DESC: The YSP-4100 delivers true surround sound from a single speaker by employing dozens of separate audio beam drivers that deliver center channel sound directly, while sounds from other channels are heard reflecting off the walls around the listener. It is ideal for placement beneath the flat screen TV models, provides HD audio decoding and four 1080p-compatible HDMI inputs along with proprietary technologies.The YSP-4100 features 40 beam drivers and two woofers, each with dedicated amplifiers. The YSP-4100 has 1080p-compatible HDMI that enable the connection of multiple HDMI sources and the full enjoyment of 1080p monitors, Blu-ray disc players and HDTV set top boxes. It also features analog to HDMI digital video upconversion that improves video composite and component signals to HD quality.