In December of 2015 we completed the design of our first integrated security system and bookshelf speaker. The unit is roughly 200mm square with a main processing board hung on the back and a camera sensor board mounted in the front. The case houses a pair of two inch full-range speakers and a four inch down firing woofer. It has about a four liter volume and a five inch port with a one inch opening. Theoretically, the case should have good response down to around sixty hertz.
The main board has a camera processor on it. It also has two forty watt digital signal processing enabled amplifiers on it. It is capable of being driven from an external power supply, a USB connection or an internal battery. It has integrated wifi and ethernet. It also has a 433MHz transceiver, microphone, light sensor, and other various sensors that provide a range of environmental measurements for the system.
Three dimensional CAD drawings were done of the case and prepared for submission to a CNC milling factory for construction. Also, layout files, bill of materials and assembly instructions were created in preparation for having the boards constructed.
Below are a few pictures of the first DigiSpeaker prototype.