Those amps put out the same power 1-4 ohms so thats a nice thing to have. They also put out rated power. You may want to look into a rd 800.1 though for that money if you have the right voice coil configuration to use it I think it was selling for 189 shipped and it puts out 800 rms at 1 ohm. Two dual 4 ohm voice coils per sub would be right for that ohm load. Either of those amps are good though.