Alfletch

Want to replace rear speakers with 5 1/4 inch 30W rms speakers for my own listening pleasure. Infinity 462.5 cfp in doors and Pioneer P4020 radio at 20W rms. I know I'll have to adjust the opening for the speakers.
Do I need to get a 2 or 4 channel Amp or just operate from the radio?

Vjgtrybno1

I'm not familiar with that head unit but if it has outputs for 4 speakers you should be fine without an amp.

TheArab944

My freind got a cheap 2 channel 600 watt amp for his speakers. Sound quality is incredible! and when u want to go loud u can put it as loud as possible with full clarity.