the site says 500, CALL Treo, let them tell you 1000...
why compare a 500rms sub in the 1st place with a 1000rms sub? (even tho the 500rms sub will take more power and abuse than that 1000rms sub)
Infact Ive seen TREO TSX play all day with 1000rms, me personally will rate them @ 1500rms... Ive ran them daily with 2500rms on each sub to full excursion playing music.. on burps made the HU skipp...
But, its your choice what you want, make a good decision....
i actually just bought two tsx's today and they are beautiful, they are so heavy, im going to install them as soon as i get my HO alternator installed. what a good day
u should worry about a HO alternator until ur reg. alterantor has problems then u need one... but honestly i say 1000rms and over u need a HO alt..i had 1200 watts runnin into one treo tsx 12" and my lights dimm...so i bought a HO alt