Hi alain, Specs for the Roland EP-9 here:
http://www.jimlaabspianos.com/digital/roland/ep-9.html Keyboard: 88 keys (weighted, with velocity) Max. Polyphony: 28 Note Polyphonic, Pt Tones: 8 (Piano 1, Piano 2, E. Piano, Vibraphone, Strings, Organ, Choir, Harpsichord) Effects: Chorus (On/Off), Reverb (On/Off) Made Recorder: Mummy Capacity=Approx. 1,600 notes. Number of Songs=4, Controls=Rec, Play, Song, Select, Tempo Speakers: 12 cm (5") x 2 Output: 5 W x 2 Connectors: Output (L/Mono, R), Input (L/Mono, R). Damper Pedal, Soft Pedal. DC In, MIDI (In. Out), Phones x 2 Dimensions (Incl. Stand): 1305(W) x 370(D) x 775(H) min (51"x 14-9/16"x 30-1/2") Weight (Incl. Stand): 20.6 kg (45 lbs. 7 oz.) Accessory: DP-6 Pedal Switch Option: KS-9 Keyboard Stand.
O8