Uneven volume on Jazz Bass Pickups

Are you boosting your bass/low EQ a bunch at the amp or the bass? A major EQ boost below 110HZ will boost the first two harmonics of the notes below low-A, while leaving that A and notes above it relatively untouched.

Basically, is it a problem with an entirely flat EQ? Is it a problem in first position only, or all the way up the neck?

 

I would try going "up" to 105 on the E...

a little more tension might "tame it down"

 

No easy fix, sorry. I could raise the E string a bit from the bridge. Or order a pair of pickups with staggered pole pieces. It's actually pretty darn stupid that most pickups aren't built that way.

 

I solved that problem in my J bass by slanting the pickups... pickups closer to the strings on the "G" side; farther away on the "E" side. Not what I'd call an elegant solution, but it works.

 

You might want to check your volume knobs. On a jazz, when both volume knobs are set all the way up, there is a mid-range "scoop". See if it occurs with only the neck or only the bridge pickup turned up (and the other turned all the way down).

The pole pickups too close OR too far can be a problem, too. Too close, and the magnet influences the vibration, deadening it too quickly. Too far, and it won't pick up the tone as well.

If you have a Fender, you can check your set up specs as compared to Fender's recommendations listed on their site (here):

http://fender.com/support/bass_guitar_setup_guide.php

Otherwise, check with the manufacturer of your bass.