this is not a case, but a non electronic speaker "amplifier"... Nonlinear Studio's Amplifiear is a clever clip-on device designed to enhance your iPad's sound. Stunning in its simple design and basic, low-tech construction—no batteries or wires, nor electric currents of any kind required—the Amplifiear magnifies volume by reflecting and redirecting sound forward from the iPad's back speaker.
Rocki turns your old sound system into WiFi-enabled speakers
Rocki turns your old sound system into WiFi-enabled speakers. The idea's a pretty straightforward one: a module that plugs into the back of an existing sound system via audio jack or RCA, essentially turning it into a wireless speaker system. The little hexagonal Play device streams music over your home network via 802.11b/g/n, which has some notable fidelity and range advantages over Bluetooth.