Griffin Twenty Airplay Amplifier

Griffin’s Twenty product is a digital audio amplifier that uses Apple’s Airplay wireless audio/video protocol to connect your AirPort Express and your speakers. First you attach your digital device (whether a Airport Express wireless base station or any digital audio device) to Twenty using the supplied TOSLINK optical audio cable.  Next you connect your speakers to Twenty’s lugs.  Now, you’re ready to see the magic of Twenty.  With the zero-configuration audio set-up, you are able to stream by means of Apple’s AirPlay wireless protocol from your Apple device directly to your speakers via a low-profile digital amplifier.

Product Specifications

•     Power connection and mount for Airport Express
•     2.1 channel sound system
•     Output: 20 watts per channel
•     Optical audio input with included optical cable
•     Supports powered subwoofer with automatic active crossover @ 80Hz
•     Digital audio output to the user’s existing loudspeakers

 Amplifier:

•     Class D Stereo Amplifier: TI PurePath™
•     Input: S/PDIF optical, TOSLINK connector (included)
•     Sensitivity: 0.34 dBFS for 20 watts (volume control set to max)

 Speaker Output:

•     Power: 20 watts per channel into 8 ohms @ 0.08% THD, both channels driven
•     Frequency Response: 20 Hz to 20 kHz, +0, -0.34 dB
•     Signal-to-Noise ratio: 95 dB
•     Crosstalk: -71 dB

 Subwoofer Output:

•     Left + Right sub-bass audio
•     Autoswitching when powered subwoofer is detected
•     Power: Line-level output (2 V rms at 0 dBFS input)
•     High-Pass Filter: 80 Hz 2nd order Linkwitz-Riley applied to L+R channels
•     Low-Pass Filter: 80 Hz 2nd order Linkwitz-Riley applied to subwoofer output

AC Power:

•     100 to 240 VAC @ 50/60 Hz
•     Supplies both amplifier and power connection for original Airport Express

Source http://store.griffintechnology.com/ipad/ipad-mini/twenty-airplay-amplifier