Has anyone noticed a loss of volume on their EUB when going up the fingerboard? In the bottom end the sound is great--full and rich. When going up the FB (from the D on the G string) the volume gets thin. Anyone experienced this? Strings maybe? Pickup maybe? If you have changed the stock pickup to a better one what pickup is your choice?--and strings? The bass in question is the Eminence. Interesting to hear your 'trials & errors' on the subject.