i was just curious as to how much the m60's woofers can expand and contract (in cm). For me, the most exciting part about listening to music(other then the music itself) is feeling the bass and seeing the woofers move in and out. i have noticed they dont move at all unless the m60 is loud. they seem very stiff, but when they start to move they really crank it out.

Once You Pop You Can't Stop