Smart shopping would tell you to get an amp from parts express (for example) and put the savings into the sub and its enclosure (or just save it). That would be a much better investment as the difference between amplifiers is much smaller than that of speakers.

Sorry I misunderstood your equipment. It sounded like you already had something. I only hear of this if someone already has their equipment and wants to get double use out of it. No need to get snippy.