A fabulous 120 bass double cassotto classical free bass instrument with extended keyboard to 45 keys (Also available in a 47 key compact version). 4 sets of right-hand reeds and 6 in the left-hand. 120 left-hand buttons of which 58 buttons convert to free bass across 3 sets of reeds. 5 chin couplers. Perfect for more advanced students attending conservatoire and for professionals who want an extended keyboard and everything a 4-treble-voiced piano instrument can offer. Hand made reeds. The arrangement of the left-hand reeds are optional. The customer may decide whether they wish it to be equipped with 8’+8’+2′ or with 8’+4’+2′ reeds footages.