Portable Media Players are great for listening to music on the go. At home though, using headphones may not be the most convenient or comfortable option. [decpower] didn’t have a stereo to connect his iPod to. Since he didn’t want to shell out a bunch of money to buy one, he decided to build his own iPod dock and powered speaker combo.
The case is made out of plywood: many, many layers of plywood. Each layer of plywood was cut out using a laser cutter. Unlike most speaker cabinets that have a distinct boxy enclosure, this unit is mostly solid with cutouts in each layer only where voids were designed to be. [decpower] tried to replicate the Bose Wave Radio internal sound passages. Up top a dock slot complete with a 30-pin connector makes connecting an iPod super simple.
Unfortunately, [decpower] doesn’t say what he’s using for an amplifier or where his speakers came from. He does indicate that there is an internal battery for powering the setup and it appears there is a volume knob out back. Regardless, the final project looks pretty good and [decpower] deserves some kudos for the unique construction method.
Despite what you would gather from looking at a mess of wires, carpet, and MDF in the back of a Honda Civic hatchback, building speaker enclosures is a pretty complex business. To get the right frequency response, you’ll need to take into account the driver’s resonant frequency, the volume of any internal components, and how well the speaker works when it reaches the resonant frequency. Heady stuff, but when [Rich] at NothingLabs started 3D printing his own speaker enclosures, he realized he could calculate an ideal enclosure automatically. Ah, the joys of OpenSCAD.
[Rich] wrote a bit of OpenSCAD and put it up on the Thingiverse Customizer, allowing anyone to manually enter a box volume, height and width ratio, size for a speaker hole, and even bass ports.
There are a few really cool features for this way of constructing speaker enclosures; assembly is a snap, and it’s most likely air tight right out of the printer. [Rich] printed an enclosure for a 3″ driver that has a frequency response down to 66Hz – an extremely impressive piece of work. Video below.
Continue reading “3D Printing of Parameterized Speaker Enclosures”