The PortaSound PS-55 was released at the same time as the PortaSound PS-35 and is the higher-end model of the two.
Year Released: 1983
Keyboard: 49 keys
Preset Patches: 32
ROM: 32 sounds, 16 rhythms
Dimensions: 980 mm x 236 mm x 85 mm
Weight: 5.6 kg without batteries
This keyboard has built-in 5-watt stereo speaker(s).
Batteries: 6 x D