Stock speakers

Just got a 2009 Tacoma double cab pre runner. Love the truck but the stock speakers are weak! They just dont get loud enough! My question is, if I install new component speakers in the doors, do I have to use an amp or will the stock head unit be enough to run them? And also can I install an amp and sub using my stock head unit?

 

its not the speakers that are weak its the head unit thats weak, i got a new head unit and now i cant turn up the volume all the way because it is way too loud

 

id recommend a HU also as it can create much more power and many more sound adjustments along with the easy ability to upgrade

 

I started with a new head unit and sub 1st my stock speekers sound alot louder now. I do plan on replacing them though. U can run a sub with the stock head unit. I belive it's beter to have a amp for upgraded speekers.

Edit u need some kind of converter to run the sub with the stock head unit

 

I thought I had read that the HU in these were fine.. and the stock speakers were crap... now I am hearing the opposite. Grrr

 

I replaced just the speakers to begin with and still had the same problem of not enough volume. Most of the problem is definitely the HU, though the speakers aren't great either. I used a line out converter to run an amp with my stock HU and now the volume problem is solved.