I run my H&K BassBase 600 head through two Lee Jackson XLB410 cab's and they sure deliver the middle punch and bass that I have been looking for. The Lee Jackson cab's are the best 4x10's I've ever heared, poeple, they are Mr Jackson's perfect Ampeg 8x10's. They pack alot of bottom, and much more than normal 8x10's, I would'nt trade them in for an Ampeg 8x10" no sir! But I am looking for a little more top than theese two bad boys gives me with out having to boosting my treble all the way up. Which dos'nt really leave any room for tweeking in more top (I use alot of different sound's and settings when I play). I've been talking to my local tech guy about having a horn installed (his solution on the matter), I've never really been a big fan of the sound of horns, and now I'm thinking about having one installed into my 2 4x10's. I also have a good friend who's working with TC Electronics and he's suggestion was to build a sepperate horn box, I like that Idea better, since we don't have to "break" into the enclosed cab's, but only pull a couple of wires and attach the bad boy. Also this option gives alot more possibilities for trying out different horns. Anyone has an opinion on this matter, anything?!