Desk and monitor distance from wall?

[biggestmuff]

This is kind of a generic and general question, but how far should a desk and monitors be from a wall? I'm almost finished with the purchasing and planning of my studio (18.5' x 11.5'). I bought an Omnirax Force 36 desk today and should be here by the 26th. I'll also be getting a pair of the Mackie 824s, which I've read on here are quite bass heavy depending on where in a room they're located. So, back to topic, are there any general rules of thumb on desk/monitor placement?
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Mods, please close. I opened the same topic over in Studio Building and Display.

https://homerecording.com/bbs/showthread.php?t=156881