EASTTOP Double Bass HarmonicaA Double Bass Harmonica?? I think the 'double' comes from the fact that this instrument covers a full two octaves, but, whatever the reason for the name, it most certainly is a bass! As you play it you can feel the resonance of the deep notes. This IS NOT a standard harmonica. First up, and the most obvious point, is the size it is approx. 24 cm long, and weighs in at around 875g. As an ensemble instrument it is designed to play as a support in a