May be this is a dumb question. . .not sure.

I just purchased an Eclipse CD8053. Reading the instruction manual, I
found that I can adjust the crossovers with it.

Is there any particular reason to adjust the high and low pass
filtering at the head unit rather than the amplifier or vice versa?
Obviously, it would be more convenient for later adjustments if I used
the head unit, but is there anything else to consider? Or is this just
a matter of trial and error--see which way sounds best?

If it matters, my amps are an Eclipse and an Orion, each of course with
its own set of filtering controls.

Thanks for any insights you may have!