Randefalk X-Range Tuba 2-Piece Mouthpiece

The Randefalk X-Range is a two-piece tuba mouthpiece system, allowing you to choose your preferred cup and shank separately. This means you can keep the rim and cup you like while changing the shank to alter the feel, response and suitability for different instruments.

When purchasing a Randefalk X-Range Tuba 2-Piece Mouthpiece, you will be offered the following discounts:

25% discount for Neoprene Tuba Mouthpiece Pouch from Randefalk Musik

25% discount for Randefalk FlowPartner – Adjustable Brass Buzzing & Breathing Trainer

25% discount for Randefalk PolarCase Mouthpiece Pouch

The Randefalk range combines both V- and U-shaped cup characteristics, with a smooth transition into a small cone at the throat. The balance and weight are centred more towards the cup, helping to create a quick response, strong projection and plenty of overtones.

The mouthpieces are made from a heavy copper brass and are available with gold- or silver-plated cups, paired with a gold-plated interchangeable shank.

I choose to play Randefalk mouthpieces for the combination of flexibility, clear articulation, secure intonation and consistent tone quality throughout the register. For me, production feels particularly effortless because of the cup shape.

My main setup is the R3SX with an 8.2 shank. For solo playing requiring particularly demanding range, flexibility or technique, I use the smaller R4SX with an 8.0 shank.

X or SX?

X – Flatter rim with a sharper inner edge, giving a more direct and precise feel.

SX – More rounded rim, giving a more versatile and comfortable feel on the lips. The newer SX design also carries slightly more weight, helping to produce a fuller sound while retaining Randefalk's characteristic accuracy and projection.

The X models have now been discontinued, so the X cups available here are final remaining stock.

Cup Size Guide

R4SX – 31.00mm

Designed primarily for Eb/F tuba. The smallest and shallowest option in the range, offering a particularly quick and agile response.

Comparison: Similar in size to an MB4 or Denis Wick 4L.

R3X / R3SX – 31.80mm

Designed primarily for Eb/F tuba and a very versatile size for players wanting a balance between breadth of sound and responsiveness.

Comparison: Similar in size to an MB4, Denis Wick 3L or Vincent Bach 24W/24AW.

R2X / R2SX – 32.30mm

A slightly larger and deeper option, still very suitable for Eb/F tuba, offering a little more breadth and weight.

Comparison: Similar in size to an MB3, Denis Wick 2L or Vincent Bach 18.

R1.5X / R1.5SX – 33.00mm

A larger mouthpiece particularly suited to Bb/CC tuba, while sitting between the R2 and R1 in size.

Comparison: Similar to an MB2, Denis Wick 1L or Vincent Bach 18, but slightly larger and deeper.

R1X / R1SX – 33.40mm

The largest cup in the X-Range, aimed particularly at Bb and CC tuba players looking for a broad, substantial sound and strong low register.

Comparison: Similar in size to a Vincent Bach 7, Denis Wick 1L or MB1.

Shank Options

8.0 Shank

• 8.0mm throat
• 11.40mm backbore
• Particularly suitable for Eb and F tuba
• Recommended with the smaller R4/R3 cups

8.2 Shank

• 8.2mm throat
• 11.40mm backbore
• Suitable for Eb, F and CC tuba
• A very versatile middle option
• This is the shank I use with my R3SX

8.2L Shank

• 8.2mm throat
• 11.80mm backbore
• Particularly suitable for Bb and CC tuba
• Larger backbore for the bigger instruments and cup sizes
• Recommended particularly with R1/R1.5 cups

All three shanks are interchangeable within the X-Range, so you can experiment with different combinations while keeping your preferred cup.