I finally received my S2 this week and finally was able to give it a good work out. I already had a Captivator w/4000W amp so I was very interested how the sealed S2 would compare. Before I give a comparision, I must state that my listening room is only 13x17, but opens up to three other rooms and that the single Cap was more than enough. In fact, I liked it better than the pair of HP Submersives I had in the past. In my opinion, I prefer the extra output the Cap offered. I will admit that the HP's blended better during music playback.
I wanted to try something new so I ordered the S2 up from Jeff to see how it would compare. In my opinion, it is the best of both worlds, it has both the rediculous output of the ported Cap and the extension of the sealed HP's. I will also state that I will never test the limits of the S2. I had a hard time calibrating it. I had to turn the gain down to one click above the last setting and still had to turn my processor down to -8.0 to be able to reach 75 db's.
When I ran it hot to +10, my poor house's walls were flexing and the doors rattling. I had to turn it down, it felt like my head was going to pop. I will now decide which one I am going to keep and which one to sell. When I started this comparision it was always my intention to sell one of he subs, now I just need to decide which one to keep, as it is not a need, but just a pure guilty pleasure.