Denis Wick Heavytop models use a completely different principle in not feeding back to the player the vibration of the instruments, transmitting all the energy through the bell. This gives a much more powerful sound when needed, more security in the high register and more control and focus in all registers. Design based on the mouthpiece used on the F trumpet by John Solomon, principal trumpet of the London Symphony Orchestra 1904-1936. This was done in 1972, under the supervision of John Wallace, OBE, then co-principal of the LSO. The sound quality is rich and dark, with a powerful presence, able to ride over a modern brass section. It demands a strong embouchure and breath control. The HeavyTop version gives even more power than the classic versions.