To install a recone the easy way, you’re going to need a turntable (a.k.a. “Lazy Susan” unless your significant other’s name is “Susan”). These turntables come in handy for cleaning frames before a recone, and applying glue to frame whenever you’re reconing your subwoofer. By keeping the frame in motion, you can get a smooth, consistent bead for glue joints.
When you’re not using it for recones, it will also make cake decorating much easier for Susan.
What you will need:
- A piece of MDF or plywood (you can use circle cutouts from your enclosure)
- Lazy Susan bearing hardware
- 1 Rubber foot that will fit in the bottom hole of the motor
- A piece of an old surround, or craft foam
- 4 low profile, ½-inch screws and a 1, 1-inch screw
- Measuring tape
- Utility/razor knife
- Drill and bits
- A nail
- Carpenter’s square or ruler
- Jigsaw (or router and circle jig)
- Skinny scrap of wood (paint stirrer’s are about the right size)
- CA glue kit
- Carpet or non-slip covering material
Steps to Recone Your Sub
- Mark the center of each edge of your piece of wood. Since I’m using a 4-inch lazy Susan, I also mark two inches away from each center mark. Draw a line to connect the center marks on opposite edges. These lines will cross at the center of the board. If you’re starting with a circular board, you’ll need to draw 2 straight lines near opposite edges of the circle. If you remember geometry class, you’ll need to bisect these lines using a compass, then draw a line perpendicular to each line at the midpoint. These lines will cross in the exact center.
- Line up the lazy Susan bearing. You should see the lines you drew through all four screw holes. Mark where you’re going to add screws.
- Drill a hole through the center of your board. You’ll be sticking the nail through, so make sure it’s big enough. If you’ll be using a router to cut out the circle, make the hole the right size for your router’s pin.
- Make a make-shift compass to draw a circle. Make two marks on your long skinny piece of wood at 1 inch and 5 inches from the end (this gives us the 4″ radius of our circle). Drill a small hole for the nail at the 1-inch mark. Drill a hole a pencil can fit into at the 5-inch mark. Place the skinny board on the big board and make the nail go into the center hole you drilled earlier.
- Cut out the circle. With a jigsaw, the edges may be a bit rough. Use 60 or 80 grit sandpaper to shape up your circle and get rid of splinters if you’re using plywood.
- Mount the lazy Susan bearing. Turn one side of it 45 degrees from the other so you can get to the mounting holes. Grab your drill and screw that Susan down with the 4 short screws.
- Add rubber feet to the lazy Susan bearing. Grab that little piece of old surround, craft foam, or weatherstripping. Cut it into 4 small squares. Flip your turntable over, and give the corners of the Susan a light scuffing so the glue sticks better. Put some glue on the squares and stick them on the Susan.
- Glue on carpet (or other covering). Once the glue’s dry, flip it back over and grab your glue. Add glue starting at the center moving toward the edge as you turn the turntable. Use something flat to spread the glue in a more even layer. Lay your carpet over the glue so it overhangs the edge. Once the glue is dry, flip the turntable and trim away the excess.
- Add a rubber foot to the center. The rubber foot will sit in the center hole of the motor and keep it from moving around. Don’t get a rubber foot that’s too big for the hole in your motor. Grab a rubber foot and the one-inch screw from earlier. If you can’t feel the center hole, just poke a nail through from the back. Screw down the rubber foot.
That’s it! You’ve created a versatile turntable you can use for years to come.