Now that right there is funny.The Powerhouse cabs are better than the Subway series.. Larger cabs are generally more efficient than smaller cabs.. They can produce more sound per watt of power consumed by moving more air than the smaller cabs..
I'm pretty sure Agedhorse has done quite a bit more "experimentation" than you have.
Now you may like the Powerhouse cabs more, and that's great, nothing at all wrong with that, but attaching "facts" that are not is another thing....