Does anyone know the real specs of Single 12'' Solo x Sub ?

i was thinkin of buying a single solo x 12' and a zx2500.1 for it..do you think they would work fine ?? cuz on kickers website they r saying a single solo x 12' has rms of 1500 or max rec rms from amps is 1500 but on other sites it says solo x rms is 2500..which one is true ?? how can there be 2 diff specs of same product ??? i have seen vids of ppl playing them with zx2500.1 they sound pretty impressive..can anyone tell me the actual rms of it and which amp should i run it with zx2500 or zx1500 ?? im goin with a sealed box and im not really goin for that much loudness i want a clean clear high quality sound..suggestions plzz