Best Brass Warm-up Nano Practice Accessory

Best Brass
BB NANO Warmup
$34.99 $26.95
(You save $8.04 )
(8 reviews)
1.00 LBS
3.00 (in)
3.00 (in)
3.00 (in)
Fixed Shipping Cost:
Current Stock:
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Astoundingly small new SOUND TRANSFORMER. How does it work???

Insert it in any Wah-Wah mute.

Transforms your Wah-Wah into a practice mute.

Just insert "Warm-up nano" into your harmon (fits these harmons available from the ACB web store: Best Brass, Faxx, Jo-Ral, Soulo, Tom Crown, and TrumCor) and it reduces volume output to a whisper while maintaining the full tonal characteristics of your favorite mute.

The pitch, intonation, how it speaks, etc. are all kept as-is, so you can always practice with a familiar feel.
(Quietness depends on the mute you use but average noise reduction is about 30DB)


Place on any* mouthpiece!

( * Trumpets, Cornets, Flugelhorns )

As a Buzzing device.

Put your mouthpiece in Warm-up nano, and you can do a buzzing practice. Internal design of nano is acoustically well considered, and it generates appropriate resistances. As a result, your lips will get much more natural vibration.

With the accompanying strap-holder, it can hang on any bags or instrument cases. Now when you hit the road you can warm up anywhere, at any time!
(Notice: It does NOT mute the buzz sound.)


Harmon mute not included.

Please read our Shipping and Returns policy before ordering.

Note that weight listed is shipping weight, not actual weight of item.

If you have any additional questions please send us an email.


Austin Custom Brass,  ACB, Trent Austin, For sale, custom brass shop, custom trumpet,  Kansas City, kc, kcmo, Trumpet, Cornet, Flugelhorn, mouthpiece, mouthpieces, custom mouthpiece,


  • 5
    Nano warm-up!

    Posted by Doug B. on 9th Feb 2024

    Lost mine a while back at a gig and had to have another! Love the feel and response and don’t have to carry another mute around!!

  • 5
    Nano Mute w/ the Soulo Harmon

    Posted by @evolution.evilotus < e. paris > on 17th Aug 2023

    Great extension of the Soulo Harmon mute - provides much more sound-proofing for those late night/early morning discrete practice sessions. Used to use Yamaha's Silent Brass system, but prefer the freer blow of the Nano Mute in the Harmon. Just feels more open.

  • 5
    Best Brass Nano Practice Mute

    Posted by Stuart Yasaki on 25th Jan 2022

    This little mute works! I was surprised by how substantial it is - it has real weight and heft for being so small. As the only trumpet player in the house, I can’t say for sure how it sounds, but I’m told that it is quite a bit softer than an “open” Harmon mute. Playing wise it feels just like a Harmon, without much additional back pressure or stuffiness. I also own a Best Brass Warm Up mute (the one that looks like a pixie) and though I like the volume, it gets stuffy at the top and the bottom. The Nano doesn’t have that issue. I’m very happy with this mute.

  • 5
    Great product

    Posted by Jared on 7th Jan 2022

    I am no fan of practice mutes, in general. It's a sound issue for me. They're effective at making the horn quieter, but they aren't pleasing on the ear. If harmon or cup mutes sounded like practice mutes, I wouldn't use them. But we all, generally speaking, love the harmon mute! This little Best Brass Nano mute allows me to have my harmon mute sound when I practice and it's quiet enough to not bug my cat (who hates my open trumpet sound, of course). This is now my go-to practice mute. Would recommend!

  • 5
    Best Brass Nano

    Posted by Greg on 10th Sep 2019

    Very cool for warmup or for quiet practice. I have it packed with my pocket trumpet and a harmon mute for hotel practice.

  • 5
    Nano practice accessory

    Posted by Anthony Sizemore on 6th Aug 2019

    Works great on my harmon mute. Love the resistance it gives me when I use with my mouthpiece. Great warm up tool , highly recommended.

  • 5
    Best Brass Nano

    Posted by Patrick Gefre on 23rd Mar 2019

    Love it ! Great solution to the practice mute issue. Showed some friends and they ended up getting one too.

  • 5
    Absolutely love it!

    Posted by Andre Park on 15th Jun 2018

    This tiny mute is amazing. Goes into my Harmon and serves as an excellent practice mute while keeping the intonation and sound of my Harmon. When I'm not in need of a practice mute, I can stick my mouthpiece in and use it as a buzzing tube as well. Fits in my mouthpiece case. Highly recommend!