@audiokinesis Let's remember also that the Heresy is a sealed design and has no ports to help out with bass extension.
I'm not sure if mr. horn is just trolling, but many people prefer monitors much smaller than the Heresy with the same or less bass extension and mate them with a subwoofer(s). Red herring indeed. There are many ways to skin a cat.
If you have the space for a set of Cornwalls or Klipschorns, great. If you prefer their sound, great.
For those that would like something smaller or maybe need to put it in a corner or are going to sit close to the speakers, the Heresy is a nice option. I have mine in a small office mated to a tube integrated and they sound fantastic. I have room for a small sub next to them, and have all the bass I want and/or need.
I set them up in my main system for a few days and while they sounded good there, they don't have the grunt to fill up that much larger room like my KLF-30's or Legacy Audio Focus 20/20's do, but that's not why I bought the Heresy.
I replaced every driver and the crossovers in my Heresy speakers, not because they sounded bad or even that I thought I had to, mostly just because my Heresy I are about 30 years old and it seemed like a good idea and was relatively inexpensive to do. I actually thought they sounded worse (more detailed) after I did it, but they have settled down and sound great with tube amplification.
Cornwalls would be ridiculous in my office space.