In Theory?

Yes they can be all used off of one amp. The sound will be determined by the install and the box for the subs. 50 - 100 watts of power is a ton of power to operate component speakers for most systems. The same amount of power is also fine for a sub and can produce some great output if the box is done properly. As long as the gain setting is not too high and the system is used properly you should not have any worries about damaging the sub. The downfall to using an amp this small on big subs is that they might not deliver the output that you expect. A sub needs power in order to produce respectable output levels, keep this in mind.

If you do not have your subs yet, find a dvc 4 ohm version for them (I assume that you are going to use two subs). This will allow the subs to be wired into a series / parallel circuit and the amp can then be bridged to a 4 ohm mono load. This will double the amps power output going to the subs. This is a great way to use your amp in it's most effecient method and get the best bang for your buck.

look for an amp that can be opperated in tri mode. then you could simply wire your svc subs in parallel and reduce them to a two ohm load. My four channel kicker (kx800.4)can do this and will send 100 to each front channel at f ohms and 400 to the subs, bridged to two ohms, you may not want that setup, but it is an additional option