Exactly. Also burning up amps or blowing subs is 90 percent installer error. Ive personally only messed up 1 amp and it was one of the old school black PPI amps. I played a sub for about 2 hours and the voicecoil got so hot that it froze and burnt up a couple resistors in the amp. U can burn up any amp if u are not careful at what u are doing when u are installing it.