the Front Face on a CNC

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The front face was cut in two different passes. The first was an adaptive facing operation using a 1/4 in uncut bit. The second operation refined and smoothed the design using a ball noise bit.

Wire Up the Electronics

So I won’t go into great detail here on the wiring on the electronics. I bought a speaker kit from Kirby at Kirby Meets Audio. I’m using his Fawn speaker plans and speaker kit. He provides great plans to put it all together.

But a quick overview….

Attach the Woofer and Tweet to the Front Face.

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The subwoofer is screwed into the speaker face. The tweeter can be friction fit into place. This could also be secured with super glue.

Wire Up the Crossover

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These plans include a passive crossover design. The basic idea is that through inducers, resistors and capacitors you can split the audio signal for your different sized speakers. These parts were soldered together and I used heat shrink and electrical tape to secure all the joints

Finally, attach the volume knob to the front face

Cut Out the Speaker Back

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The back is cut from a piece of MDF and painted black. I used a CNC to cut a hole large enough for the speaker out ports.

The back electronics are screwed into place. They include a power port, 1/16 audio jack and power switch.

Drill Rear Components

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Holes were drilled for the rear components with their appropriate sized bits. I then used a Forstner bit to remove materials around those holes from the back so that the electronics could fit into place.

Secure Soundboard Into Place

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I didn’t have any spacer on hand so I secured the soundboard directly to the back of the speaker back. I plan to go back and insulate this later but for not it is seeming to work.

Finish the Front Face

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This step should have been done before I wired up the electronics. I was able to remove them enough so I could oil the front speaker’s surface. I used a few coats of Generals Arm-R-Seal. Then for the speaker body, I used a several coats of shellac.

Glue the Front Face

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Wood glue was used to attach the front face to the speaker box. This was clamped into place so that it could dry.

Attach the Back Panel

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The back panel is attached with countersunk screws. This allows me to open the speaker up if anything ever needs to be repaired or modified in the future.

Adjust the Reveal of the Speaker

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That’s It!

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And that’s it! I’ve been using an Amazon Echo with the speaker it is working great!