Ok, I have already looked this up, and have seen it as doable, but no sound clips, and figured, could be a fun project, or puzzle. I have an 87-88 G&L L2000 in clear blue, ash, P size neck with rosewood fretboard. The bass sounds great, awesome even. However I want to move up to a 5 string. I have been unsuccessful in selling on craigs. To me its crazy to sell an American bass for 500 only to buy a Korean 5 string for the same price. So I notice that 5 string jazz basses have nut widths of 1 3/4 - 1 7/8". And that the heel comes in at about 2.9" (74mm) The G&L 4 string is 1 3/4" at the nut and 2.5" at the heel. String spacing on my 4 string jazz bass at the nut is approximately 6/16". If I converted my G&L (craft new nut, and change bridge, keep pickups) The spacing would be very close to that of the 4 string jazz. Ok any thoughts on this? Does the string spacing sound correct? Am I out of my ever loving mind? Thanks guys!
Look, it's your bass but I wouldn't mess with an 80s g&l. Just start saving for a 5 string. In the meantime you could install a dtuner.
Resale value aside, it's totally doable, provided you don't mind tight string spacing. TB'er Ric5 has done this to countless Rickenbackers as well as countless Fenders.
One thing that I've noticed on a lot of the 4-2-5 conversions is the B & G strings tend to be pretty close to the edge of the fretboard. This may not make a difference to a lot of people, but there are players who can be pretty heavy-handed, making it easy to unintentionally push the string off the edge of the neck. It might end up requiring some finesse playing, it might not. I all depends on the player and the end result once it's done.
Keep the G&L as is and buy a 5 string. I think you will just end up with a hybrid that doesnt do anything as well as two separate instruments. You would need a new bridge, pickups, nut, not cheap.
I would try to find a 5 string bridge that mounts using the same holes as the existing bridge. Don't know if that's possible, but that way if it doesn't turn out like you want, or you ever need to sell you can just put back original bridge and nut and no harm done.
An excellent suggestion, and one I have experience with. I've done this with the Schaller 2000, the Hipshot A, and the Fender Mexi fiver (the one with three holes in back and two in front).
This is true to an extent, but then there would be the extra hole in the headstock for the fifth tuner.