What would be a good amp to run my 4 Polk Audio 6 1/2" speakers. Sensitivity 92 db at 1 watt, Frequency response 50-22k Hz, RMS 6-55 watts, Peak Power 165 watts, Impedance 4 olms. No Sub will be added. I will be using my stock radio.
Will running a amp. and new 6 1/2 in" speakers along with the stock radio give me superior sound over the stock sterio setup on my 2009 Colorado or do I need to replace the head unit also.