is there such a thing as but too much?

[kelticwizard]

You are right.

Checking out the page where they describe the driver, Driver

The driver features a 3.2 inch peak to peak travel....

I don't know if that is linear or mechanical excursion.

So it should yield, by Small's chart, about 6 dB less-114 dB @ 17 Hz. Which is still very good, but not quite what the advertising would lead you to believe.

[TheBaronGroog]

They probably measured the in room response, with the sub corner loaded-an anechonic chamber may give a truer representation when comparing sub to sub-but who listens in one...

Nive looking piece of kit, but yes a TC sounds driver so you could build one yourself for less.

For real heavy weight systems Genesis Advanced Technologies High End Loudspeakers have the biggest I've seen-the sub tower housed 8x 12" and a full grown man could hang off the top-5.1 system weight was around 2.5tonnes IIRC