The Yamaha TRB JP (John Patititucci Model) was a 6 string electric bass. The bolt on neck had 24 frets and a 40 inch radius ebony fretboard. The scale lenght was 34 inches. The body was made from ash and alder topped with figured maple. The bridge was solid brass, pickups were side by side double coil (with alnico V magnets). Controls were active controls (5 knobs) . Finish options were amber or charcoal grey.