Just got back from GC, well, a few hours ago, and A/B'ed IDENTICAL 2008 Fender American Standard Jazz basses. Identical, that is, except one rosewood and one maple fingerboard.
Played through same rig, GK1001RB-II and GK's 410GLX cab (the cab was not my first, second or even third choice, but pickens were small)
I will never listen to anyone who says that the fingerboard wood makes no difference in the tone ever again!!!
The difference was significant.
I played the same lick, same settings on the basses: both pups and tone up full, and sames settings on the amp: flat, no boost, no contour or presence.
The Maple was brighter, more articulate. The rosewood was warmer, somewhat darker. Hands down I, and everyone listening, preferred sound of the Maple neck. (Including two very good bass players that happened to be shopping at the same time)
Now, I'm not saying the rosewood fingerboard sounded bad. Not in any way, it was a very nice sound if you are looking for that darker warmer bass tone.
However, with just a small roll-off of the tone on the maple, I got a warmer bass sound that still was more articulate than the rosewood.
Soooo... I'm ordering a new white Jazz V with a maple fingerboard. What am I playing now. you ask? A 2 year old American Jazz V with rosewood.