GR Trumpet Mouthpiece 4-63 M Northern Brass

Description

This is a Northern Brass Trumpet mouthpiece inner diameter .630 size with a comfortable rim and a medium cup. The 4-63M was Added to the line in 2021. See the info below for more info about this great line of mouthpieces!
All Northern Brass models are mathematically and acoustically designed by GR Technologies to create unique high efficiency mouthpieces that are capable of much more than just assisting the upper register.
Originally designed and manufactured by GR as custom designs to help solve the problems inherent in mouthpieces designed for upper register work, and for efficient all around playing.
Why Northern Brass?
Very high alpha angles can not be played well by most players. The sound becomes brittle and articulations are very sloppy. This is also the major cause of "Bottoming out". We at GR call it "Death by Alpha Angle". Many manufacturers use a very high alpha angle in their "upper register" mouthpieces.
One the contrary, very low alpha angles can make articulations harsh and sound very tinny. Often initial attacks will be accompanied by the dreaded "Air Ball". Some manufacturers incorporate the low alpha angle in their "upper register" designs. If your mouthpiece wall goes almost straight down from the rim, you have a very low alpha angle.
GR designed the NB mouthpieces keeping in mind first, an alpha angle which is playable by the majority of players. This unique alpha angle was developed in order to keep the chops supple and free to vibrate, yet provide support and fast, clean articulations. Players will experience a much broader spectrum of sound with NB compared to many other commercial / lead designs. Higher as well as lower overtones are full and in focus.
Northern Brass Mouthpieces are known for their solid upper register, but not at the expense of producing a good sound in the low and middle registers, pointed articulations, and acrobatic flexibility make the NB some of the most versatile mouthpieces available.
Rim:
The first number indicates rim contour.
The 4 rim is wide and semi flat comfortable without causing excess lip impingement.
The 3 rim has a more rounded feel with good support without feeling too narrow.
Both of these rims have a very soft bite and are very comfortable.
A unique benefit from the Northern Brass rim design is that with their width and high point placement it makes the smaller diameters diameters feel larger than you might expect thus making it easier to downsize as that you have the lip engagement of a larger diameter while gaining the efficiency of the smaller cup.
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Cup Diameter:
The 2 digit number is the rim inner diameter (63=.630) (64=.640) (65=.650) (66=.660)
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Cup:
The stars ***, ****, ***** identifies the cup type.
The *** is a shallow cup. Bright but fat trumpet sound.
The **** is medium shallow with slightly darker sound very flexible.
The ***** is slightly deeper than the **** and allows more lip in the cup with a slightly broader sound yet still very efficient.
The M cup is based on the popular GR M cup great for efficient all around playing and is the deepest cup in the Northern Brass Line.
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Backbore:
GR #1. Provides focus, efficiency, and a flexible FAT sound.
GR #2. Used only on the M cup models.
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Blank:
GR "Classic" Blank is used
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