Need amp for speakers?

[kuijo 10+ year member]

Right now i'm pushing 200w x 2 to 2 10" MTX and i've got 2 pioneer and 2 Inifnity speakers running of the HU that balance it out pretty well(Check my sig). But when i upgrade the subs to 400w at 2 ohms x 2 am i going to need an amp for the speakers? Or will the speakers still be able to get loud enough for the balance. I don't want my bass drowning out the music.

edit: My HU puts out 50x4 peak. So i don't know how much speakers are getting. ( THe infinity's RMS is 100w i believe"

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[jacko 10+ year member]

i noticed you are replacing the rear speakers. Amp your front speakers first. Before anything. Even better subs. Those kappas will love it.