I am a proponent of shielding. Works great, but my latest victim, a Yamaha BB605, while quiet with pups equally blended, was still annoyingly loud when either pup was solo'd even just slightly. Well, I've got a few basses , not the least of which was my lone fretless wonder, a Carvin LB75AF. A beautiful bass and one which will never get carved on. It came with h50n stacked humbucking pickups.Quiet, mwaherful (new word), but relatively low output for an active preamp. I had a set of bartolini pups so I put them in it and while not much of a change in sound, was still quiet and a pleasing tone. I even tried a set of carvins j99 pups in it but didn't like them in that bass. So, now I have the h50n pups with no purpose in life, so I think I'll try'em in the Yammy. Shore 'nuff. Still have the bright and powerful pop that I like about the NE-1 preamp and now the useable option of either pup by itself. Just thought I'd share my experiment.