Sure, there are 4 or 5 screws on the door panel, look carefully for them (one in the door handle cup, one in the lower rear corner, one in the area where the handle/lock switch is, etc..). Unscrew them, and start popping the panel out from the bottom working your way up, and it'll just lift up and out.

Be careful, because the snap clips take a good bit of pressure, but don't be too forceful and break them. Not sure about the dimensions of the JL components, but most people have found aftermarket midbass drivers to not fit comfortably in the stock location without hacking up the plastic baffle (you'll know what I'm talking about when you see it), options are cutting them some, removing entirely, or making a small spacer ring out of 1" MDF.
The tweeter pods just pop out too, pull out towards the center of the dash and that's it. Be careful not to lose the clips.
Reassembly is the reverse of removal.