Hi, I once read somewhere that 1969 has the best slap bass sound...is that true? How about Pre-CBS jazz basses? Which one is the best sounding Fender Jazz vintage bass? (Sorry My question was kinda dumb, let me re-explain) Did the Jazz Bass "pick-up specs" EVER Change...since 1960? Did the pick-ups become better and better every year? Maybe it was at it's best at 1964 before CBS took over. Maybe Leo Fender discovered something new &...went. "Oh, oops, this sounds way better...but I guess we won't tell them" I understand that After 1965 until 1969, there were many different colors of basses. But did they change anything else? I am into Vintage Fender Jazz basses. I'm trying to figure out if Pre-CBS is better in any way. I would love to get some professional opinions.