The Tropo subwoofers are rated at 600 watts RMS each, which is 1200 watts RMS for the pair. All CT Sounds products are underrated, our subwoofers and speakers can handle more power than what we rate them at and our amplifiers put out more power than what we say.
With that being said, as long as you tune your amplifier correctly you should be fine, it might be a good idea to back the gain down slightly just to be safe. We recommend tuning your amplifier with an SMD DD-1 or O-scope to ensure you are not clipping. Make sure to set your subsonic filter on your amplifier at roughly 2-4 hertz below your box tuning.
The two main reasons subwoofers break is because of square sound waves being produced by your amplifier and sent to the subwoofer which is also known as clipping. The second reason is playing below your subwoofer box tuning.
One last thing to note is that the more power you are sending to your subwoofers the smaller the subwoofer box should be. This will act as an additional suspension for your subwoofers. Our recommend box size is for running the subwoofers at their RMS power.