I recently added 2 JL Audio E112 subs. They were very easy to integrate and it is amazing the difference they made to the treble, mids and sound field. Also, you should really consider power, speaker, and interconnect cables as equal to a component expense. If what you are using isn't up to your system you should start there. Also power conditioning made a big difference for me.
So I am using Pangea power cables for all my components and subs (See Audio Advisors. com). Audioquest Wind interconnects and Comet speaker cables. And a Furman Elite 20 pf power conditioner (which can add a 45amp boost when needed). My system: McIntosh C49, MC352 with XR100 speakers.
So I am using Pangea power cables for all my components and subs (See Audio Advisors. com). Audioquest Wind interconnects and Comet speaker cables. And a Furman Elite 20 pf power conditioner (which can add a 45amp boost when needed). My system: McIntosh C49, MC352 with XR100 speakers.