Thomastik Peter Infield 3/4 Do - Medium

A Peter Infeld string designed for demanding double bassists

The Peter Infeld PI64C is a low C string designed for 3/4-size double basses. It is aimed at musicians seeking an immediate response, generous projection and a low register that remains clear even as playing intensity increases. Its balance of power and refinement preserves the instrument’s acoustic character without unnecessarily hardening its tone.

Its spiral core combines tuning stability, durability and playing comfort. The chrome steel winding contributes to precise attack while promoting consistent tonal response over time. This design is particularly well suited to players looking for a reliable low string for daily practice, demanding rehearsals and stage performances.

For orchestral playing, advanced study and expressive bowing

This double bass string is suitable for intermediate-advanced to professional musicians. Its responsive feel supports nuanced bowing, from clear attacks to long sustained notes. It will naturally find its place in classical, symphonic and contemporary repertoires, as well as in any situation where low-end depth must remain articulate.

Thanks to its well-defined midrange, the PI64C helps the bass line maintain a strong presence within an ensemble. It is well suited to double bassists who prioritize a stable response, wide dynamics and a feeling of control from the frog to the tip of the bow.

The sound

The Peter Infeld PI64C delivers a broad, dense and well-controlled low end without sacrificing clarity. Its tonal character is based on a balance of depth, rich tonal colors and focused sound. The midrange remains particularly present, helping to define the notes and integrate the double bass within the section.

The chrome steel winding provides a clear attack and an even response under the bow. Combined with the spiral core, this construction promotes generous sustain and a stable response. The result is a low C string with a bold sound, capable of supporting pianissimo nuances as well as more powerful orchestral passages.

Technical specifications

Format	3/4	Category	double bass
Tension	Medium	Nbr of strings	1

Instrument	acoustic double bass	Design	new combination of materials around a proven spiral core
Compatible size	3/4	Sound	powerful, elegant and rich in colour
Tuning	orchestral	Midrange	focused and assertive
String	low C	Bow response	excellent
String reference	PI64C	Low end	generous and well defined
Compatible vibrating length	from 1030 to 1100 mm	Sustain	stable and extended
Core	spiral	Reliability	high
Winding	chrome steel