10W0s are ok subs. not high output subs, but good for low cost, low power applications. for $500 though, you could spend $240 for a pair of Adire Shiva 12" or Alpine Type R 12", and buy a JBL bp1200.1 for $200 to power them, and have $60 left over to buy a prefab ported box and a 4ga. amp wiring kit.
the adire and alpines sound soooooooooo soooooooo sooooooo much better than the L5's, please dont waste your money on that over priced wanna be L7 sub, you'll be let down i'm sure. i'm always the last person to put down a product or brand, heck, ive even stood up for boss before, whats that tell ya! lol, but when it comes to kickers square woofers...especially the L5's, i have to say, they suck. for many reasons besides thier over priced cost. also, did i mention they're square?