Angled Rims

Do I Need An Angled Rim?
Most players do not need an angled rim. Angled rims are designed for players who have a specific problem related to an overbite (top teeth in front of lower teeth) or an underbite (top teeth behind lower teeth). 
However, just because you have some overbite does not mean you need an angled rim. The angled rim is only necessary to help with the following issues:
* A very low horn angle that makes it difficult to project your sound.
* Too much pressure on your top or bottom lip.
* Neck discomfort from tilting your head forward or back trying to correct your horn angle.
* TMJ (temporomandibular joint) pain from thrusting your jaw forward.
* Difficulties forming and embouchure because of severe dental malalignment.
Many players have some degree of overbite and a slightly downward or upward horn angle that causes no particular problems. In that case there is no need for an angled rim. However if you have any of the above problems an angled rim might help. Using an angled rim works better than using a bent backbore, since bending the backbore can distort the shape of the inner backbore passage, and interfere with air flow.
Angled Rims and High Brass Mouthpieces
* Angled rims are available as a stock item for trumpet, cornet, and flugelhorn. 
* The angle can be 5° or 10°.
* The 5° angle is enough for most players.
* If you are uncertain what angle you need, Dr. Dave can give you personalized advice based off of a photograph of you playing, taken from the side.
Angled Rims and Low Brass Mouthpieces
* Angled rims are also available as a custom order for trombone, euphonium, tenor horn, and tuba. 
* The degree of angle possible with low brass mouthpieces is between 3 and 5° in most cases.