I mounted my amp directly to the side of myt sub box. My amp(profile 400sx) is good in the way that it shuts off when it gets to warm and cools to self down before turning it's self back on again. But when when my car sits out in the sun all day day the amp gets nice and toasty and that it puts out a lot of power(300 watts rms 600 peak) it shuts off after 5 mins of use so i am in the process of wiring a fan to help cool it off.