Do you upgrade your brakes after you add 300lbs of stereo equipment to your car?
Didn't think so.......
Do you upgrade your brakes after you add 300lbs of people to your car? lolz
And, double the size of the rotating assembly your stock brakes are asked to stop in a reasonable distance, and of course the physics of the situation speaks for itself. Think of a bolt resisting a little .25 inch ratchet vs. a .5 inch ratchet with a cheater bar. The physics of that are a bit different than that of adding mass to a car which has a given of proper wheel/tire size vs. brakes ratio.
FWIW, my system only weighs around 150 lbs. I weigh 235.