The Yamaha TRB 6PII was a through neck, 6 string bass guitar. The scale length was 35 inches, with a 40 inch radius ebony fretboard (24 frets). The body was made from light ash, topped with  a choice of maple, ovangkol or bubinga. Bridge was a row of yamaha BPZ-7 units. Pickups were 2-double coils (alnico V magents) and a piezo bridge transducer. Controls were master volume, balancer, piezo volume and 3-Band EQ. Finish was natural wood.