The Richter Lucky 13 has it all: the standard range you're used to plus that Big Bottom, right there in your hands! Once you get used to a 4-octave Bass Blues Harmonica it is very hard to go back to the restricted range of a 10-hole harp ever again. It's two harps for the price of one: normal and low range, without having to buy/store both or switch harps in a tune. If you want to try some different tunings, there are lots to choose from: PowerBender, Solo, Paddyu-Richter, PowerBender, Diminished and PowerChromatic. Check them out via the links on the Lucky 13 Home page.