Pioneer Electronics showed four new AV receivers priced below $500, all with HDMI 1.3a connectivity, Lip Sync for synchronized audio and video playback, a new full-color GUI, a new cosmetic design, two-zone audio operation with multi-zone playback of digital iPod and iPhone content and features that enhance the sound quality from compressed audio sources. The top three models feature Pioneer's MCACC (Multi-Channel Acoustic Calibration) system to optimize sound quality and Dolby TrueHD and DTS-HD audio decoding.