Hi All, I am new to this site but not new to JBLs. Currently I have Jensen Imperial bass cabs with JBL 136A drivers and 350hz Edgarhorns and JBL 2441 drivers with Radian diaphragms for the mids. Then I have the big Heil tweeters on top of that. I cross at 400hz and 7000hz. I am driving all this with a 6LU8 sweep tube amp for the tweets, 26/300B for the mids, and PP 807 amp for the woofs. Just yesterday a guy called and offered too much money for my Jensen cabs and on the same day I found a pair of JBL 4530 cabs on CL......so I am switching to the 4530. But, there are no drivers in the 4530s. So, what driver should I use? Here are pics of the scoops. Cheers and thanks for your input.