The MJ Resonance Sleeve is installed on the bell. By adding mass to the bell section, it modifies the local vibrational behavior of the instrument, improving slotting, stabilizing low register response, and increasing tonal focus across all ranges.

The MJ Resonance Sleeve is a removable resonance tube installed on the trumpet’s bell tube. Its primary purpose is to add localized mass and alter the vibrational behavior of the instrument, thereby significantly improving:

• slotting
• stability in the all register
• evenness of response
• projection
• tonal core

These sleeves are typically handcrafted and produced in two versions to accommodate both piston and rotary trumpets.

The versions shown in your photos include:

• a polished model
• a brushed satin model

Both feature the “MJ” emblem along with intricate engraving.

Gold-plated versions are also available, though their pricing varies and requires a separate quotation.