Gear:

Over the years, I have tried a many different instrument/string/pickup/amplifier combinations, and right now, I'm really happy with what I have in my arsenal:

Basses:

• AlterEGO 4-string Figaro Acoustic EUB (Electric Upright Bass) - read a review of the bass
• French, 1880s double bass
• German, 1964 hybrid double bass (carved top, plywood body) - 1991-2007
• Alembic Series II electric bass
• Yamaha BB330F fretless electric bass with Bartolini pickups
• Fender 1970s P-bass (sold in 1989)
  

Amplifiers:

• Gallien Krueger MB110 combo amp (I have owned about 4 of these)
• Gallien Krueger MDL 400RB III head
  

Speakers:

• SWR Workingman's 1x15T cabinet
• Hartke 210 TP cabinet

  As for pickups, I have tried the Fishman (the bridge pickup, not the sound post pickup), the Barcus-Berry, Underwood, and Realist. Currently, I use a Realist on my French double bass and carry an Underwood as spare. The EUB has proprietary piezos under each foot and is blended with a Schertler (as you can see in the review).

Check out Study of Light by the Rick McLaughlin Trio.