10 Inch Speaker Cabinet

This was my first guitar amp speaker experiment. Nothing special at all, arbitrary sizes. What I focused on was to build it very sturdy and to build it deep. This is to minimize low frequency cancelation of air traveling from the front of the baffle to the back - better bass response. To aid strength, I decided to use box joints and to create slots in the box so that the baffle is built into the box rather than screwed to it. Of course this necessitated building a box joint jig, because how else would I create nice consistent joints? I copied the design from Leeway's Workshop and only losely followed the measurements. See the box joint jig story here. My original wood of choice was an African hardwood called Padouk, but I whimped out because I was afraid I would ruin the wood without previous practice. I ended up using MDF because it's dense and cheap. Little would I know what kind of mess cutting the stuff would make. I think I still have an 1/8" layer of dust in my garage. For the speaker I used a Jensen P10R Vintage Series Speaker. It can handle 25W and supposedly has that nice vintage sound because it's similar to the speakers on early Fender amps.
Front View (Complete)Front View (Complete)
When I glued up the pieces, everything fit together so tightly that I needed a rubber mallot to assemble the box and it didn't need to be clamped while the glue dried. I went through all this trouble to create a solid box. I was very pleased with the results; the box is extremely rigid. I then went ahead and cut the speaker hole and beveled the inside opening with a quarter round bit on my router.
Sanded FrontSanded Front
After the box had set, the "fingers" from the box joint protruded a little. I sanded these down even with the surface of the box with an orbital sander and I also softened up the edges of the speaker box. Last step before painting was to fill the holes between fingers and hole due to the slot cuts with sandable filler. After drying I sanded with 150 grit to get rid of remaining unevenness.
Sanded Box JointSanded Box Joint
I decided to paint the box using a stone textured spray paint to give that uneven durable surface that a lot of guitar speaker cabinets have. Maybe for my next speaker box, I will try that rubber pickup truck bed liner spray paint. Luckily, I managed to get all eight screws into the speaker, but later I also had to add screws in the corners of the grille to prevent buzzing at low frequency notes.
Rear View (Complete)Rear View (Complete)
Check out the complete gallery here.

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