sub bottoming out?

[954runner 10+ year member]

tonight at work one of my friends wanted to hear my set up so i play it for him. i crank it and he is pretty impressed. i get out and roll down the back window and listen to it from the hatch and it sounds like my sub is bottoming out or something.

im almost positive i didnt blow it, considering im only running 600 watts to it, and its rated for 1000.

the amp's "gain" is an input sensitivity that goes up to 4 volts (my headunits pre-amp volts) but i dont have it up that high, so it shouldnt even be clipping.

i immediately turned it down, but even earlier today when i got out and listened to it, same song, same volume, it wasnt making that noise... any thoughts?

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[Eldorado 5,000+ posts]

Its probably bottoming out. It sounds really nasty when it does bottom out, almost like you are hammering on the cone.

Dont play that song.

 

[bri487 5,000+ posts]

voice coils could have been hot, deck could have been clipping, could just be how it sounds in that position in the car.