Got you. If it is that one, then I wouldn’t run powered subwoofers beyond 120hz. Past that it gets directional, plus subwoofers can have distortion issues playing that high, even if it looks like they can via the frequency response.
Those W6’s have really good excursion and power handling capabilities, especially if crossing over at 120hz. What are your SPL requirements? Why do you think the W6 won’t get you there. Or maybe stated differently how are you going to be using these?
If those don’t fit your SPL needs, I would look at PA drivers instead.