Okay, I'll be the curmudgeon here. Note that nowhere in Pinnacle's announcement do they quote what kind of SPL levels this little guy can hit. And since they claim an "anti-clipping circuit" and only 200 watts RMS, it would be awfully tough to get over 100dB at most.
It might be possible, if, like some of the other super small subs, the Pinnacle guys have designed a one-note bass box. That is, a sub purposely designed to have a very limited frequency response spectrum. But knowing Pinnacle and having used one of their subs previously (very nice!) I don't think that's the way they'd go.
Maybe Pinnacle will let us have a go at testing the Pinnacle 6? I'm a sucker for small subs. And if you need four of them to get enough SPL, that's okay with me.