I just received a Thomas & George Martin 5 string Double Bass (I've put Helicore Medium Tension Orchestral Strings on it along with a matching Low B String for easier playability and I've also added a Copperhead Double Bass Pickup and Docking Station so I can run it though my Bass amp) & I'm learning how to play it for the very first time. I know how to hold the Bass seated, how to hold the bow (it's a French Bass bow which is held exactly like a Cello Bow), and I'm learning the 1-2-4 fingering system. I started bowing my first notes on it & I started feeling the Vibrations of that Low B string in my chest which is quite surprising.