well you should really match the wattage of the amps to the subs some what close(Both RMS and Peak). If you go too high with the amp it could blow the sub, especially if your sub enclosure isn't built to the proper size. If you go too low you could burn up the amp. You must consider the impedance of the subs and amps. Most subs are single voice coil (SVC) or dual voice coil (DVC). You want to mach the impedance's well. Amps will not produce 1000watts @ 4 Ohms and do the same @ 2 Ohms. So for example. If you have a DVC sub that can handle 500watts RMS and 1000watts Peak and it has 4 Ohm voice coils then you want an amp that can match the wattage @ either 2 Ohms or 8 Ohms. impedance's. If the amp produces that at 2 Ohms then the voice coils need to be wired in parallel meaning that the output of the amp connects to both voice coils (+ from amp goes to both + on sub and same with the negatives). Now if the amp produces that wattage at 8 Ohms then the coils need to be wired in series meaning that the + of one coil connects directly to the - of the other coil and the connection from the amp connects to the remaining two connectors for the coils. Remember, wiring coils in parallel cut the impedance in half and wiring in series doubles the impedance. This also applies to connecting two subs to one channel on an amp. Also generally, the higher the impedance the better the sound quality. Remember that amps are most stable at a specific impedance so be sure to check that.