I have a second system in my workout room and that's where my Heresy III are. I finally got around to playing with biamping, here's the set up and result, it's lethal. Kid you have to biamp your Heresys, you have enough amps to do it and I am amazed at the improvement. My advice for any other Klipsch owner as well, at least try it.

I am using the Emotiva USP-1 & ERC-1, from the sub out I have an Emo Ultra 12 crossed at about 60 Hz, from the full range outputs I have a Bryston 3b-st to the Heresy 12's and from the high pass outputs I have a Parasound hca-750 to the mid & high horns. The 750's gain is backed off a bit from full so the horns are better balanced with the 12" driver. This set up is a monster with serious, dangerous, SPL that hits hard and remains clear.

I don't know if every speaker made to biamp can be improved on by doing so but my Heresy's sure did. It really helped to get better balance between the horns and woofer but I also seem to have some overall improvement in clarity. The USP-1 is ideal for this with all the preamp outputs, it has to be an improvement over using "Y" adaptors, each amp gets full signal strength with no splitting.