Versatile, sonically invisible monitor system that enables you to hear and manipulate the finest detail. Features the same high-resolution as the acclaimed GD mic preamps, with balanced and unbalanced analog 5.1 inputs, multiple balanced stereo analog inputs, plus digital 5.1 and stereo inputs. As of 5/27/05, new software updates with a host of new features are available from Grace Design website for the m906. Downloading these requires a special cable which, if you do not have, is available free of charge from Grace Design by contacting their Boulder office. If you do not have internet access, the downloads will be provided to you on CD, also free of charge.