OK, here's a random weird Italian power band with a bassist playing a 6-string Essence or Orion or something (check 1:06):
 

 
Go Marco Banfi!

not an Alembic, It's a Yamaha TRB 6
 
http://images.google.ch/images?q=yamaha%20trb%206&oe=utf-8&rls=org.mozilla:fr:official&client=firefox-a&um=1&ie=UTF-8&sa=N&hl=fr&tab=wi
 

ah
 
never mind