Spirocore 1/2 Bass D String: Medium

The Spirocore 1/2 Bass D String: Medium is a premium replacement string for double bass players who want a responsive feel, strong projection, and dependable longevity on a smaller instrument. Johnson String describes Spirocore bass strings as built with a flexible multiwire spiral rope core that creates a longer period of musical vibration while significantly reducing inertia. That construction helps the string feel lively and quick under the bow or the hand, making it a strong choice for advancing students, serious amateurs, and professional bassists using a 1/2 size instrument.

As part of the Thomastik-Infeld Spirocore orchestra line, this medium-gauge D string is designed to work equally well for arco and pizzicato playing. Thomastik identifies the matching 1/2 scale single D string as model 3887,3 and lists chrome winding with a spiral core construction for this size range. For bassists looking for a high-performance upright bass D string with a clear, focused sound and a well-established reputation in orchestral, jazz, and crossover settings, Spirocore remains one of the most trusted names in the category.

Features & Specifications

• Instrument Fit: Sized for 1/2 double bass.
• String: D string.
• Gauge: Medium gauge.
• Core Material: Steel core with flexible multiwire spiral rope construction.
• Winding Material: Chromesteel or chrome winding.
• String End: Ball end / crimp ball end.
• Tone & Vibration: Designed for a longer period of musical vibration with reduced inertia.
• Response: Equally effective for arco and pizzicato playing, with high responsiveness.
• Durability: Built for long-lasting performance.
• Manufacturer Model: Thomastik-Infeld model 3887,3.
• Brand: Spirocore by Thomastik-Infeld.
• Line: Part of the Spirocore Orchestra double bass series.