Hi Adam,

I run my older Energy 10" sub with my new EP500 and I feel that it has indeed improved the overall smoothness of the bass response. My 10" in up front with my mains and my EP500 is behind my listening position. If you can hook up both subs, why not ? it was beneficial in my case.

Cheers

Acoustic Zen Adagio, Veritas center, Axiom EP500, QS8s, Anthem AVM20, MC20,Adcom GFA7400