

- ・Easy high notes
- ・Stable low register
- ・Great endurance
- ・Clear articulation
- ・More sound from less effort
- ・Precise pitch

A revolutionary concept
- The Groove Mouthpieces -
The Groove Series Mouthpieces:
A new generation in design with a multi-length system and “groove” concept
Feature 1: Maximizing potential of the instrument. ―――――――
The Groove mouthpieces adopt a unique concept called a “Multi-Length System.” With this new concept, the hidden potential of your instrument will blossom. Brass instrumentalists want to make the best quality sound on their instruments, and the Groove mouthpiece will help you achieve that goal.
Feature 2: Boosting up the player’s potential.――――――――――
The basis of beautiful sound of any brass instrument is in the vibration of the lips. Groove mouthpieces have a special structure called “The Groove.”which efficiently assists this vibration. With this patent-registered invention, it will be easier to play in both high or low registers, which subsequently enhances endurance and richness of tone.
The unique concepts which characterize Best Brass mouthpieces.
Multi-length System

“The more shallow the cup, the longer the length. The deeper the cup, the shorter the length.” This new approach means the preliminary tuning of the instrument is accomplished by mouthpiece length. The appropriate length of each mouthpiece model is derived from years of experience and research, and the pitch always stays in tune on any Groove model while maintaining the original placement of the tuning slide. With the Multi-length system, the instrument naturally finds its most efficient slot.
Does a mouthpiece change the pitch?
Check the cup depth of your mouthpiece.
The optimal position of the tuning slide.
The Groove Structure
As you can see in the picture above, all Groove mouthpieces have a special invention at the throat. Best Brass named this concept “The Groove,” generating slight resistance which assists the vibration of the lips. Though “resistance” may sound like a bad thing, this will actually achieve a smoother blow and larger sound because lips vibrate more efficiently when the air encounters resistance.
Resistance??
Where is the best part to generate the resistance??
A new mouthpiece standard !?
– introducing the model 'KAI(改)'
A new invention from Best Brass :
the "Accelerator"
Debuting five new models for trumpet: 1C改, 3C改, 5C改, 7C改,and 9C改, powered by a completely new structure (pictured above). This is a new development from Best Brass, and we call it 'Accelerator.'
As described above, ‘Groove' assists the vibration of the lips in all registers, but the 'Accelerator' produces this effect specifically in high registers, and will literally accelerate the vibration, allowing the player to easily add up to a fifth to your range*, all while keeping the rich sound and rim comfort of our C cup. Whether you currently play our mouthpieces or not, you're going to want to give Kai a try!
* we should note that some of our testers were unable to adapt to this unorthodox design, but about three out of four were able to add significantly to their high register. The result is quite surprising even to us!
The distinctive designs.
The distinctive design of the Groove mouthpiece creates a visual as well as tonal personality, and the simple yet ingenious set up differentiates them from any other brand and leaves a strong impression. The Groove mouthpieces are characterized by an incredible attention to every single part of the mouthpieces: BB (Best Brass) rim, textured cup, Groove throat, and Mensur backbore, and is shaped from a round bar of brass using a precisian diamond lathe and tools developed in-house. Once you try our mouthpieces, your playing experience will forever be changed for the better.
BB Rim
Textured Cup
Throat
Backbore
Shank
Outer shape design and weight.
For more detail
→ please download these PDF files!

・Foreword:Transitions of brass instruments and mouthpieces
・Part 1:How to select the best mouthpiece for you.
:Parts descriptions of brass mouthpieces
・Part 2:Groove Series
・Part 3:Improving your performance
・ Tips:Fingering chart - TrumpetTrumpet
Horn
Euphonium
: Position chart - Trombone
: Correlation chart of piano fingerboard and registers of brass instruments
These PDF files are from a mouthpiece handbook called “We’ve got the Groove”. It would be our pleasure to include this handbook to anyone who purchases a mouthpiece from Best Brass.
Model

For Trumpet

For Flugelhorn

For Cornet

For Horn

For Horn(AX model)

For Trombone

For BassTrombone

For Euphonium/Trombone
New! Pure Titanium!

Here is the world's first pure titanium mouthpiece using our M.I.M technology! This totally new product will be great for all trumpeters who looking for a new sound.
Old model profile
Powerpiece
High power mouthpiece with a modern design. Smooth feel and remarkably far-carrying sound.
Signature mouthpieces
The collaborations with Japan’s top players: