Fitting amp to factory head unit

[Arkious]

hello, my wife is wanting more out of her Fiat 500S audio system without loosing all the Bluetooth functionality etc etc. So I upgraded the speakers but any time a little bass kicks in it farts due to not having the power for them.

I know I need an LOC to keep the standard head unit but I haven't a clue what to look for in an amp. So I was hoping you guys could point me in the right direction as to what else I'd need?

Cheers!

 

[Arkious]

Is this what I would be looking for, for a simple plug and play solution?

http://www.phonocar.com/en/amplifiers/d-class/4-channels-amplifier/PH464.html