Loved JJB's sound - usually Hiwatt amps, I believe. At the time it inspired me to get a similar noise from my P Bass and a Fender Bassman 10 with master volume - although rather quieter, sadly...
In the late 70's/early 80's I was lucky enough to record quite a lot at funky old TW Studios in Fulham, London where the Stranglers recorded their first 2 or 3 albums. Shame, for me at least, that they ended up doing "Golden Brown" and the like.
Hard to convey now the impact that Jaco, JJB, Stanley Clarke and a few others made back then.