gr8ful

I have an MKX not an Edge (note signature). I was hoping that the THX system has a powered sub that can be adjusted but I can't find anything in the literature that deals with this. The literature I've read basically says the system is pre-balanced, but some types of music just sound better with a stronger bass response.

I have the THX stereo and I was wondering if there is a way to boost the bass response. I have the on-screen bass controls maxed and I would like to get a bit more thump going (I'm a Bose bass lover).