We're much more classic rock than metal, but I use my B string whenever I feel the need to make the lady dancers' "innerds" rumble. 
The P in my avatar photo into this:
The wireless unit is under the shelf and the EQ pedal is in the FX loop of the VT Bass Deluxe, and it only gets used if I need to tweak my tone for a room so I don't have to mess with each of the presets on the VT. The pedals go into this DIY rig:
The P in my avatar photo into this:
The wireless unit is under the shelf and the EQ pedal is in the FX loop of the VT Bass Deluxe, and it only gets used if I need to tweak my tone for a room so I don't have to mess with each of the presets on the VT. The pedals go into this DIY rig: