Hi Carlo
That’s a unique Abacus you have, it is the first Duo deluxe version I have seen that has a 25 Note Pedal board, (Normally reserved for the Pro version) it normally comes with a 17 Note Pedal board, plus additional speakers and 2 X 80w amplification to supplement the 2 X 30w, 4 speaker system in the abacus itself. (Does the 25 Note Pedal board replace the speakers and amplification)
Have a good Christmas, and Happy Playing

Bill