@poster
kenwood 718 has one of the best bass. i could drive them with a minimum of HPF 60hz Without getting them to distrot.
but it comes with the expense of a very harsh tweeter. even with a high cut of 12k hz, it still sounds very thick.
kenwood is 80rms and u should give atleast half of its power , a typical headunit provides 18-22rms which is very low.
for an amp, if u getting a branded amp , then 60-100rms is good enough. if u getting an unbranded amp, then 100-120rms.
because in unbranded amps, u want to open the gain as less as possible because they start to pick up engine noise.
good luck