That small of deviation is going to be speaker specific and much smaller than any room effects. To begin with, you would have to work from the measurements of your specific speakers that were packaged with them. Then, you'll need a parametric EQ that can be fine tuned (not sure what you have). In the end, I don't expect you'll notice a difference and any room impact would be much more important to address anyway.
On the OP's question - I do not EQ my Sierras.