Austin Custom Brass Flugelhorn Mouthpieces

Austin Custom Brass
"Got one of each depth (standard and MDF). The MDF is rich and mellow. The F is great for big band playing. I liked them so much I kept both!" -Carroll
(43 reviews)
1.00 LBS
6.00 (in)
6.00 (in)
6.00 (in)
Current Stock:
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Austin Custom Brass Flugelhorn Mouthpieces

I struggled for a LONG time trying to find a flugelhorn mouthpiece that would do what I wanted it to do, while sounding how I wanted it to sound. That's why ACB now offers a line of flugelhorn mouthpieces designed to the highest possible quality standards. Our ACB Flugelhorn mouthpieces come in three different cup depths, many rim sizes, two shank tapers, and several finishes. Check out the videos below to hear all three depths!

Check out the rims and comparisons here!


FD: Our deepest flugelhorn mouthpiece, designed to give a "horn-like" darkness to your sound. Other extra-deep flugel pieces I've played have been very challenging to keep in tune and also play any notes above the staff. Our FD cup is VERY deep and will most likely require a stronger player to utilize the full capabilities of this piece.

MDF: A general "all-purpose" flugel mouthpiece that is dark enough, yet still easy to project and cut above the staff for when I've had to play first parts on flugel. Our MDF cup is by far the most popular cup depth we sell.

F: This mouthpiece has our shallow cup depth, which works great for occasional flugel doublers, or players who need to play more aggressive flugel parts.


1 Series mouthpieces: Similar to the Papa/00 in the Legacy series, the rim is .684".

1 ¼ seriesthis has a classic Bach Mt. Vernon 1-1/4C mouthpiece rim that's blended in the CAD program to our cups. The rim is .673".

1 ½ Series: this piece has a classic Bach Mt. Vernon 1-½ C mouthpiece rim that's blended in the CAD program to our cups. The rim is .668".

  • "Trent makes some ridiculously good mouthpieces. He's either a genius or completely lottery lucky on mouthpiece designs. His 1.25Orch model is to die for. Try it for yourself" -a satisfied customer

2 Series rim (based on our ACB MV3C rim): this piece has a classic Bach Mt. Vernon 3C mouthpiece rim that's blended in the CAD program to our cups. The rim is .664".

  • "I have the MV3C and the MV3L. Both have a great sound and are really easy to play." -Mario

3 Series mouthpieces: same rim as on my Legacy 3C, which is my take on a fantastic Bach 3C mouthpiece from the late 60's; I have never played a 3C like it.

4 Series rim (based on our ACB 3CS rim): the rim is comfortable, with an inner diameter of .650".

5 Series mouthpieces: long considered a transitional mouthpiece for the student, I've spent a bunch on time on this piece as most of my earlier prototypes didn't make the cut. This mouthpiece has an incredibly rich tone with fantastic articulations and ease in all registers. It's a great, comfortable mouthpiece with a .644" inner diameter!

  • "I've given Trent's 3C mouthpiece a 5 star review in the past and thought I'd do the same for the 3CS (now the 4CS in our new standard line) that I'm currently playing... It's quite simply the most comfortable and most responsive 3C type mouthpiece I've ever played with a fat, warm core to the sound. It's just a super efficient design that sounds great, what else do you need in a mouthpiece! Thanks so much for all the great gear you've made available to the trumpet world, keep up the great work Trent!" -Ray 

10 ½ series mouthpieces: while this is a fairly small diameter mouthpiece (.630") it produces a big tone, with a fine high register and resonating low register. I started with this piece thinking it would a good mouthpiece for students to start on, but I find it very good for all players, especially those with very thin lips and ones who want a bit more corner support.

  • "About a year ago, I switched to the ACB Lead 1. I have virtually played every brand on the market over the past 20 years and nothing has helped secure my playing like the Lead 1. The sound, articulation and projection is second to none. Trent is not only a first class musician but also a first class gentleman and businessman. Kudos to making equipment that works with you to maximize the musician within!" -a satisfied customer

TA1 Series (designed for my own personal playing needs): While the TA1 is based on Clark Terry’s mouthpiece, I made a few alterations and improvements. Clark’s original rim design was VERY flat, so for the TA1 I modified the rim and cup to make it more accessible for today’s modern player. The TA1 rim is still flat, but not nearly as pronounced as on Clark’s mouthpiece. I increased the diameter of the piece as well, as the original was a tiny bit small for my taste. The inner diameter is .639".



Our flugelhorn mouthpieces come in two different shank tapers to fit most flugelhorns. Please indicate what flugelhorn brand and model you play so we can best match the shank for you instrument! Choose the large shank for Adams flugels and our ACB Doubler's Flugelhorn. Please call us if you need a different shank taper.

Call the Mouthpiece Hotline with questions or to place an order! + 816-410-0826 x700

Here's a clip featuring the ACB 1.5C MDF flugelhorn mouthpiece on a few Adams flugelhorns:

Here's a demo video with our TA2F and TA2FD:

Allow 7-9 weeks for the custom builds and plating time.

Please note there are no returns on custom orders. Gold plating is considered a custom order.


If you have additional questions send us an email

Prior to ordering please check our Shipping and Returns policy.

Also note weight indicated in the ad is shipping weight not actual weight of the item.

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  • 5
    4MDF Flugelhorn Mouthpiece

    Posted by Jacqueline Tinberg on 31st May 2024

    I love this mouthpiece! It gives me the sound I was looking for. I have a great horn and this mouthpiece makes it so much more rewarding to play. I get compliments all the time about my sound. Thank you!

  • 5
    ACB 3FL is awesome!

    Posted by Jon Arnold on 4th Feb 2024

    This is my all time favorite flugelhorn mouthpiece. It is the perfect balance of playability and most importantly, the ideal flugelhorn sound. Always first class and high quality. Thanks ACB!

  • 5
    TA1 MDF

    Posted by Bob Miller on 27th Oct 2023

    I've owned a quite a few ACB trumpet & flugelhorn mouthpieces over the years. Recently, I decided to make a switch to a smaller diameter H3S on my trumpet, and wanted my Flugelhorn to match. Josh recommended this one instead of waiting for one with the H3S rim, and I'm actually glad I went with it. The TA1 rim is super comfortable and I'm already thinking about pulling the trigger on a TA1 for my trumpet. The MDF cup is is perfect. Not too dark, not too bright. I play on a Vintage Couesnon, and this mouthpiece seems like a great match. Thanks!

  • 5

    Posted by Basil Rodriguez on 1st Sep 2023

    Very comfortable rim and a nice dark sound without being to tubby (to my ears). Matches beautifully with my Kanstul 925.

  • 5
    TAZ MDF Fluegelhorn Mouthpiece

    Posted by Timothy DenBesten on 3rd Nov 2022

    I asked Josh to suggest a comfortable MP that was similar to my existing trumpet mouthpiece, and he suggested the TAZ MDF. I bought this in a combination deal with the ACB Doublers fluegelhorn. This MP is so easy to pick up and play even though it's completely different than my "screamer" lead trumpet MP. Josh nailed it. I have only used it on a few gigs so far, but this is an excellent MP and I love the way it sounds. I couldn't be happier with this purchase.

  • 5
    Flugel Horn mouthpiece MV3CMDF

    Posted by Al Francisco on 11th Apr 2022

    I purchased an Adams F4 Flugel from ACB in 2o19. I was looking forward to putting it though its paces when Covid hit and pretty much shut down all playing here in Seattle area. That left me to experiment with the difference between my Kanstul 1528 copper bell and the Adams. Using the same mouthpieces that I use on the Kanstul I couldn’t achieve the rich warm and robust sound I was getting on the Kanstul. After an excellent conversation with Josh at ACB I ordered the Flugel mouthpiece. With gigs finally opening back up, I have 4 gigs that will require the use of both trumpet and flugel so working with this new mouthpiece has been awesome. The sound is everything I was hoping for + ease of playing . The first gig is yet to happen but I know I will get the melted butter sound I was missing. Great mouthpiece!

  • 5
    ACB Flugelhorn mouthpiece

    Posted by Michael White on 4th Feb 2022

    This mouthpiece is the ultimate upgrade for the ACB Doubler flugelhorn. I noticed not only increased range and better intonation, but also a much more comfortable playing experience. Although I was quoted an estimated 8 week lead time, the piece arrived in just under 3 weeks. Would definitely recommend.

  • 5

    Posted by Zen Trumpet on 29th Jul 2021

    I was not expecting much but when I received the mouthpiece and started to play wow was I surprised. Comfort, intonation, articulation were all spot on. Somebody (Trent) really did their homework. Not just a good mouthpiece but a great one. The service and advice from Josh was what you would expect from a world class company-the best! Dont take my word for it and try one for yourself. I think you will be more than pleasantly surprised. Cheers!

  • 5
    A great comfortable mouthpiece

    Posted by Robert Moores on 11th Jul 2021

    Just got my ACB flugelhorn mouthpiece and it is sweet! Comfortable, easy-blowing, I've found a flug mouthpiece that I love. Trent, you are the best!