As I finished finding an amp that would drive the tweeters(I bought a number back when I was building and designing the system two of which were dead on arrival from the wonderful ebay sellers but I didn't know until months later when I got around to hooking them up.)

What are you using the balance the different lines? I've not found the gain controls on my Rane to be up to the task. As a consequence, both the tweeter and the woofer sub lines are driven by amps with their own gain controls on them. This allows me to make balance adjustments that would be impossible with just the little Rane.

When Klipsh built the Heresy's they put in what is commonly called the California sound, which is heavy on emphasis in the impact bass. The horns tend to a more crisp sound, and the whole package is designed for rock bands. I wonder if its a combination of balance and equalization(caused in the passive cross) that has got you enthused with the sound of the Heresy speakers.

Of course, this doesn't deny my first two points in the first missive response. Altho some would simply blame it on: If you use cheap speakers you'll get cheap sound. I think its more complicated than that.

Marlboro