well if you want to amp the SPEAKERS it is going to be a LOT harder... but as for a sub, all you would need is an amp with a line level imput, or an adapter... which just takes the signal from the speakers, converts them so the amp can process them. i have an amp that has line level imputs... its a 4 channel amp but can be bridged to a 2 channel... an Alpine MRP-F300... if you want to buy it make me an offer...
[email protected]... its BRAND new... but back to your question. yes your able to