Yes.
Bob Rissi designed the Fender Solid State amps (whether or not he should be proud of that, i won't go there

)
But he also designed the Excelent RickenBacker Transonic amplifiers, and then his own Risson Amplifiers.
The only relevant Bass player that comes to mind who used RISSON gear was Nikki Sixx for a short time in 1983.... but he ditched them after about two seconds for a wall of AMPEG.
