quote... Often a dull sound when unplugged is due to a poor quality nut..
really cant see a how a nut can make your tone dull..even if the nut is cut too tight, sorry GW.... there are so many factors that could be at play... some instruments just dont resonate as well as others, depending on the wood used, and the general construction... i agree on the pickups but LF's are expensive... some good ole Fender USA pups are great, or some Wizards.. i have played Squires though that are very resonant and bright..
its mighty hard to tell without playing your bass...in my opinion i wouldnt spend any money until you take it to a tech at a shop who knows basses