Eastman ETB848 Bass Trombone Overview

The Eastman ETB848 is a professional bass trombone designed for players who need the register access and flexibility of an independent double-valve instrument. Its open-wrap rotary layout places it firmly within the modern orchestral and ensemble tradition, with a configuration suited to serious section, solo, and commercial work. The ETB848 is a practical consideration for advancing and professional bass trombonists seeking a full-featured instrument outside a modular custom system.

Eastman ETB848 Bass Trombone Specifications

• Key: Bb with F and Gb attachments
• Bore Size: .562 inch
• Bell Diameter: 9.5 inches
• Bell Material: Yellow brass
• Finish: Clear lacquer
• Valve Configuration: Two independent rotary valves with open-wrap tubing
• Case: Eastman padded case
• Accessories: Laskey 90D large-shank mouthpiece, valve oil, trombone slide lubricant, tuning-slide lubricant, and polishing cloth
• Serial Number: S2504085

Condition & Setup

This lightly used ETB848 is in excellent playing order and has been professionally serviced, set up, and play-tested. The clear lacquer is well preserved overall, with faint superficial handling marks and fine scratches visible in a few reflective areas. The bell, handslide, braces, dual-rotor section, linkages, and tuning-slide assemblies are externally complete and present well.

Who the ETB848 Bass Trombone Is For

The ETB848 is intended for advanced and professional bass trombonists working in orchestras, wind ensembles, brass bands, pit orchestras, and commercial settings. Its .562-inch bore and yellow brass bell support a centered, projecting bass-trombone concept with room for broad dynamics, while the independent valve layout gives the player flexible access to the low register. It is especially appropriate for musicians who prefer traditional rotary valves and an open-wrap configuration.

Common Questions About the Eastman ETB848

What does the independent F and Gb valve system offer?

Each valve can be used separately, allowing the player to select the F attachment, the Gb attachment, or both valves together. This expands alternate-position options and supports chromatic access through the bass trombone's low register.

How does the open-wrap design affect the instrument?

An open-wrap layout uses fewer tight bends in the attachment tubing. Many bass trombonists choose this design for a more direct response and a freer feel when the valves are engaged.

Where does the ETB848 fit within Eastman's trombone line?

The ETB848 is Eastman's professional independent-rotor bass trombone. It shares the core professional bass-trombone format of the ETB849, while the ETB849 substitutes axial-flow valves for the ETB848's rotary valves.

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