Hello Gearhed, that’s a low B. The two octave strings give it a lot of punch. I will tidy up my chops over the upcoming weeks and try to post some sound. J9 it plays really well, about as physical as a well set up double bass. The biggest challenge is muting the non playing strings and cleaning up your technique to stop stray notes coming through. It’s definitely a level harder than a 12 string to keep the groove clean. Thanks for the comments, Tom Konig is on Facebook and has a website if you want to say hello - he’s an extraordinary luthier and a very nice guy.