So today I went into our local Long & McQuade store and blew half an hour trying out basses I'd never played before. I've next to no experience with Yamaha basses but heard lots of good things, so I decided to give a couple a whirl. When I picked up a Yamaha BB424X and plugged it in, the hum with the bridge (single coil) was ridiculous. There was some hum with the split-coil neck pickup and next to none with both. What's with that? I'll note for reference that none of the other basses I tried out today displaying anything like the same RF problem. Gibson, Epiphone, Ibanez, Fender. Big music stores have lots of fluorescents so it's not a bad place to sort out this sort of issue. Was that just a dud Yamaha or does that bass have issues?