Pshh... DONT listen to Alegre323, A 2,500 Watt! Are you stupid, dumb or both? A 2,500 Watt amp would run a legends battery dry in a minute.. Lets not mention that you would probably BLOW the Alpine type-r's because the normal input watt's is like 500 Watts, although they do MAX out @ 1500 Watts, its not good to max them out 24/7.... A 2,500 Watt amp is probably like $800, and you would need to have a battery in back, or A LOT of those stupid capacitators.. Go with Rocker fosgate, MTX audio, Audiobahn, Alpine, Clarion.. Alpine Type-R's are really nice speakers, you made a great choice, im replacing my 15's with Alpine Type-R's in the next few months.. You will be satisfied with the speakers.. When your done tell me how everything worked out, and if you like the woofers..