i have 2 10's that are 4 Ohm mono and 500 rms and I want to know what knid of amp do i need to have?

Answer 1

I'd go with a mono amp with a rms rating between 500-1000 (the closer to 1000 the better). Check Sparky's post for an illustration on how to wire the subs and amp.

Answer 2

You can either get an amp that is 500 watt RMS X 2 @ 4 ohms and wire each sub to each channel.

-or-

Get a 1000 watt RMS X 1 @ 2 ohm amp and wire them like so:

http://i81.photobucket.com/albums/j230/sparky3489/PARALLEL.jpg

Answer 3

you need one that is 2 ohm stable so that you can bridge it mono and run it in paralell to both subs.