John Packer JP351SW HW Bb Trumpet

John PackerSKU: JP351SW-Lacquered



Suitable for

The JP351SW HW is ideal for experienced players seeking a heavyweight trumpet that excels in big band and session work. This trumpet’s heavyweight design allows it to play with a centred and powerful sound. 

Unique benefits

Designed in collaboration with Smith-Watkins, the JP351SW HW features:


  • Exclusive Smith-Watkins design leadpipe which provides a powerful sound
  • Special heavyweight bell for a warmer sound
  • Heavy top and bottom valve caps
  • Monel valves ensure a quick and smooth action
  • Satisfying combination of balance and sound, ideal for those big band moments.



  • Model: JP351SW HW, JP351SWS HW
  • ​Key: Bb
  • Bell Size: 123mm (4.84")
  • Bore: Medium-Large 11.65mm (0.459")
  • Waterkeys: 2 (Lever)
  • Body: High Grade 80:20 Brass
  • Finish: Lacquer (JP351SW HW), Silverplate (JP351SWS HW)
  • Lyre Box: No

The JP351SWHW is supplied with a JP851 Pro Double Trumpet caseJP 5C mouthpiece, Ultra Pure valve oil and maintenance guide. 

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