3 FVR Flex Trumpet Mouthpiece

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

From: $225.00


Click picture for Flex Mouthpiece Concepts

Mt. Vernon Bach 3 Rim – Inner Diameter = .655″ (16.64 mm)
Our 3 FVR Flex trumpet mouthpiece is a great choice for quintet, wedding, and pit work.

Players coming from a Bach 3C or equivalent report our Flex 3 FVR 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.

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 FVR 5 Series

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

3 FVR Vs Series

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

3 FVR 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.

3 FVR M4G Series

Our M4G Series is the latest development in small volume cup acoustic design. It provides a huge resonant sound with an extremely easy upper register.

2 reviews for 3 FVR Flex Trumpet Mouthpiece

  1. Rated 5 out of 5

    Dennis Barftow (verified owner)

    As a returning player after decades of little playing and not being satisfied with the results from my current mouthpiece, I was in the search of a new one so I contacted Stomvi to inquire about their flex mouthpiece. After an unhurried conversation with KO where he asked many questions about my playing needs and what results I was looking for in a mouthpiece, he recommended the 3 FVR with a 4, 4.5, and 5 coupler. A few days later I received the mouthpiece in the mail. (Let me say that I had been playing a custom mouthpiece which had promised to be my “holy grail” however I was not at all happy with my progress.) I can enthusiastically declare that from the first time I played with the 3 FVR Flex mouthpiece, my playing took a leap ahead at least one year from my current state of progress! Needless to say, I was thrilled then and I am still pleased with this wonderful mouthpiece. Also, I play multiple trumpets by manufacturer and key and having the couplers really help out in fine tuning the gap in each which makes a world of difference in my playing. Thank you to all the staff at Stomvi for always patiently answering my questions. I must also add that it is always a pleasure to be able to talk with the developer and the maker of these fine mouthpieces. You can’t say that about very many mouthpiece makers.

  2. Rated 5 out of 5

    John Maguda

    I am impressed. I can’t believe that after almost 50 years on a Bach 3C, I am switching mouthpieces! Because I play a little on the dark side, the 3 FVR Vs gives me just enough edge to make up the difference. I am totally impressed with the comfort of the rim, the “bullseye” slotting and the quick, full, easy response that the Flex mouthpiece delivers. Until I played a Flex mouthpiece, I’ve not been able to find a mouthpiece with a rim that felt like my old Bach 3C. This m/piece is terrific! Thanks!

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