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Hi, I have a American JB4, i'd like to turn it into an active bass. Do you have any preamp suggestions? Anyone here modified is JB4?
Thanks for your help!
That sweet SB body shape really stands out, eh? It'll be really interesting to see how you find it compares with your various P-basses.
If the control plate on the JB-4 is the same size as on Fender J-bass, the an Audere or John East preamp would be a drop-in and easy mod.
Ok... so
Welp- sadly- not 'fitting' my hands (neck profile a bit too thick) & not excited with the tone... gonna return. My black & white P-basses have J necks (Geddy Lee & Amer. Spec., respectively, which are 'thin' & 'slim'). Really wanted to like this bass...
John East pre for me. I love mine.I'm not a fan of audere preamps but thinking about the east preamp but never tried one. I only have experience with aguilar's obp preamps.
John East pre for me. I love mine.
Which preamp model do you have?
I'm not a fan of audere preamps but thinking about the east preamp but never tried one. I only have experience with aguilar's obp preamps.
I have the DJ retro pre.Which preamp model do you have?
Well that's too bad! In your photo it looked like the SB had the typical 1.5" J-width nut, so I guess it's the through-neck profile that's not working for you. I also like a J-neck on a P-bass and find my SB very nice under the hand. On another front, you may find (like I did, and others have) that rolling the volume back by 20-30% reduces the signature MFD pickup sound in favour of a more classic P-tone. Then feathering in that bridge pickup is magic.

I'm not a fan of audere preamps but thinking about the east preamp but never tried one. I only have experience with aguilar's obp preamps.
I'm not a fan of audere preamps but thinking about the east preamp but never tried one. I only have experience with aguilar's obp preamps.
Personally I don't like the unfinished look of the J-plate without the pickguard. Cream (white?) looks nice; black's too dark for that pretty burst.![]()
....aaaaaand here come the tort suggestions.