I have one alpine 12" sub that went out after i was playin music pretty loud. there is no damaged to the subwoofer and the amps are fine. whats the problem?

What size box does this sub need in a sealed box & a ported box. If you have room use a ported box that fits your subs. Probox & other brands may have the perfect box for them. I would tune the box to 40hz if you like loud tight bass.

sub spec 250watts per coil you should be just fine I have 2 typr 15s on orion hcca 2500 1 and it kicks a$$ thats 1000 watts over the rated limits of the subs only shut the amp down once these subs can take a lot more power than they say just use your common sence with the volume and gain levels

9check connections inside sub enclosure(assuming they are in one)mine loosen up after running them hard for months on end.they act the same way yours are.

You can, but if you wire them in parallel that is a pretty heavy load on your amplifier. It may even sound better to use one sub until you can get some more power behind them.

Rule of thumb, you can never have enough power! Check out my tips on wattage.

the gmax amps are only 2ohm stable. it is odd that they both blew at the same time but if the impedence is too low to amps will fail.dual 4ohm dvc subs wired in parallel should read around 2ohms. allthought impedence varies with frequency and isnt truly stable.

ground is loose(most likely amp), battery running low, subs might be damaged? feel free to keep me in touch if problem occurs more after checking grounds and power source and subs. Also might need to re-tune your head unit and amp?

Put another known working speaker in there to see if it works. If it does then the issue is with your speaker. If it also does not work your amp is to blame.

Check the 12v wire running from the battery to the amplifier. Also the sony explode is a garbage subwoofer compared to the Alpine.. sony (they say 1200w max but its more like 100w to power the thing) Amp could be going. Is the amplifier hot when running. If there is a burnt smell comming from the amp, its the amplifier

He may be right! You might try finding a new source of contact for your ground cause it may not be sufficent enough to ground to, also make sure that no wires from the back of your radio have any wires sticking out touching other interfering things that could possibly be causing the noise

You had the settings set incorrectly and overdrove it. The voice coil leads are burn't open. If you look at the little flexible braids by the terminals I'll bet they are black/brown and maybe even burn't in half. It's toast.