Wadia Introduces Elegant New CD Player

Wadia 831 Features Zero-Feedback Swift Currentô Technology And Other Sonic Enhancements For CDs And High Sample Rate Sources

15-Jan-01

Wadia, a division of Audio Video Research, Inc., introduced the stylish and sophisticated Wadia 831 Compact Disc Player, the second entry in a new line of Wadia CD players, at the 2001 International Consumer Electronics Show.Housed in an elegant, newly designed chassis, the Wadia 831 shares many of the features and performance qualities of the Wadia 861 CD Player at a more accessible price. Superceding the highly-regarded Wadia 830, the 831 is also the second CD player to employ Wadia's patented Swift Currentô IC. Swift Current technology, a powerful proprietary circuit introduced a year ago in the Wadia PowerDAC Digital Amplifier, performs sonically critical current-to-voltage conversion with no negative feedback, resulting in demonstrably superior sound quality designed to bring a new level of musical enjoyment to owners of extensive CD collections.Conventional digital-to-analog converters (DACs) convert current to voltage (I/V) using feedback circuits based on operational amplifiers. Because the signal from the DAC chip consists of a series of step changes, the distortion introduced by this feedback circuit significantly limits sonic performance.Wadia's Swift Current technology performs this I/V conversion with a patented current-conveyor integrated circuit (IC) that eliminates feedback. This bipolar IC consists of an innovative connection of Wilson current mirrors, an emitter degeneration compensation scheme to optimize transient response and stability, and a novel current mirror arrangement to enhance output impedance.In addition, the Wadia 831 features the highly regarded Pioneer stable platter transport, enhanced 24-bit Burr-Brown 1704 DACs and improved passive parts in sonically critical locations.The Wadia 831 will be available in the first quarter of 2001.