I just tested this speaker, installed over 3 months ago for a Bill Fitzmaurice horn subwoofer project (pro audio). For an11 x 12 foot bedroom installed with a plate amp @300 watts max Chinese made from Parts Express. I chose this speaker to stay out of the realm of over expense and giving enough power to not distort the speaker with harmonics by choosing a conservative power plate amp, however if I were to use this sub outdoors (I'll test that out later) but , it's under my bed, so I'll have to jack up my bed again to remove it. The speaker has the right amount of x max, low power consumption, high quality build for its purpose.I didn't take pictures of every step of the progress of construction.