3 CVR Flex Trumpet Mouthpiece

Rated 5.00 out of 5 based on 2 customer ratings
(2 customer reviews)

From: $225.00

flex trumpet mouthpiece

Click picture for Flex Mouthpiece Concepts

Mt. Vernon Bach 3 Rim – Inner Diameter = .655″ (16.64 mm)
Our 3 CVR Flex trumpet mouthpiece is a great choice for a player who likes a traditional 3C but is looking for more sound with less effort.

Players coming from a Bach 3C or equivalent report our Flex 3 CVR is 10-30% easier to play with better intonation and a more resonant sound.
This is due to our advanced acoustic design and Flex Alloy.

Most players coming from a Bach 3C, or equivalent prefer our 3 DVR or 3 FVR.

How to Choose/Order

1. Choose an Acoustic Series Click here for Series Advice
2. Choose Silver or Gold Plating
3. Choose three Flex Couplers (included with mouthpiece price)
Click here for how to choose Flex Couplers (Advice and Details)

A Flex Coupler is needed to use this mouthpiece (3 are included in price).
Contact Us with any questions you may have.
(Acoustic Series are listed in order of popularity for this mouthpiece)


Series Information

Weight 0.3 lbs
Dimensions 3 x 1 x 1 in
Series Design (Mouthpiece balance)

By developing mouthpieces as complete systems, or series, we have been able to combine the best internal shapes and sizes to maximize the performance of each mouthpiece. In this manner you are assured of a mouthpiece that has been balanced acoustically for maximum sound and ease of play.




Silver plated, Gold Plated

Flex Alloy

A proprietary brass alloy and treatment. It is extremely resonant and transfers energy very efficiently thus adding to ease of play.

3 CVR 5 Series

Great all around Series. Very good for Jazz Trumpet, Brass Quintet, wedding, and Orchestral including C Trumpet.

3 CVR Vs Series

Speed of Sound Series which is good for Lead Trumpet, Amplified Music, and Pit Work.

3 CVR J6 Series

J6 Series which is good for Lead Trumpet, Amplified Music, and Pit Work. It has more "core" to the sound than the Vs. Some say it requires a little bit more air than our Vs Series.

2 reviews for 3 CVR Flex Trumpet Mouthpiece

  1. Rated 5 out of 5

    Lawrence Wiley

    I have to say that the 3CVR Flex mouthpiece is really and truly the best mouthpiece I have ever used. The cup is extremely efficient, allowing me to just relax and play. I am able to play with a sound that is as dark as anyone would ever need, then also open up and play with a bright sound, the available palate is simply amazing! Intonation is spot on with the 3CVR Flex, the improvement is obvious on any key trumpet I use the mouthpiece on, and the improved resonance is simply fantastic!
    In addition, I asked KO to put my long time favorite rim on the piece, and the work he did is simply amazing! My sincere thanks to both KO and Jon for helping me find my way to this equipment, you guys truly have the most outstanding customer service I have ever experienced. Give Jon or KO a call and let them help you dial in your equipment, you will be glad you did!

    Lawrence Wiley
    USAF Bands retired
    Freelance, Dayton Ohio

  2. Rated 5 out of 5

    Lawrence Wiley

    I recently asked KO for a cup with slightly more volume than my usual and favorite 3C cup. He was happy to help me come up with a solution, and the cup/backbore combination he made for me is amazing!
    The new piece has just enough more volume to give me the sound quality and blow I was looking for and, the custom work KO did cutting and threading my favorite rim to the Flex cup is absolutely perfect!
    Whether you are looking for a standard mouthpiece, or want something customized, you should absolutely give the Flex VR a try, whatever way you go, you will end up with an absolutely fantastic new piece that truly make your job as a trumpet player more easy, and isn’t that what we all want!

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