DD Verni - Overkill - Peavey Mark 4 (Solid state)
Frank Bello - Anthrax - whatever he used on Got the time - killer!
David “Sticky fingers” Ellefson - Gallien Kreuger
Tool - Justin Chancellor - massive W/D rig feeding 3 signals to PA - mic‘d dry cab, mic’d wet cab for FX and finally a DI signal
Regardless the tone, the bass should always be placed high in the mix like all those bands do. Sounds heavier, supports the guitars better and adds much more dimensionality to the music when the bassist plays interesting and complimentary lines.