yes that is true, most subs can put out from 50 - 2000+ watts, you will need another amp for it to work. it depends what type of music you like or what, if you go for sound quality and want a greta system, do not get sony speakers or subs or amps, they suck. If you want truely good sound get jl audio, focal, or boston acoustics. But you will usually need a amp also for you new speakers, hope this helps, if not, keep posting =D