They are not quite as big, but they are larger than my 19 cu/ft cabinets that I currently have in use.......the new cabinets pictured measure in at roughly 28 cu/ft per cabinet driven with two 15" transducers. Which is enough to cause, and for one to find structral problems with your home builder. Problems kinda like this:
But this problem was caused by these driven with a single 24" transducer: