Thomastik Infeld Red 4/4 - D Hydronal (IR03)

A series designed to shape the instrument's character

The Infeld series stands out by offering a practical approach to sound "tuning" through string choice. The "Red" and "Blue" sets were conceived to be combinable: you can thus adjust brightness, density, and projection feel by changing one or two strings without disrupting the violin's tension balance. In this logic, the "Red" version aims for a darker, rounder, and deeper aesthetic, particularly useful when the instrument tends to sound bright or when more substance under the bow is desired.

Intended use and musician

This 4/4 set is intended for violinists from intermediate level upwards, as well as advanced players who wish to refine their instrument's color with a coherent and adaptable solution. It suits both daily practice (scales, intonation study, bow control) and contexts where a warmer timbral identity is sought: chamber music, Romantic repertoire, or any situation where a denser, less brilliant sound is preferred. The ability to mix with the "Blue" set also makes it a relevant choice to adapt to a venue, a bow, or seasonal changes in the violin.

Sound characteristics

With a composite (hybrid) core, the Infeld "Red" set aims for a consistent response and balanced feel, while maintaining good playing stability. The E string in gold-plated chrome steel promotes a clear and precise attack, with a sense of hold under the bow and clear definition in the upper register. The A and D strings wound with Hydronalium (an aluminum, magnesium, manganese alloy) contribute to controlled projection and a refined color, while the G string wound with silver emphasizes density and depth in the lower register. The set is designed to support a violin with a naturally bright timbre or to add more roundness and harmonic "darkness" without losing the overall balance of the set.

Technical specifications

Type of cord attachment	Loop end	Spun	Hydronalium
Category	Violine	Material	Composite core
Draw	4/4	Special feature	ball
Nbr of strings	4	Color	Grey

Instrumentation	violin	Winding	Hydronalium (aluminum, magnesium, manganese alloy)
Size	4/4	Total announced tension	22.8 kp (50.1 lbs)
Core	composite (hybrid)	Set feature	"Red" and "Blue" sets' strings can be combined to adjust the tonal character without changing string tension
Finish	chrome steel, gold-plated	"Red" sound orientation	enhances the instrument's dark sound
Tension	8.0 kg (17.6 lbs)