IMO, look to the following first:
- EQ (try boosting mids, and/or cutting bass, possibly treble)
- Strings (some strings are growlier than others)
- Technique (play near the bridge!)
- Onboard preamp controls (i.e., pickup selectors, pickup volumes, etc. - try making the bridge pickup louder than the neck pickup)
Nevermind the pedal approach for now! IMO, trying to "fix" this particular problem with an effects pedal will likely be a waste of your time and money.
BTW, telling us what gear you're using (bass, amp, strings, etc.) would really help us out in helping you... your profile's blank.
