For sound examples and specs watch he Warwick Corvette $$ 5-String - with Andy Irvine:
https://www.youtube.com/watch?v=2QbGoM3jghM
Music: A Gentle Goodbye by Jörg Varga
For more information on the instrument go to:
https://goo.gl/vi5BkM
http://www.warwick.de
http://www.framus.de