I have just purchased and set up Axiom's Audiobyte computer speakers with the Audiobyte EPZero Passive Subwoofer for our personal computer at home. I would say that the EPZero subwoofer is "fair," but I'm searching for a sub that goes a bit deeper. I'm considering av123's "x-sub."

Can anyone suggest any alternative subwoofers that might be appropriate? [My wife listens to pop music and I listen to classical music]

Thank you.