Hirschman Mutes KR Indigo Plunger Mute for Trumpet!

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Hirschman KR Indigo Plunger
1.00 LBS
Calculated at Checkout


World's Greatest Plunger Mute?


This mute is quickly becoming a customer favorite here at ACB!

The Hirschman Mutes "KR Indigo" Plunger Mute is the culmination of a decades-long quest for the best sounding, BY FAR most in tune, easiest to play, most comfortable to hold, most expressive trumpet plunger that money can buy.

"KR" are the initials of Kenny Rampton, world-renowned trumpet player and long-standing member of the Jazz at Lincoln Center Orchestra under the direction of Wynton Marsalis. Kenny co-designed this plunger with Hirschman Mutes, incorporating feedback from some of today's top trumpet players.


Please note that no coupon or discount codes can be used on this product.

Unique features:

  • IN TUNE! — From low to high, the most in-tune plunger ever.  It also provides consistent pitch when switching between open and closed (tight) plunger, something essential for ensemble passages.  Better intonation means less "lipping" of notes, reducing fatigue and increasing endurance.  
  • Kenny Penny™ venting system —  Some players like to drill a hole through their plungers (where the wooden stick was) and some don't. Others carry two plungers in their bag to have both.  The Kenny Penny venting system provides one penny outside the plunger and another inside.  Turning the outer penny closes the plunger hole with the inner penny.  Kenny Rampton likes it closed for playing over straight mute and open for plunger alone.  There's no right or wrong, and the Kenny Penny lets you discover your ideal sound...that's our "two cents."
  • Handgrip — Our large, comfortable handgrip makes the plunger easy to pick up and hold.  No more slips or drops!
  • Pixie mute killer - Can be used with a standard sized straight mute, so there's no need to buy or lug around a stuffy, out of tune pixie mute anymore.  Throw those in the trash where they belong.
  • Tone hole — With the Kenny Penny in the open position, you can create interesting effects by covering/uncovering the tone hole with a finger.
  • Distinctive color —  Inspired by Duke Ellington's Mood Indigo and Snooky Young's/Clark Terry's blue plungers, with a design updated for the 21st century.

Choose from two sizes

The "KR Indigo MAX" (Height 3.5"/88.9mm, Outer diameter 5.145"/130.7mm, Inner lip diameter 4.21"/106.9mm) is slightly deeper and wider on the outside than the "KR Indigo", providing the ultimate in plunger sound and intonation. Works great on standard bell size trumpets (for example the Bach 37) as well as larger bell trumpets. This mute is also deeper than the regular model, which allows you to use a straight mute as a pixie mute!

The "KR Indigo" model is for players that prefer a more traditionally sized plunger or have a shorter reach. Height 3.375"/85.7mm, Outer diameter 4.81"/122.2mm, Inner lip diameter (same as MAX) 4.21"/106.9mm.


Read what Thomas Gansch, Scotty Barnhart and Marcus Printup have to say about the Hirschman Mutes "KR Indigo" Plunger Mute:

Thomas Gansch — Leader and trumpet, Mnozil Brass - "Brass players listen: I got this beauty from my good friend Kenny Rampton, a master in the art of plunger playing. He developed the KR Indigo Plunger with Hirschman Mutes and it is an absolute must-have. Only the Indigo has the Kenny Penny!"

Scotty Barnhart — Leader and trumpet, Count Basie Orchestra - "Kenny Rampton’s new plunger mute is just great. The intonation is perfect, it fits nicely in my hand, and it’s easy to play in a variety of ways. I love it!”

Marcus Printup —International trumpet soloist and member of the Jazz at Lincoln Center Orchestra - “I’ve always had to teach students how to bend pitch in order to play in tune with a plunger. Bending isn't needed with the Hirschman Mutes KR Indigo because it plays PERFECTLY in tune. Great job Kenny...and you get the Kenny Penny!"


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 item.

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13 Reviews

  • 5
    Awesome plunger. Sounds great.

    Posted by Mike Ramirez on 6th Dec 2023

    Great product

  • 5
    Hirschman plunger mute

    Posted by Arthur Solomon on 13th Apr 2022

    I just used this mute on a big band gig with The II-V-I Orchestra where we played 2 sets of Ellington charts. The intonation was great but the best feature is the depth of the cup which allows you to make better use of your pixie mute

  • 5
    Hirschman KR Indigo Plunger Mute

    Posted by Richard Roenne on 20th Feb 2022

    I was not sure about this mute until Trent showed how the mute could be used with other mutes in the bell at the same time. That sold me. The sound that the trumpet has with this mute shows me a real Dixieland style of playing.

  • 5
    KR Indigo Plunger Mute

    Posted by Mart Avant on 16th Feb 2022

    seen and read the positive info surrounding this KR Mute, I purchased the Standard size last month-- It is absolutely as advertised in that I can use it with my Tom Crown Straight mute with no problems whatsoever, and without the mute the light weight makes it super easy to manipulate-- Great job guys!

  • 5
    Fantastic plunger

    Posted by Jared on 7th Jan 2022

    This is a great plunger. Gone are the days of me going to the hardware store to buy a plunger and remove the stem. The most noticeable difference is in the intonation. This thing responds very well in the low, mid, and high registers. In my experience, your garden variety hardware store plunger is mostly ideal in the mid range. It also fits my larger bell diameter (almost 5.5"!!). I'm no good at imitating Clark Terry (the gold standard), but now I can at least try and be a bit more in tune. Check out the Oscar Peterson + One (Clark Terry) album for reference and you'll want to get better at plunger ASAP. Get this one when you try.

  • 5
    KR Indigo Plunger

    Posted by Brian on 26th Oct 2021

    Take the “plunge” and get this mute! Doesn’t “clog” intonation. You’d be flushing your money down the toilet on anything else. ACB team customer service was stellar! Thank you!

  • 5
    Hirschman Plunger Mute

    Posted by Jeff Hedberg on 27th Jul 2021

    No need to think to twice about this mute. It is amazing! Versatile, in tune, and just downright fun! Yes, the Kenny-penny makes a huge difference, allowing for different sounds and feels. Extremely easy to play, even when fully closed, comfortable to hold. I went with the larger size for a 5.25 inch bell.

  • 5

    Posted by Jay Copenhaver - The Wally Gingers Orchestra on 26th Jul 2021

    Sweet sounding plunger mute, much better than my “Plumber’s Helper” mute!

  • 5
    Killer mute!

    Posted by J on 2nd May 2021

    Get one. You won't be disappointed.

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