The EX5 is one of the most powerful synthesizers Yamaha has ever released. In addition to its built-in AWM2 ROM and sampler capability, it also has virtual analog, virtual acoustic, and FDSP (Formulated Digital Signal Processing) synthesis engines.
Any samples loaded will be forgotten when the unit is switched off. An EXFLM2 flash board that adds 16MB of non-volatile sample memory can be installed to make the keyboard remember samples across power cycles. Sector101 makes an aftermarket version.
It has "Sondius-XG" printed on the right side of the control panel. That refers to the virtual acoustic technology that Yamaha developed jointly with Stanford University.
Year Released: 1998
Keyboard: 76 keys with velocity and aftertouch
Polyphony: 128 notes
Multitimbral: 16 parts
Preset Patches: 256
User Patches: 256
User Performances: 128
Sequencer Memory: 30,000 notes
Sequencer Resolution: 480 PPQN
Effects: 108 effects - 79 insertion, 17 chorus, 12 reverb
Arpeggiator: 50 preset patterns, 50 user patterns
Screen: 240 x 64 pixel backlit LCD
Power Consumption: 32 watts
Dimensions: 1268 mm x 407 mm x 129 mm
Weight: 20 kg
Yamaha EX5 ($750)