The bass out of my 800v4 is very natural as well. With my 600v2, I had to cross it over at 40Hz because the bass was blurry/ murky. Even at 40Hz the bass wasn't right. With the 800, a higher crossover just results in more of a very good thing. Turning up the gain does the same. I love it!

I am curious how your system is set up. Is all the bass below a set frequency sent to the 500?

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated