TRB- 5P Groove 1.mp3 TRB-5P Groove 2.mp3   Up for sale is this fantastic example of the early made in Japan Yamaha TRB-5P with original hard case. The instrument sounds superb, plays wonderfully and is in excellent condition for its age. SPECS Figured Maple Body with Thru-neck Construction, the piezo pickups used on the TRB models use individual bi-morphous piezo elements for each string, all built into a specially designed bridge which is machined from solid brass.