I have a nissan altima 2016. 4 door 2.5 L.

If its stock not much amp power can be used or it will not sound great. But if I were to go this route I would used a small or a series of small kenwoods designed for use on individual speakers instead of one amp for all with base blockers were needed. We use to get the kenwoods for boat stereo speakers, they are small like 30 watts but work well for using already good stock speakers.

If its stock not much amp power can be used or it will not sound great. But if I were to go this route I would use a small or a series of small kenwoods designed for use on individual speakers instead of one amp for all with base blockers were needed. We use to get the kenwoods for boat stereo speakers, they are small like 30 watts but work well for using already good stock speakers. One large amp is not the route to go unless you upgrade your entire set up or use a speaker box with your stock speakers un-hooked or buy a stereo that has a booster setting (built in amp), those are small enough to not hurt your stock speakers and sound a little better too.