The new Yamaha 671D features a variety of exciting design changes for the advancing student or professional horn player while retaining Yamaha value, quality, and consistency. Through the Yamaha design philosophy of vertical integration, this professional model offers many of the same high end updates and innovations as the new Custom 871D. The new 671D incorporates modern features into a traditional horn design. A thicker rim wire and a gold-brass leadpipe combine to create a beautiful rich tone.