Steve Haefner and Gary Radtke working on trumpet mouthpiece prototypes.

GR Trumpet Mouthpiece Chart:

GR Mouthpiece Chart #2:

Trumpet Mouthpieces

Rim Configurations

The Standard GR Rim is composed of medium characteristics. This rim is comfortable and should be
easy for most players to adapt quickly. The width may feel a bit more generous and will aid endurance.
Flexibility is good yet attacks will not suffer.

The GR G Rim was originally designed by Gary Radtke for his own use but with it's popularity, we decided to add it to our line.  The G Rim has the same bite contour as our Standard rim but the outside radius is slightly larger.  This gives the player more effective rim area on the chops as mouthpiece pressure is applied.  It aids in the distribution of pressure over a larger lip surface which will give support and aid endurance.  This rim does not feel overly wide and flexibilities will not be compromised.

GR Cup Diameters are measured in thousandths of an inch. For example, a mouthpiece from the
65 Series is .650" diameter. A 64.7 is .647" in diameter. This is the measurement at parameter r2.
Please refer to the Mouthpiece Parameters Drawing for further explanation.

Manufacturers measure in different ways using different techniques and points. Making an exact comparison can be difficult. The only accurate way to guarantee an exact fit is to have your present mouthpiece measured, although, most can find a good match using ballpark numbers.

GR Mouthpiece Diameter Comparisons

Comparisons are approximate and are to be used as a reference point only.

 
Cup Volume

GR Mouthpieces  are not measured in depth.  We calculate the cup volumes and believe this to be a more accurate way to define the cup measurement.

Backbores

GR Mouthpiece Backbores are balanced with each mouthpiece model and contain no discontinuities. There are no backbore designations on the mouthpiece itself.

S Cups

The S Cup can be used in varied musical situations.  The sound is big and projection is excellent.  The
backbore is somewhat tight with good core to the brilliant sound.  The S Cup is somewhat small although it has ample lip room for most players.   The alpha angle is not too high that is impinges the lips furthermore, it has the ability to lightly grip and keeps the lips held into place for great endurance.  This
cup is good for lead, show work, studio work, and all-around playing.

MS Cups

The MS Cup has a larger backbore than the S Cup.  This cup has more volume and a slightly lower alpha angle than the S Cup giving the player more lip room.   The sound is big and full with an excellent core.  It has less edge than the S Cup and works well in all playing situations.  This is our most popular cup.

M Cups

The M Cup has the same backbore as the MS Cup.  The cup has slightly more volume than the MS Cup with similar playing characteristics.  The alpha angle is slightly lower for more lip room.  This cup is an option when more lip room is needed.  Works excellent in a variety of playing situations from commercial to concert work.

MX Cups

The MX cup offers more blow resistance than our VC cups.  This cup is excellent for larger less resistant horns and also for lighter chamber work.

L Cups

The L Cup has a lower alpha angle and more volume than the MX.  The 67L cup volume is similar to the 1 1/2C, although, the cup configuration is different.   This mouthpiece is excellent on the Bb and C trumpet.  Many players prefer it on the Bb trumpet.  The sound presence is around you where the MX cup projects with a sound that is more direct. This cup plays very evenly throughout the registers and the sound is rich with overtones.  Great for Concert Band, Wind Ensemble, Brass Quintet, Chamber Work, Orchestral Work, Solo Work, and Jazz.

LX Cups

The LX Cup has a large cup volume with a low alpha angle, much lower than the L. This allows for a lot of lip engagement into the mouthpiece.  A strong embouchure is required to control this mouthpiece and maintain endurance.  Sound is large, full spectrum of overtones, even, and brilliant throughout the horn. Projection is excellent.  Works well on the C and Bb trumpet.

This is a special mouthpiece designed for use on the C trumpet. The rim is a standard GR with the same alpha angle as the L cup.  The upper cup has a little larger radius as does the lower cup and a lower beta angle.

This formula makes more of a V shaped cup but articulation and   brilliance will not suffer.

The throat entrance, throat, bore, and backbore are a little more open than the standard.  This mouthpiece can be played on Bb with good results, although, requires a very strong player.  Many players use the 66L on Bb trumpet and the 66VC on C trumpet.  This is an excellent choice for symphonic applications and use in other large ensembles.  It offers the serious C trumpet player a huge symphonic sound.

The VC cups are available in the 66 and 67 Cup diameters as 66VC and 67VC.
The VC cup may be made in any other diameter as a special order.

GR Standard Rims are made up of medium characteristics. Medium bite, medium round, and medium width. Standard Rims have no designation.

GR "E" Rims have a softer bite, are slightly flatter and wider. They will make the inside diameter feel larger due to the larger and softer bite. For this measurement see parameter "r4" on the GR Mouthpiece Design Parameters drawing.

The GR G Rim was originally designed by Gary Radtke for his own use but with its popularity, we decided to add it to our line. The G Rim has the same bite contour as our Standard rim but the outside radius is slightly larger. This gives the player more effective rim area on the chops as mouthpiece pressure is applied. It aids in the distribution of pressure over a larger lip surface that will give support and aid endurance. This rim does not feel overly wide and flexibility will not be compromised.

GR Technologies gives no reference to CUP DEPTH. CUP DEPTH can be very deceiving and the only accurate way to access a cup is by Volume.