and have found a couple of alpine 90w speakers

next thing i found was this, apparently it was bought for stepdads boat but never got used

so far all ive got plugged into the head unit are the original Philips tower type speakers that came with the car ( still puts out a nice crisp sound tho

i would like to know how i would rig the sub up, i dont mind just using the 50watts from the head unit to the speakers but im sure it wont be enough for the sub so i will most likely need an amp but have no idea with amps, also haven't got much money at the moment so dont want to spend much as im a student
