If you want the SRS sound for your iOS device, you buy the iWow 3D Deluxe, a $79.99 hardware dongle that plugs into your device’s 30-pin port, and performs the DSP processing and headphone amplification. (There’s also a $59.99, un-deluxe version that omits the included earbuds and colored faceplates). The free app lets you negotiate the dongle's settings.
