Use Room EQ Wizard, with a Galaxy or RS SPL meter. Use the spectrum function, and don't let THD reach above 10%, equivalent to Xmax, and no harm will ever come to your driver.
If no measurements are to be taken, use the Incredible Hulk Sonic Cannon Scene (attached), it's what I have used.
Move the subsonic filter down a notch and move the volume up a few dB every time you play the scene. When it sounds weird, stop....done...you will know. For all the ******** people say about not hearing distortion at low freq, trust me, you will....it will make you think twice about CEDIA standards.