For more sound examples and specs on the Thumb NT watch the detailed demo with Andy Irvine here: https://www.youtube.com/watch?v=uXDOmgmeAcQ
For detailed specs to this specific instrument visit:
https://warwick.de/en/Warwick---Products--Instruments--Customshop---Masterbuilt--Basic-Bass-Models--Thumb--Thumb-NT--Thumb-NT-4-String--Thumb-NT---19-4023--4-string--Pictures.html
Music by Leonid Maksimov
https://www.framus.de
https://www.warwick.de