I've got a nice Yorkville NX550P PA system that I love. My basses always sounded good through it, but it never had much "slam" -- probably due to the 12" drivers and low freq rolloff. Has anyone tried pairing something like this with a powered sub (e.g. the Yorkville NX200P?) Seems this would be the ultimate "clean" rig. You could drive it direct with an active bass, or thru, say, a Radial JDI, or a Sansamp BDDI for a rock gig. I did some searching, but couldn't find much, other than people saying the powered cab alone probably wouldn't cut the mustard (which I've found to be the case on all but the smallest gigs). Thoughts?