Most of my stereo $$$ is in my car.
Kenwood KDC BT648U head unit, MB Quart QS216 6-1/2" 2-Way Q Series door speakers, 3 JL10W7AE 10" subwoofers in a ported enclosure and a JL HD 1200/1 subwoofer amplifier.
Sadly, one drunken night a "friend" of mine decided that the volume level in the car was not loud enough so he proceeded to crank the volume up to around maximum capacity, the bass hit so violently that the headlights on my car went completely black, I lost a noticeable percentage of engine power, and ultimately 2 of my 3 subs were ripped open in the process.
Should have spent the extra $1.99 for a "Do Not Touch," placard. Dammit.