To enjoy the best performance of your system, it certainly should be "calibrated". Your dealer should have done this with the audio equipment at the time of installation. It's a bit of a misnomer to use the term "calibrating" when referring to the process of balancing the sound levels of the 5.1 surround system. You could do the "balancing" yourself to ensure that all speakers have the same volume levels -- it only takes a Radio Shack SPL meter, which costs about $40. Your Krell HT processor has a built-in "calibration" tone which will move from one speaker to the next, and all you need to do is adjust each of the speakers until they have the same volume level at your listening position.
Calibrating a video monitor, however, is much more involved, and requires special equipment. Most high-end audio/video stores have a technician with special training that can calibrate the brightness level, color balance, etc., of your video monitor, and it often makes a substantial improvement in the picture quality. If you choose to have a professional do the calibration, look for a technician who is certified by "ISF" (an abbreviation for "Imaging Sciences Foundation", as I recall). Many video monitors come from the factory with their color balance, brightness level, and alignment out of adjustment with the NTSC standard, and it's well worth the several hundred dollars to get your monitor adjusted. Given what you've already spent, I strongly urge you to get the best possible performance from your system (which is a DAMN nice system!).
Calibrating a video monitor, however, is much more involved, and requires special equipment. Most high-end audio/video stores have a technician with special training that can calibrate the brightness level, color balance, etc., of your video monitor, and it often makes a substantial improvement in the picture quality. If you choose to have a professional do the calibration, look for a technician who is certified by "ISF" (an abbreviation for "Imaging Sciences Foundation", as I recall). Many video monitors come from the factory with their color balance, brightness level, and alignment out of adjustment with the NTSC standard, and it's well worth the several hundred dollars to get your monitor adjusted. Given what you've already spent, I strongly urge you to get the best possible performance from your system (which is a DAMN nice system!).