The PHC 'Medium' rim in a slightly reduced cup diameter.
The Original Range conceived by Anthony Halstead and Anthony Chidell whilst working together in the early 1970's in the London Symphony Orchestra. A most inovative time within the development of the horn, notably in London.
For those who have the strength of embouchure and the physical makeup, the advantages of using wider internal diameter rims are immediately apparent. More of the lip is free to vibrate within the mouthpiece, which allows greater mobility over the entire range and gives the potential for developing a greater variety of tone colours. The M18 is a faithful reproduction of the 'M' rim reduced to an 18mm cup diameter for those who find the original is just too large!
Available in 7 finishes.
Measured at 1.25mm (0.050") depth