i have a schematic that uses a IRF520(or 530 or 540) MOSFET to drive a 4...16R speaker. the circuit is powered from 12V so the max. current wil be 3A. the thing is that the IRF520 is designed for 9.2A and i dont need that much current, and it is quite expensive as well. and i was looking for a replacement wich will hold less current, since i am going to use a 8R speaker, 2A is enough. so i need a FET with about the same electrical characteristics and to be easily available and cheap, @2-3A. can anybody help me?