The Quadra AV Monitors Extension is an extension for use with Macintosh Quadra AV computers. It is mainly a bug fix to support the included graphics card capabilities which prevents the colors on monitors attached to Quadra AVs from being confused and messed up.
If this file is removed, monitor options (such as gamma settings) may not be available, although you can still use the video card with your Mac and you can still switch between different numbers of colors displayed on your monitor.
Sources and References
- What to Look for in the Macintosh Extensions Folder -- accessed April 30, 2006