I am going to put in 2 HDS212's into my 4runner soon and need a solid 1200W amplifier. I have been looking into the Q1-1200.D monoblock that is 1200 and the RF Prim 1,200-Watt Amplifier. If anyone has any used amps that could power 2 600RMS subs, PM me and I can get back to you about details and suggestions are taken. I have around a 600 dollar budget for amp and subs together.