i have infinity kappa 693.5i in back of my 92 acura legend and alpine type s 6.5 in front i have two infinity kappa perfect12.1 subs in a sealed box and a kicker kx 600.1 amp for the subs i just wanted to know if i could get a better amp for the subs and what type of amp do i need for my in door speakers.
That's a pretty good sub amp you've got already. You could go with the Kicker KX600.4 amp to match it, which puts out 75w x 4 @ 4 ohms, and would work well to give lots of clean power to the front type S and rear kappa components.