The Advanced Hammer Action IV-F keyboard has been developed to represent the distinctive touch of a traditional grand piano, with its remarkable springless design providing consistent upward and downward motion for a smooth, more natural, piano-playing experience. Moreover, just as acoustic pianos utilise heavier bass hammers and lighter treble hammers, the AHA IV-F keyboard also employs different hammer weights, appropriately graded for each playing range. Such attention to detail allows greater stability during fortissimo passages, while preserving delicate pianissimo control, to satisfy the demands of even the most discerning pianist.

It has 15 sounds, polyhony is 192 and there is a 3 song recorder for up to 15,000 notes. It has 2  x 13 watt 12cm speakers, damper, sostenuto and soft pedals. It is 136cm wide, 40cm deep and 85 cm high. Weight is 38kg.