Austin Custom Brass

Austin Custom Brass MV 3C Special Mouthpieces

(26 reviews) Write a Review
2.00 LBS
$7.00 (Fixed Shipping Cost)
  • Austin Custom Brass MV 3C Special Mouthpieces
  • Austin Custom Brass MV 3C Special Mouthpieces
"I didn’t need to play around on it for more than a few minutes to know it had rendered the previous dozen mouthpieces I purchased unnecessary. It’s extraordinary." -Ryan Wooden


My #1 selling mouthpiece at ACB!

I have often wondered why you see the eBay auctions of Bach Mount Vernon 3C mouthpieces routinely sell for $400 or more. Is there something special and different about these pieces versus a modern 3C?

Well... the answer I found out is YES!

The only problem was that the rarity and price of the vintage Mt. Vernon 3C mouthpieces made them inaccessible to most players. The ACB MV 3C makes this sought-after design available again, at an affordable price.

Check out the overlay below for a comparison of my standard 3C (in red) to the ACB MV 3C:



I started this design by scanning four different Mt. Vernon Bach 3C mouthpieces, then combined their best aspects into my ACB MV 3C design. As you can see there are some differences in the rim, the entrance to the throat, and especially in the cup shape and volume. The MV 3C is a bit bigger all around than the traditional 3C. For me it feels a tiny bit smaller than a 1 1/2C, with an exceptionally comfortable rim.

I’ve matched this top with my MO backbore (medium-open, smaller symphonic shape) and a #26 throat. The resulting sound is tremendously rich!

Although this mouthpiece is a little bigger overall than a traditional 3C design, it actually has great efficiency. Many customers have mentioned the great brilliance and core to the sound in the upper register, as well as improved response at softer dynamics throughout the whole range of the horn. Attacks are clean, crisp, and reliable. You can check the reviews below to see what some of our customers were playing before making the switch to an ACB MV 3C.

You can customize the tone a bit more through your choice of outer blank (the most popular choices on this piece are our standard, traditional, and modern blanks). All non-standard blank ACB pieces are custom orders and take 4 weeks.

If you’re thinking about a new mouthpiece in the 3C-1 1/2C range and you want a great all-around option, experience for yourself why the MV 3C has become our best selling mouthpiece at ACB!


If you have additional questions send us an email.

You can also call our Mouthpiece Hotline with questions or to place an order! +1-781-816-9664

Prior to ordering please check our Shipping and Returns policy.

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

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26 Reviews

  • 5
    Very satisfying and very versatile

    Posted by Julien Wurtz on 22nd Mar 2022

    This mouthpiece is a blast to play, very comfortable, vibrant and focused tone, it has everything you want! Great job, ACB!

  • 5

    Posted by Alex Pawlowski on 27th Dec 2021

    I played on a normal 3C, and wanted to see what else was out there for this common size, so I tried the MV3C. What everyone is saying is completely true. It plays fantastic in all registers and all dynamic levels, is very comfortable compared to a 3C, and I have way better range and stronger upper register even though it is a deeper cup! I have it in the modern blank, and it is a gorgeous mouthpiece. It works perfectly in my Adams A4LT, and gets a nice, warm, rich sound. Thanks again to everyone at ACB, and as always I am so happy with the customer service and expertise that they offer.

  • 5
    LOVE IT!!!

    Posted by Glenn Muller on 24th Mar 2021

    Okay, did I say I LOVE IT? I've been mouthpiece shopping for a while. Been playing on a modern Bach 1 1/2C. The modern Bach's just aren't the same as the old Mount Vernon pieces. Tried the shallow version [MV3Cs], but felt a bit too shallow and bright for my taste. Swapped out for regular version [MV3C] with modern slug. Much better, for me. It blows very easily. Love the response and projection. Dynamic contrast is fantastic. I can see why this is such a popular mouthpiece. Thanks Josh & the rest of the team at ACB.

  • 4
    Very comfortable on the lips

    Posted by Aaron Wood on 10th Feb 2021

    This is the most comfortable on the lips mouthpiece I have tried (I have only tried a few to compare). It's a tiny bit bigger than a standard Bach 3C and Curry 3C, for size comparison. Felt more easy to blow and get a buzz going compared to those other MPs I've tried. It might be just a little big for me (at least with as little practice as I do/have time for). It feels and looks like a quality product, so if you have hesitation to trying an ACB custom mouthpiece, I wholeheartedly say "Go for it!" I think I have medium-sized lips -- hopefully I can grow into this mouthpiece, as I really like it for a nice open sound. Also looking forward to trying out a TA-1, which is in the mail!

  • 5
    MV 3C Trumpet Mouthpiece

    Posted by Mark Alderman on 20th Dec 2020

    This is indeed a very accurate copy of the old Bach Mount Vernon 3C trumpet mouthpiece. While not as deep as a current day 3B this mouthpiece is a great compromise as it will brighten up in the upper register, while providing a big full tone in the lows and mids. Perfect for moving between classical, chamber and jazz! Give it a try!

  • 5
    MV3C Quality Sound

    Posted by Greg Kalbaugh on 25th Feb 2020

    Aside from practice at home, used my recent MV3C purchase for the first time last night at a three hour gig. Must say the quality and performance was more than expected. Added a darker resonance of sound to the jazz. Both comfortable and reliable. Found it to be heads above my Bach 3C.

  • 5
    The best

    Posted by Erik on 24th Jan 2020

    I've played Monette, GR, and Curry, but when I discovered this ACB MV3C, it instantly became my favorite and I've been playing this Mpc for years now. For me, it's the great full tone, ease and evenness throughout all registers, versatility in playing all kinds of styles. It's super comfortable and it even looks cool to boot. It's just the best mouthpiece I've ever played.

  • 5
    ACB MV3C is my go to MP

    Posted by Tim O'Toole on 17th Jan 2020

    I started playing the MV3C about a year ago and I cannot even describe how much it has done for me as a player. I am playing higher with better endurance and slotting so much cleaner with this mouthpiece than my old Stork 3D. I've tried a couple of Monette MP in the past year and sadly had to sell them for a loss on ebay because they were not as comfortable and I was not getting the sound or range that I wanted. Simply put this mouthpiece is amazing! I have the same setup for my ACB Flugelhorn and it plays magnificent!

  • 5
    Stunning mouthpiece. Instant favorite.

    Posted by Ryan Wooden on 26th Sep 2019

    I just received this mouthpiece the day of this review. I didn’t need to play around on it for more than a few minutes to know it had rendered the previous dozen mouthpieces I purchased unnecessary. It’s extraordinary. While part of me wishes I had found this gem first, I am also glad I worked my way through the gamut of available options before landing here because I feel very confident ending my go-to mouthpiece search. I haven’t felt this confident in any of the others I’ve purchased, despite spending significant research and money on them. While I can’t compare this to a vintage Mount Vernon 3C because I haven’t used one, I can speak to its functionality. The rim is extremely comfortable compared to other 3Cs I’ve used and owned; it isn’t too sharp, but doesn’t shy away from the lip either. My trumpet feels more responsive with this piece, even at soft, low-pitched passages. In appearance, it is beautifully shaped and finished. If I find anything negative to report, I will return to edit this review. At this time, I am the very happy owner of my new MV 3C. P.S. Trent answered the phone when I called to check up on my order. I recognized his voice from his YouTube videos. He is refreshingly friendly and patient. I won’t hesitate to call him with questions in the future and you shouldn’t either.

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