i Havent ever heard of a sub being blown because of it being underpower if anything it is good that the subs have more wattage capibilities then your amp so that way you dont have to worry about blowing one out, also that farting noise is from a mismounting of the sub if you installed ity your self maybe you didnt mount it correctly it could be that you drilled one of the screws in sideways and that lets air excape which is not bad but it doesnt sound good when you open your trunk to hear them. But yeah as for your blown question you want to check the fuse first change them and check the REM its easy to connect but yeah after that then unplug both subs and check each one seprate with only 1 plugged in at a time ( you must take your key out of the ing. everytime you check ewach sub to restart your amp)with your amp on if your amp kicks on with one of the subs then you indeed have a blown subs. Most amps shut off when it detects that theres a problem to prevent further complications , also quick check you want to smell your subs (sounds weird but it works) to see if you smell burnt rubber /plastic or you can push your subs in and out to feel a crunchy stiff feeling to check if your coils in your subs just crapped out. Also wouldnt hurt to take the subs to a friends house for use with there amp.Hopefully this makes sense get back to me if you solve your problem. car audio can be fustrating :crazyr: