Move beyond standard home audio entertainment with Sony's STR-DA7100ES multi-channel audio-video receiver. Featuring High Definition Multimedia Interface technology, the STR-DA7100ES was designed to complete a high-definition home theatre package by raising the performance of a 7.1 multi-channel surround sound system. For more than 20 years, Sony's ES series - for Elevated Standard components - has been reserved for products that deliver the highest audio-video technology. Priced at about $17,800, the unit has a 32-bit S-Master Pro digital amplifier that delivers a root mean square power rating of 170 watts to seven channels, enhancing sound resolution, balance and accuracy. Connectivity options include dual i.Link IEEE 1394-standard inputs, an eight-channel analogue audio input and five optical digital inputs.