Austin Custom Brass

ACB Custom Reserve Trumpet Mouthpieces: The Next Generation!

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1.00 LBS
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MSRP: $329.99
Now: $279.00
Was: $329.99
— You save $50.99




Special Pre-order pricing until June 1st, 2022!


These Custom Reserve pieces are the next step in our development as a company here at ACB. They have taken a few years from concept to initial designs, to working prototypes, to this final project, and we are so excited to share these with you! 


There are a couple of big points to differentiate the Custom Reserve line from our standard series:


  1. The O is underlined in the name for a reason: the Custom Reserve line feels incredibly open. These are designed to be played with a full air stream and as little body tension as possible. We do have a few videos to share with everyone who purchases a CR line mouthpiece to help in the acclimation process. Some will find it instantly easy to go from a standard series piece to the CR line, but even I found it a bit of an adjustment that is 100% worth the effort! The commercial pieces especially are a huge step ahead as they have such a full and rich sound while still maintaining tremendous efficiency. 
  2. The Custom Reserve mouthpieces only come in this exclusive blank and only in brushed gold plate. We could potentially do a silver plated piece on request, but no blank substitutions. This external blank profile design is absolutely paramount to all the of the elements that make these pieces so unique. We will not be offering the Custom Reserve in acrylic or delrin at the moment due to the internal specs being too crucial to the playability of the CR line. We are working on an acrylic rim solution but still have not been happy with the results in prototyping.  
  3. There are no alterations on these pieces because of their design. We can customize a standard series line mouthpiece if needed, but the CR pieces each have very specialized rim, cup, throat, throat length, backbore taper, and other dimensions to optimize them fully. We have spent the time really fine-tuning these!


Here's a quick comparison of the ACB 3C  versus the new CR 3+ (please note I don't normally play this size but had both available at the home studio for a video):


Here's a sneak peek into the TA1L+

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A post shared by Trent Austin (@austincustombrass)

Custom Reserve Mouthpiece Sizes:

The sizes in the Custom Reserve line are also a bit limited, based on over a decade of the most popular models we sell at ACB. Other cups can potentially be ordered but will be a 12-14 week wait most likely.

While totally revised, there are some relative comparisons between our Standard Series line and these Custom Reserve mouthpieces. If you are familiar with the rims in our Standard Series, each of these below they will feel similar on the embouchure.   More detailed videos and technical  information coming shortly. 

  • ACB CR 1.25+ (This piece is modeled after our 1.25CS in the standard series)   

ID .671  OD  1.068 


  • ACB CR 2+ (This piece is modeled after our MV3C in the standard series) 

ID  .664  OD  1.072

  • ACB CR 2D+ (This piece is modeled after our TA2 in the standard series) 

 ID  .664  OD  1.072

  • ACB CR 3B+ (This is a completely new design based on a deeper version of our 3+ with a more B hybrid cup shape)

  ID .653 OD 1.066

  • ACB CR 3+ (This piece is modeled after our 3C in the standard series please check out the comparison video above!)  

ID .653 OD 1.066  

  • ACB CR 4+ (This piece is modeled after our 3CS in the standard series)

 ID .650 OD 1.066

  • ACB CR TA1+ (This piece is modeled after our TA1 in the standard series)  

ID .639 OD 1.084

  • ACB CR TAL+ (This piece is modeled after our TA1L2 in the standard series) 

ID .639 OD 1.084

  • ACB CR TAZ+ (This piece is modeled after our TAZ in the standard series)  

ID .625 OD 1.076

  • ACB CR L1.25+ (This piece is modeled after our Lead 1.25 in the standard series) 

ID .627 OD 1.056

  • ACB CR L3+ (Designed for Shop Manager Kyle Lambert this piece is completely new for this line only!)   

ID .628 OD 1.079



Questions about sizes? Check out this reference guide: 

View this post on Instagram

A post shared by Trent Austin (@austincustombrass)

Free US Shipping on all pre-orders!


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 items.


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2 Reviews

  • 5
    Awesome mouthpiece!

    Posted by Bryant Jordan on 30th Sep 2022

    I've been using ACB mouthpieces for a while, and absolutely love them. The craftmanship and attention to detail is on par with all the other top makes, and they cost a fraction of the price. The Custom Reserve 2+ is now a permanent tool in my arsenal. The intricacy and complexity of sound this piece provides is wonderful. Slots are very even and predictable, and it's easy to play! I now have 3 ACB pieces that I use daily, and haven't played anything better!

  • 5
    ACB Custom Reserve TAL+

    Posted by Greg on 26th Sep 2022

    Does exactly what they say: upper range is easier, lower range still sounds full, endurance is better, and very comfortable for a smaller diameter piece. Very pleased!

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