Among the companies announcing AirPlay-based electronics at CES are Griffin and Acoustic Research. Griffin's contribution is the Twenty, an amp that pairs with an AirPort Express to pump AirPlay audio into a nearby speaker. The amp supports 2.1 channels, producing up to 20W of output per channel. Users can also attach a powered subwoofer; automatic active crossover kicks in at 80Hz. A pricing and a launch date for the Twenty remain unannounced.
