find the OHM rating of your speaker, 2, 4 or 8
find the RMS rating for your speaker
than look on the amp for the RMS at that ohm.
less is fine, more is also fine.
just DONT CLIP THE SIGNAL. use as little bass boost as you can. set your gains properly(google it) and whatever happens, if the speaker distorts turn it down.
if you use bass boost, do it on the amp. not the headunit.