A:AnswerYou could. If you have an aftermarket radio and an amp you definitely can. It's just a lil harder wiring a stock radio an you don't get as much to your door speakers. It's sorta hard to explain but yes you can.
A:AnswerYou must match the ohms first. I think these kenwoods are 4 ohm. Check your amp. If it can be wired for 4 then I would try it. Just be careful not to clip (distortion) or underpowered speakers can blow too.
A:AnswerNot sure about top 5 but I have always had the best experience with JL Audio. So much so that I have 3. You only need 1 though to get good bass.
A:AnswerTechnically an amp is not required however you will not leverage the speaker mid and low end potential. Best thing to do is use the subwoffer out of the head unit to an amp as a mid to low frequency channel.
A:AnswerIt's personal preference I would suggest a sealed box for a wider range of music or a prefab ported for like rap music they were super loud in my box but they don't play well with super notes
A:AnswerPolk is way Better Polk and infinity are gonna be the best sound quality u can get for the price if u want to spend some money jl audio all the way my 1 w7 12 puts 2 of these kenwoods to shame in both volume and sound quality