The NX5R is a black version of the NS5R with a built-in Yamaha XG synthesizer with 32 notes of polyphony (containing 676 normal voices and 21 drum programs). An XG daughterboard was optional on the NS5R, but is included in the NX5R.
It was followed by the N1R, a full-size rack module with a larger sample ROM.
We do not have a manual for the NX5R, but the NS5R is similar enough that you can get a lot of good information from that manual.
Year Released: 1999
Polyphony: 96 notes
Multitimbral: 48 parts
Preset Patches: 1049
User Patches: 128
Preset Performances: 384
User Performances: 128
Preset Drum Kits: 31
ROM: 12 MB (528 multisamples, 286 drum samples)
Effects: 2 digital multi-effect systems with 47 effects
Screen: 144 x 40 pixel backlit dot matrix LCD
Outputs: 1/4" stereo pair
Power Consumption: 14 watts
Dimensions: 8.58" x 9.5" x 1.77"
This is a tabletop module.
Korg NX5R ($440)