Okay - I have been one of the few "Carvinites" on these boards that has been satisfied with the stock Carvin electronics in my LB75 (J 99's, stock three band preamp). I've stated in other posts that the only reason I would have for change would be for the sake of curiosity. This week I was able to get a good deal on a set of Nordstrand NJ5's (thanks again to Biker4him - great guy to do business with) and get them installed into the bass. I have only run them a few hours though my Tascam BT practice unit. My initial impressions are that they are much more organic, while still maintaining focus. I have two gigs this coming weekend where I'll run them through my rig with the full band for four sets a night. So far my impressions are positive; can't wait to hear them in a real setting!