its 0 and i thought it was just to small of a fuse came with a 100 amp but put a 150 in it like sugjested and it is working well i have plenty of power going to it reads 13.8 when the bass hits and like 14.2 when it is just playin reg the amp isent even getting warm so i would def recomend this amp to anyone looking for cheap but good rated power even trying to talk the local stereo shop into getting them in his shop insted of some of the cheap stuff they have now for a kids first system i would give it a thumbs up a+++