Peavey Mark IV Bass head. Solid state. Way more preamp gain than you'd expect.
Hi/Lo gain inputs, two channels, each with its own effects loop. Three band EQ on each channel with the second channel having a selectable mid frequency. Either channel can be sent to the graphic EQ.
This guy's got a ton of routing options for a bi-amp set up. Works just as well for guitar as it does for bass.