5 FVR Flex Trumpet Mouthpiece

Rated 5.00 out of 5 based on 1 customer rating
(1 customer review)

From: $225.00


Click picture for Flex Mouthpiece Concepts

Mt. Vernon Bach 5 Rim – Inner Diameter = .655″ (16.64 mm)
Our 5 FVR is extremely popular for chamber music and pit work.

Players coming from a Bach 5C or equivalent report our Flex 5 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.

5 FVR 5 Series

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

5 FVR Vs Series

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

5 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.

1 review for 5 FVR Flex Trumpet Mouthpiece

  1. Rated 5 out of 5

    Max Matzen

    I could probably write an entire testimonial about this mouthpiece!

    This was a match made in heaven. I was playing on a Bach 1.5C mouthpiece for a very long time, and then had a consultation with KO. He had me try various things and I settled on something that felt EXACTLY right … and I didn’t look at the numbers on the mouthpiece. Everything was right .. the color could be bright or not-so-bright if I wanted, articulation was right on the money (4.5 coupler) and things were way easier with flexibility and range. It felt like home to me (I was a 1.5C guy for years and years) … and it was this 5FVR mouthpiece. I still can’t believe it’s smaller! Then to make it even better I tried it on my C, and Eb/D trumpets (after some small adjustments with couplers) and it felt great on each of them.

    In a nutshell, it’s the best mouthpiece I’ve ever tried or owned.

    Max Matzen, Professor of Trumpet, Utah Sate University.

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