This was a budget build so dont hate on it just looking for some opinions

Right now this is my setup:

Alpine CDE-121 deck

JL Audio TR525-CXi back speakers

Kicker KS525 front speakers


Sound Ordnance M-2250 amp

Sound Ordnance™ B-24 subs

At the time I couldnt afford a amp for my speakers so right now its bein powered by the deck. How much of a better sound will I get if I buy an amp to wire the front and back speakers? Will I need to get a capacitor or extra batteries?
Iso some help thanks guys, also leave some constructive criticism if you want

 

No cap or extra battery, amping the front and rear speakers would certainly aid in the sound of those speakers, how much better would be dependent on the installation on the speakers.