Frequently Asked Questions

The KR Indigo BIG BLUE plunger is designed for both tenor and bass trombone. Bass trombonists Dave Taylor and Earl McIntyre were two of our early testers and endorsing artists who gave invaluable feedback during the development of this mute.

Yes! Contact us for a 10% discount for educational programs and military orders of 5 or more mutes.

It’s a personal preference that depends on which size mute you are most comfortable holding. Both models fit well on almost any size bell, so that should not be a consideration. The KR Indigo MAX offers the ultimate in intonation and will provide more clearance for straight mutes, while the KR Indigo model is great for young players and those who prefer a more traditionally sized plunger.

Probably! We added extra “lip” to ensure there’s plenty of “landing room” and it works with all but the very smallest bells. Check out our specifications for exact dimensions.

We made the mutes in blue as a tribute to Snooky Young and Clark Terry, two of the greatest plunger trumpeters of all time who both played blue plungers. No other colors are available.

The KR Indigo BIG BLUE plunger is the perfect mute for section playing, with the world's best intonation and our Kenny Penny venting system. The WG Cone Tone is designed to be the ideal SOLOIST'S Mute, but it also appeals to players with a shorter reach or who prefer a more traditionally sized plunger. Feel free to buy both!!!

While technically known as a butterfly valve, we call it the "Kenny Penny"™. The Kenny Penny is a brass rod with a penny "handle" on the outside and another penny on the inside. The hole in the center of the plunger is fully opened (vented) or closed (unvented) when the outer penny is rotated a quarter turn.

Some folks like a hole drilled in the center of their plunger and some don't, and others carry two plungers in their bag to have both. Now you can have either by rotating the Kenny Penny. Plunger master Al Grey advised trombone and trumpet players not to drill a hole through their plungers. Kenny Rampton likes to keep his plunger closed when playing with a pixie straight mute and open when playing plunger alone. There's no right or wrong way, and the Kenny Penny lets you discover your ideal sound.

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.

The "KR Indigo" model is for players who 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.