I have an LFM1 EX which is as powerful as I could ever dream of using. I have it paired with an Aperion S-12 which I feel is more musical but doesn't go as low with as much authority. Together they are able to rattle the windows out of my house at half power. I use my system to listen to a lot of Blues/Jazz/Rock and the subs are really well integrated with my mains. I would love to match my subs with the 1.7s for music. At the moment I have 2 spare channels on my 7125 which I could dedicate to the 1.7s but I don't have the room yet.