Well...
I know a fair bit about these. You have an FJB-6 there...
They’re lovely for the money.
I had a white one with Duncan 1/4lb pickups in it and it responded well.
These two are prototypes for a “deluxe” version which never made it to the shops. And they’ve been mine since 2010.
I specified them and when we costed it all up they were deemed “too expensive” by the powers that be...
These have Seymour Duncan Classic Stack pickups in, and a volume and tone per pickup.
Ash bodies, maple tops, ebony boards.
there we go.
Machineheads are prone to rattling.
but other than that - a really decent bass.