Ralf Gauck is supported by the following brands:

Franz Bassguitars Sirius Ralf Gauck Signature fretless Bass & fretted Bass: www.franz-bassguitars.com 

Rheingold-Music cables, pickups, preamp, speaker & amp: www.rheingold-music.de

Gallistrings strings: www.gallistrings.com

G7th capos: www.g7th.com