It depend what kind of kicker if they are solobarics then you are gonna need a pretty serious ampfor thoe because they have a rms wattage of 800 to 1000 watts a piece. o with solobarics i would recomend getting a serious amp and the only two amps that can truely push those subs are treo and zapco. Zapco is a little more pricey than treo and they do the same so i would go with the treo true 1400 watt rms ssx. That way you can wire your subs down to a true 1 ohm load and the amp can handle it these two amps are the only two that have a true 1 ohm load option. So with that one ohm load you will have clearer harder hitting bass that wont wear your subs out.
Now if you have the cvrs or the next level up then i would got with the tero 800 watt rms ssx because you still have alot of wattage coming out of those 15 inch subs o the only way you can put them to their full potential is put them with a top of the line amp that will never break or damage your subwoofers. Of coure you could get a rockford or alpine amp but they will not give you what you want out of your subs and mot likely will burn out on you. There i a 800 watt ssx treo amp on ebay right now for sale for 70 buck you hould check it out
