BTW, i was one of the engineers that designed and developed this sub @ JBL and let me say, the power handling is SEVERELY under-rated. hehehe we stopped trying to break them once we reached 8,500W RMS for 10 hrs...
^sounds like an assclown muppet to me... and on a side note, it's almost amaizing how some people consider themselves to be 'engineers' without a degree or any formal accreditation....
Your probally clipping... Clipping will kill any subwoofer no matter how good it is.. id check that out.. the sound is like a slapping noice or farty noise..
1000 Watts will heat up my Gti 12 pretty good and start to smell a little after 15 minutes of hard playing. ( song Depending)
As far as the main question.. I would run a 1500 Rms amp on it and no more just to be on the safe side.. if it clips or smells just turn the gain down on the amp..