Sonos ZonePlayer 90. Total Harmonic Distortion (THD): 0.009 %, Frequency response: 20 - 20000 Hz. Multichannel audio input type: RCA. Multichannel audio output type: RCA. Audio formats supported: MP3, WMA, AAC, WAV, OGG, FLAC, APE, AIFF, Image formats supported: JPG, PNG, GIF, BMP. Data transfer rate: 100 Mbit/s