Austin Custom Brass Legacy Series Trumpet Mouthpieces

Austin Custom Brass
acb mpc legacy
$189.99 $175.00
(You save $14.99 )
"Chaps since delivery of my mouthpiece I haven’t been able to put it down. This is by far the best mp I’ve ever owned. Perfect slotting, pure, clean notes, warm sound, super comfortable and a dream tone. Oh and a great service. What more can you ask for :-)" -Leslie
(97 reviews)
1.00 LBS
6.00 (in)
6.00 (in)
3.00 (in)
Free Shipping
Current Stock:
Adding to cart… The item has been added

Please note  as of 1/1/2024 this page will be pre-orders only.  All of our new standard series pieces are in stock and can be ordered at this link:


We are still able to make any one of these older series pieces but only on a custom basis and requiring 6-8 week minimum timeframes for building. 


"Making custom mouthpieces is one of the main reasons I opened up my shop. I wanted to make a mouthpiece that felt comfortable, had a rich sound full of overtones, and didn't zap my endurance! After a lot of time on the lathe, I'm proud to say I've developed a comprehensive offering of mouthpieces sizes for any gig! We have the absolute best tolerances in the industry!" -Trent Austin

Our ACB mouthpiece line covers a huge range of options, giving you incredible control over your sound and taking your performance to the next level. Our goal is to help you get the sound you hear in your head out into the world, as easily and efficiently as possible.

Click here to see the options and equivalencies!


Click the "Videos" section below to see detailed video demonstrations of our mouthpiece line! New videos uploaded frequently, please email us if there's a specific mouthpiece you'd like to hear.

Please call the Mouthpiece Hotline with questions or to place an order! (781) 816-9664


2023 update:  We are slowly discontinuing as stock options a fair amount of our lesser popular sizes and external blanks... they are still all available but some special order pieces will be a slight increased wait.. Email us for lead-times.


You can also email us with questions!

Scroll down to read our detailed descriptions, and customer reviews like these:

"As usual, ACB is killing it! Love the pieces. Comfy. Efficient. Rich sound! What more could you want??!?!" -J

Chaps since delivery of my mouthpiece I haven’t been able to put it down. This is by far the best mp I’ve ever owned. Perfect slotting, pure, clean notes, warm sound, super comfortable and a dream tone. Oh and a great service. What more can you ask for :-)" -Leslie

"I just purchased  TA Screech trumpet mouthpiece. Awesome mouthpiece. It usually took me approximately 2-weeks to get acclimated to a new mouthpiece. Not this one. Bing, bang, boom, my solid note is F# above high C triple forte. Thank you Trent & Josh. You people, as far as I’m concerned are above & beyond. Looking forward to playing the A4 LT mL bore/461 bore..." -Chuck (1.24.21)


Here's a quick video where I discuss some different options I've been playing lately:


Check the insides of some of my most popular sizes!



I also think it's important to have a mouthpiece that looks good! To do this, I've developed a number of blanks (outside shapes) to balance weight, resistance, and player feedback to make your playing more enjoyable and more efficient!



This video is a live session where I discuss the mouthpiece blank options we offer at ACB:

Most of our ACB mouthpieces are in stock in the standard blank. Other ACB blanks are custom made to order and may not be in stock. Please note that almost every manufacturer measures in a slightly different place, so the comparison information sheet is for broad comparisons only.


All custom orders take 2-4 months from payment to build. We do require payment up front. Please review our shipping and return policy

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

We would love to answer any questions you may have about a custom order! Give our Mouthpiece Hotline a call at (781) 816-9664 or email us with questions!


Larger Sized ACB  mouthpieces (.674+) : 

  • Papa Bear: This mouthpiece is not for the faint of heart! It has an extremely large mouthpiece (.684) which puts it around an old Bach 1 diameter. The cup is a large bowl, throat #20 and a custom backbore give this piece the most efficiency while maintaining a HUGE sound.  
  • Bee Bear: Similar to the Papa this mouthpiece has a medium large b-shaped bowl, and slightly smaller backbore.
  • New York 1: This originally started out as a CMM scan of a very early New York Bach 1 mouthpiece. The cup and rim are very similar, the backbore and throat are matched with this cup to produce a very large sound shape. This is a great orchestral mouthpiece!
  • 1C: This is my take on an older Bach 1C but with an improved throat and backbore combo. It feels significantly more efficient and sounds more energized while maintaining a rich core throughout all registers. This mouthpiece has our standard 24 throat and 10/24 combo backbore.

"I've been playing the Cee Bear now for 2 months and the more I use it and the more I compare it to other mouthpieces, the more I like it. It is extremely easy and fast responding, making it much easier for me to play more beautiful. The sound is full, but not dull and works great on my Bb and C trumpet. Even though it is a very large rim, I do not seem to sacrifice any notes in the upper register. My sound on Bb and C never sounded better. I mainly play in a local Orchestra and for that purpose it is the best I ever had." -a satisfied customer


Smaller Symphonic sized mouthpieces (.668-674):

  • 1.25 CB: This has a classic Bach Mt. Vernon 1-1/4C mouthpiece rim that's blended in the CAD  program with a great old Bach 5B cup. The result is an incredibly rich sounding mouthpiece without losing efficiency or having the turbulent points caused by a traditional "screw-rim"  setup.
  •  1.25C: This is  a take on a great 1 1/4C mouthpiece with some refinements in bore, backbore, and throat. To me it feels more like a 1.5C due to the great efficiency. 
  • 1 1/2B: This is a great sounding orchestral mouthpiece. While not as wide as the Papa Bear (the diameter is like a modern 1 1/2) the rim is comfortable and forgiving. The cup bowl is reminiscent of some rotary trumpet mouthpieces. I've always loved those mouthpieces, but the backbores and end shanks are really not made for conventional piston trumpets. My mouthpieces are made to work with piston trumpets and still work really well in rotary trumpets! 
  • 1 1/2C: This is one of my best-selling mouthpieces and extremely comfortable compared to other manufacturers' "cookie cutter" rim contoured 1 1/2's.
  • 1.5 CB: Similar to the 1.25 CB with my ACB 1 1/2C rim

"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


Classic "MV" diameter sized pieces (based on a great Bach Mt. Vernon rim): 

  • MV 1 1/4C: This is my modernized take on the Bach Mt. Vernon 1-1/4C mouthpiece. I match this piece with my O backbore and a slightly enlarged throat and throat entrance. It plays incredibly well and also has a very "classic" sound!
  • 665MC: Slightly larger than the MV 3C, this has a more efficient cup shape than on my MV 3C mouthpieces.
  • MV 3C: Another special mouthpiece, please check out this link for more info:
  • MV3CS: MV3C rim with my CS cup -- it's slightly smaller and also has a much more efficient entrance into the throat. This helps the articulation and adds a lively "zip" to the sound. This mouthpiece is especially good on vintage trumpets or overly dark horns to make them "speak." Paired with the MO backbore for a balanced feel.

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


Medium sized Standard Series Mouthpieces (.630-656)

  • 3: My take on a classic 1928 mouthpiece. I tweaked a bunch inside this mouthpiece and while it still retains the core sound the piece plays considerably more efficiently and consistently in all registers.
  • 3B: Same rim as on my 3C but with a medium deep B-shaped bowl. It's one of my most popular mouthpieces and has an incredibly warm tone!
  • 3C: My take on a fantastic Bach 3C mouthpiece from the late 60's; I have never played a 3C like it. I think the added mass and proper matching backbore make this a formidable all-around mouthpiece!
  • 3CS: Similar to the 3C except it's slightly smaller and has a much more efficient entrance into the throat. It helps the articulation and adds a lively "zip" to the sound. This mouthpiece is especially good on vintage trumpets or overly dark horns to make them "speak".
  • 5B: My modernized take on one of the finest mouthpieces ever made, the Bach New York 5B. I've made the ACB 5B mouthpiece much more efficient than the vintage counterpart while maintaining the great sound shape and spread. It's one of my most popular sizes.
  • 5C: 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!

"I've given Trent's 3C mouthpiece a 5 star review in the past and thought I'd do the same for the 3CS 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


Smaller diameter Standard Series  Mouthpieces:

  • 10 1/2C: While this is a fairly small diameter mouthpiece 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.
  • 10CV: Another new addition to the line, this mouthpiece was made for folks who want a compact efficient commercial mouthpiece but who "bottom-out" on smaller pieces. This rim is very similar to an older Giardinelli 10 and the cup a medium shallow  hybrid v/bowl shape.  The result is a very good all-around show and commercial mouthpiece. It's also an excellent choice for jazz soloists looking for a piece for extended solo work.  
  • 1-27: This is my take on a fantastic vintage piece, the Al Cass 1-27. The cup and rim are loosely based off the Al Cass mouthpiece. I then used a slightly more aggressive entrance into the bowl of the mouthpiece and also a tighter backbore to make the piece zip even more. The inner diameter is around a 7C but with a round and comfortable rim. The cup volume is less than a 7C for sure, so this mouthpiece has a lot more efficiency and sparkle to the sound.
  • Lead 1.25: I've always loved the cup of the Marcinkiewicz Shew 1.25, and played on that mouthpiece for many years. I felt the piece's weight, straight throat, and backbore could be improved for my own use. I designed this mouthpiece to feel more forgiving (especially in this blank) and gained more core in the overall sound shape. This mouthpiece is a weapon for the commercial trumpet player!

"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


TA Series (designed for my own personal playing needs)

  • TA2: It has a cup design which while being fairly shallow bowl shaped has an efficient entrance into the bottom of the cup to make it very efficient without sounding brittle. The rim is semi-flat with good support and is close to a "3-ish" diameter (.664). The TA1 is still my primary piece and I find it fantastic for everything but lead and show playing. That's where the TA2 comes in for me. It feels like a great show mouthpiece. I remember one gig where I played it on some 3 horn Sinatra arrangements and it was great to solo on and then sizzles above high C without getting smaller in sound shape.  
  • TA-Lead: This is  a model I've created for my own lead mouthpiece use. This rim is extremely comfortable, similar to an old Giardinelli 10S mouthpiece but rounder and more forgiving. The cup depth is shallow enough for great compression yet produces an incredibly rich tone in all registers. Standard 28 throat and my "zip" backbore round out this model. It's a great lead mouthpiece for people who tend to "bottom out" on small cups.
  • TA-Screech: A new take on a classic piece... this is a very small, high compression mouthpiece that is surprisingly easy to play. 30 throat and "zip" backbore produces one of the most efficient lead mouthpieces I've ever played! 
  • TA-Z: The TA-Z (or "Zing") might be one of the most comfortable commercial mouthpieces I've designed that can still maintain a beautiful sound from Pedal C to Double C and above. It features a .625 diameter with a medium flat rim and shallow hybrid V/S cup.

"A quick review of the TA2: wow. Now for a more complete review. I really enjoyed it on my gig last night. It was so comfortable and easy to play. I also had to back off my mic a little bit. So much core and center to the sound that it just flew out the bell. It works so well with my [Bach Stradivarius] 43 it's ridiculous. Lots of brilliance to the sound without becoming harsh, especially in the middle and lower registers. It sounds cliche, but as someone who plays mostly bigger pieces for everything else, I've found my perfect lead/commercial piece! Thanks Trent!" -Rob


Here is a list of our backbores in order of tightest to most open:

  • KA3: our newest commercial backbore and it is amazing! Feels almost like the throat is one size smaller due to the compression.
  • KA2: a very nice backbore with good zing.
  • KA1: more core than the A2 and a bit tighter as well.
  • A2: The A2 is a weapon! Designed to be mated with extreme compression mouthpieces, this might be the ultimate commercial backbore I've played. It works great above high C and mates with 27 and 28 tops extremely well!
  • T (Tight): commercial backbore which provides the most resistance and "zing" to your sound.
  • MT (Medium Tight): Provides great resistance, especially for players who tend to "back-up" with very tight commercial backbores.
  • S (Standard): Provides the best balance between resistance and sound spread for most players. 
  • MO (Medium Open): A great slightly open symphonic shape produces a rich, warm tone but still gives ample resistance when needed.  
  • A1: This backbore is a very large, symphonic backbore that is in between the MO and O but feels like it combines both feel and sound shapes from the two other shapes. It's  a wonderful backbore suited for the classical player or jazz soloist wishing for a large sound!
  • O (Open): This is a very large, open backbore designed for the orchestral musician to provide the feel and sound spread that most orchestral players prefer.
  • OO (Very Open): Huge backbore for enormous, rich sound (takes a lot of air).

Specialized backbores:

We also have some specialized backbores that are different than the "standard" line:

  • AOS: Designed for C trumpet players looking for a large and warm sound, it's open and free-blowing. It provides a feel and sound spread that is perfect for orchestral playing and for chamber music.
  • AK: Another specialized C trumpet design, our AK backbore is a very large, symphonic backbore that is based on some of the best of Tottle designs. Used by orchestral players for decades (and very popular at one time in the BSO) the AK is an open backbore with a huge sound! 
  • VNT: a vintage trumpet shank backbore specially designed to work with pre-1930's classic trumpet shanks (King liberties, Holton Revelation, Martin Handcrafts, etc), available here.


Have a question about our mouthpiece offerings? Give us a call on the Mouthpiece Hotline (781) 816-9664 or email us!



The following audio samples are raw with no added effects and totally live. Getting the shop up and running has taken a bit out of my efficiency. I literally went from one piece to the next with no breaks (not ideal when you go from a huge orchestral piece to an efficient lead piece in less than a minute). The differences are more noticeable in these audio clips:


For custom orders use the "contact"  tab above! 

We do a lot of custom work for clients. With our wide range of rims, cups, and backbores we can customize a great mouthpiece for your individual needs.

You can also call the Mouthpiece Hotline with questions or to place an order (781) 816-9664 or email us!

Scroll down for the reviews!




If you have additional questions, please 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.

Austin Custom Brass,  ACB,  Trent Austin,  For sale, custom brass shop, custom trumpet,  Kansas City,  kc, kcmo, Trumpet,mouthpiece, mouthpieces, custom mouthpiece, best trumpet, cheap trumpet, We have mouthpieces equivalet to the Laskey 84D, Warbuton 2D, Laskey 84B, Warbuton 2MD, Laskey 84C, Warbuton 2MC, Hickman GW, Bach 1X, Monette B1-1, 30's Bach NY1, Vincent Bach 1 mouthpiece, Laskey 80B, Haefer, Yamaha 16C4, Schilke 16C4, Bach Mount Vernon 1 1/4C, Curry 1.25BC, Bach 1 1/4C, Bach 1/4 C, Tilz 1 1/4CE, Monette B2, Monette B2S3, ACB 1.25C, MV 1-1/4C, Monette B2LD, Tilze 1 1/2E, Bach 1 1/2B, Monette B3, Curry 1.5BC, Warbuton 3MD, Bach 1.5C, Monette B3, Curry 1.5C, Warbuton 3MC, Bach 1.5C, Monette B3, GR 67, Monette B3L, Bach 1.5D, Mount Vernon 3C, GR 66.5, Mount Vernon 3B, BH3, Monette B4, Bach Mt. Vernon 3, Monette B4S, Bach Mt. Vernon 3D, Monette B4L, Bach 2 1/2C, Bach 3D/E, Curry 3DE., Monette B5L, Bach 3, Bach 3B, Monette B5, Bach 3, Warbuton 4MC, Schilke 14B, Monette B6s1, GR 65M, Pickett 5D, Monette BLM, GR 65M/S, Monette BL, GR 65S, Pickett 5E, New York Bach 5B, Pickett 5B, GR 74.7 MX, Bach 5B, Pickett 5C, Curry 5C, Monette B6, Giardinelli 7M, Bach 7D, Monette B7, Bach 7E, GR 64S, Giardinelli 7S, New York Bach 7, New York Bach 7B, Giardinelli 10M, Marcinkiewicz Shew 2, New York Bach 10 1/2C, Shew Yamaha Lead, Marcinkiewicz Shew 1, Giardinelli 10S, Schilke 14a4a, Monette B4L, Bach MV 3D, Marcinkiewicz Shew 1.75, Vintage Gustat Heim trumpet mouthpiece, Al-Cass 1-27, 


  • 5

    Posted by Tony Bailey on 11th Apr 2024

    I ordered the Super Slug, the customer service/communication was excellent. I was emailed throughout the entire process of creating it to letting me know when it was ready. It arrived in perfect condition. I will be purchasing from ACB again in the future.

  • 5
    ACB 3C Trumpet Mouthpiece

    Posted by Jon Arnold on 4th Feb 2024

    I just love the efficiency, ease of play and the SOUND! Just great mouthpieces and of the highest quality!

  • 5
    The NY and MTV mouthpieces I recently got have been fantastic - right out of the box! Great response and center to notes all through the rregister, low to high!

    Posted by Mary Weber on 5th Jan 2024

    The Austin Brass Trumpet mouthpieces have risen the bar for me!

  • 5
    MV 1.25C

    Posted by CB on 21st Nov 2023

    I seem to be addicted to Austin Custom Brass mouthpieces, thought I guess I've only bought four or five.. I have no idea what Trent is doing differently, but I've never regretted a purchase, as I have with many another more highly and widely touted, and more expensive, mouthpiece (Monette, Lotus, if you're curious). Each ACB piece has impressed me with its playability and distinctiveness--that is, I've never bought one and thought, eh, I've heard this before. I was most surprised by the Clifford Brown piece. I'd thought it'd feel constricted and prove incapable of getting into the lower register, but it comfortably manages anything within my competence. I'm glad I was curious enough to risk the outlay. ACB is great to work with--they play, and whatever the pressures of business may be, they know their stuff, and they do seem eager to get good products into the hands of fellow musicians. I'm a fan.

  • 5
    1B Traditional cup Trumpet mouthpiece

    Posted by Rick Roenne on 12th Oct 2023

    This has to be the best mpc yet. The 2B with the Standard cup gives me a little more resistance than this new one. The standard cup, for me, is the best.

  • 5
    ACB 7M

    Posted by Robert C. on 8th Aug 2023

    The 7M in the standard blank has been a great find for me. I have very thin lips and do best on smaller-diameter mouthpieces with medium-wide rims. The 7M is ideal for me. It is surprisingly warm for a medium-shallow cup, is easy to play, and the rim is very comfortable even when I reach above high C. If you struggle with larger diameters, try this one.

  • 5
    Custom mouthpiece

    Posted by Michael Del Vecchio on 6th Jul 2023

    I have tried many mouthpieces throughout my time playing the trumpet. I ordered an HH custom mouthpiece recently. I cannot express enough my satisfaction with the ACB process and people. The quality of the mouthpiece is outstanding and the service was exceptional. I would recommend ACB to anyone. I will definitely buy from them again.

  • 5
    ACB Mouthpiece 1.25 Lead

    Posted by Vincent Walsh on 11th May 2023

    Another great product from ACB. I keep coming back because the service is fantastic and the products never a disappointment. I'm not looking for the perfect mouthpiece (I can meet the challenge of playing badly on any), I'm using mouthpieces to have fun with the different feel and sounds. Also, I love the vids - products, lessons, comparisons, the lot.

  • 5
    I found The One with ACB.

    Posted by Eric Pena on 10th May 2023

    What I expected to be a lengthy mouthpiece hunt was cut short once I stumbled upon ACB. As someone who makes a living playing my horn, I consider myself extremely specific to what I’m looking for in my equipment. The ACB “Bear” series is the ideal rim shape and size for myself. I tried the different cup sizes and have settled on both a 0 and 0B. Both pieces feel perfect, with the 0 having a huge sound and the 0B feeling easier to play with it’s slightly smaller cup. I’ve seen people with hundreds of mouthpieces and still can’t find The One. ACB saved me from spending tons of money searching for the right mouthpiece. ACB also offers a trial period, so there’s nothing to lose! Currently my main mouthpiece is a size 0 (Formerly Baby Bear) on a gold plated modern blank with a long shank. The modern blanks come standard with short shanks, but I’ve found that the long shank makes the mouthpiece play clearer and has a bigger sound.