No, they wouldn't play anything as common as a Marshall, they had Cornford amps.
Basically, they saw that most bassists who play arenas use Ampeg SVT heads with SVT 810 cabs so obviously that's the only acceptable thing for me to use.
They asked which famous bassists use solid state Orange amps (that's what I use) but they'd never heard of Sergio Vega (Deftones), Troy Sanders (Mastadon) or Geddy Lee (you know).