Picking an amplifier is relevant to both the music choice, and the subs power rating... If you have a subwoofer that is rated @ 100watts RMS, and you hook up a 100watt amplifier to it, perfect, but just saying that 100 watts sounds good is all in relationship to the sub or any speaker for that matter. For example; take an eclipse 18" Titanium Pro and give it the same 100 watts and you're going to get noise that sounds like your grandma just let one slip at the dinner table. The reason for this is because the subwoofer has a 3,000 watt RMS rating. Sure, you can run less than 3000 watts- but you're giving up sound accuracy, how loud it is, and the overall life of both the sub and the amp. By getting a small amplifier, then turning the gains all the way up, boost control up, you are working the amplifier at it's max. The amplifier can produce the power, but what happenms is you get a crap load of distortion- the ends of the sound waves start getting cut off, and instead of a smooth flowing sound you get the middle of the waves but at the end they get cut off and become square waves... this distortion will absolutely kill a sub in no time, i see it all the time. In addition to the speakers getting killed, running the amplifier like that puts a lot of stress on it- and it is much more likely to fail. My suggestion would be to figure out what the RMS rating of the subs are, are the single or dual voice coil?, are they 2 or 4 ohm? these are all things that you have to take into the equation when choosing the right amplifier for your subs... When you find out that information, PM me and i will break it all down for you and get you heading in the right direction! --Chad--