Top players: top jobs
The fact that many leading professional players use PHC mouthpieces proves the success of the design:
| Elspeth Dutch | Principal Horn, City of Birmingham Symphony Orchestra, UK | |
| Kathryn Saunders | 2nd Horn, Royal Philharmonic Orchestra | |
| Frank Lloyd | Virtuoso horn player and Professor of Horn at the Folkwang Academy in Essen | |
| Timothy Jones | Principal Horn, London Symphony Orchestra | |
| Angela Barnes | 2nd Horn, London Symphony Orchestra | |
| John Ryan | 3rd Horn, London Symphony Orchestra | |
| Jonathan Lipton | 4th Horn, London Symphony Orchestra | |
| Hugh Seenan | Session player and Horn Professor, Guildhall School of Music | |
| Reinhard Zmoelnig | 2nd Horn, Volksoper Vienna | |
| Laurence Rogers | Principal Horn, Hallé Orchestra | |
| Richard Bissill | Principal Horn, London Philharmonic Orchestra | |
| Gareth Mollison | 2nd Horn, London Philharmonic Orchestra | |
| Christopher Parkes | 3rd Horn, London Philharmonic Orchestra | |
| Martin Hobbs | 4th Horn, London Philharmonic Orchestra | |
| Laurence Davies | Principal Horn, Royal Philharmonic Orchestra, London | |
| Jeffrey Bryant | Session player and Horn Professor, Guildhall School of Music London | |
| Martin Owen | Principal Horn, BBC Symphony Orchestra | |
| Nigel Black | Principal Horn, Philharmonia Orchestra and Head of Brass, Royal College of Music | |
| Roger Montgomery | Principal Horn, Orchestre Révolutionaire et Romantique and Orchestra of the Age of Enlightenment | |
| Anthony Halstead | Soloist & Principal Horn, The Academy of Ancient Music and The English Concert | |
| John Thurgood | Principal Horn, English National Opera and English Chamber Orchestra | |
| David Posner | Principal horn in the Orchestre Symphonique de Quebec | |
| Robert Ashworth | Principal Horn, Opera North | |
| Andrew Clark | Principal Horn, Orchestra of the Age of Enlightenment and The English Concert. Professor of Natural Horn, Royal Academy of Music | |
| Jonathan Barrett | Principal Horn, Royal Liverpool Philharmonic Orchestra, UK | |
| Robert Cook | Principal Horn, Scottish Chamber Orchestra | |
| Laurence Davies | Principal Horn, Philharmonia Orchestra, London |
Quite apart from the endorsement of the above, amongst many other players, Anthony Halstead's position as a leading exponent of the natural horn has given him an insight into a very convincing historical precedent for the use of larger mouthpieces. In 1810 Domnich recommended an internal cup diameter of 18mm for Ist horn players, together with one of 20mm for 2nd horn players, and as early as 1800 Duvernoy had recommended a cup diameter of 19mm for the 2nd horn.