I know everyone has differing opinions about Carvin but I bought an all original Carvin LB 40 and it has blown me away. Maybe it was lower expectations from what I read about the "electronics" here on this board. The neck feel and weight is beautiful. And the thing thunders - no bass has impressed me more except maybe the first time I played a G&L L 1000.
Carvin's been making great instruments for decades. Everybody has their preferences so it is what it is. My Carvin B40 is my go to bass for gigs now and I own some nice basses. What year is your bass? Do you know?
I would call Carvin and ask. 800.854.2235 They are awesome. I dont own any of their basses but I am on their 3rd amp and always had good service from them. Well, except for one shmuck in their store but the manager saved the day.