Blown Sub

I just got a system installed in my car, Alpine 9835, 2-10" type S subs and MRP-M350 amp.  It's been good for 2-3 days,  but it sounded like it really rattled the hatchback of my car.  So today I opened the hatch, cranked er up and one of my subs is rattling like crazy.  I haven't been pounded them, because they told me to "break em in"  Could it be cold weather (-20 to -25) or did I blow it.  Dosen't make much sense, because I really haven't played it that loud.  Any thoughts.........

Thanks.

do you install it by ur self. i think the woofer its ok but the connection from amps are wrong. u can get the good sound when u change the wire + terminal to - terminal and the wire - terminal to +terminal . i meant the speaker cone can move with different way. it can kick upward and backward . u can see it if u change the wire connection. the wrong connection can make it sound very worst when u turn to full volume.

It was all professionally installed, so i now i know wats ur problem. it was ur subwoofer problems. maybe ur woofer not enough current from ur amps. may i know wats kind of sub u use? is that the single voice coil(SVC) or dual voice coil(DVC). I have seen once of the DVC subwoofer drive by a low amp. it sound very bad. u can hear the rattle sound very clear like "brrrrrrrrr......brrrrrrrr" when u set the volume to minimum. i think the subwoofer are blown. i suggest u to go back to ur installer. it is not worth to u...yup.

i more thing. the woofer will working properly with the wright enclosure. there are many woofer with different brand sell today. and then the woofer can be separated with 2 kind that is first with free air(use enclosure with the piping 4 air moving) use and second with no air(enclosure that is sealed wholly with no piping) use. when u put the second woofer to the enclosure with the piping, it will sound very worse even u drive it to high volume. im very experience about this. please ask ur installer about this situation. maybe some installer just install the woofer and just earn money from u because it doesnt belong to them. i hope u know, this is wat we call bussiness it all about the money. they hope u can return to they shop to get a better and expensive audio stuff.

that why i try to install my audio by myself. just ask with ur experience friend. i want to upgrade not just can play the sound but u know to figure it and to tune it. all the audio and the amplifier must tune to get the better performance. this is the reality man! even the high performance amps will drive ur sub very bad if the tuning are not wright.

4 me, i just use the low amps, low subwoofer but i tune them to the highend, to the limit so it sound so very powerful. the expensive amp and sub just 4 the brands. maybe the expensive one give u more function to tune it up. but if u cant tune it better, it just useless.