There's a problem with most AirPlay docks; most of them have relatively underwhelming speakers and weak amplifiers. Wouldn't it be nice if you could grab those humongous speakers that you bought back in college and somehow hook them up to an AirPlay-enabled amp? That's the idea behind the Griffin Twenty Audio Amplifier (US$99.99), which uses your existing speakers and an old AirPort Express (not included) to let you stream music to your towers of power.
Design
Since the Twenty uses your AirPort Express to communicate with the rest of your Wi-Fi network, you'd be correct if you assumed that there's a way to plug the APE into the Twenty. Griffin was smart with the design -- you basically just remove the "duck head" power plug from the AirPor
