Around 1972 or '73 and heard "my sound", a P bass with fresh Rotosound roundwounds through an SVT. I bought an SVT head, a 64 P bass and new Rotosounds.
"My sound" through the years grew off "that sound." Today I use a PF-500 through cabinets I built, and a Line 6 Variax 5 string, always with fresh roundwounds. An Ampeg is as important to "my sound" as anything.
My role, as a bass player, is to compliment the guitar and drums, both sonically and with what I play (and don't play.) I know what sound I need to support the drums, not clash with the kick, and leave the guitar player room for his tonality. I have always liked being above and below the guitar(s). I play with more mids today than I did in the 80's.
What the band needs to sound as good as possible is most important to me, but I also have to be satisfied and inspired by "my sound."
My favorite model in the Line 6 is the Danelectro model, although I use others in an average night. The Dano has liveliness, presence, enough attack and sounds great through my rig.