Alpine PDX-F4 4/3/2 Power Density Digital Amplifier
let me start by saying that 100watts is the minimum wattage they will let this amp pass with! each comes with a birth certificate and mine actually is 123RMS @ 4ohms :D    this thing is a power house, every clear, and dependable. i am running these with type r components and coaxials and they are perfect together. i can not turn up my radio past 24(out of 40) with out my ears starting to hurt.    my system consist of the following:  Pioneer AVH-P5200DVD head unit.  Memphis PR.1000.1 running  Alpine SPR-17C 