E String D'Addario Kaplan Non-Whistling 4/4 for Violin (medium tension)

This is not just another E but a string built for one job: D'Addario calls it a fix for open-string whistling — "The Kaplan Solutions Non-Whistling E string is specifically designed to solve open E-string 'whistling' occurrences." The construction is unusual too: a stranded steel core under an aluminium winding instead of the familiar solid steel cord. Article KS311W 4/4M covers 4/4 at medium tension — 18.6 lb — with a ball end and a 13 in (328 mm) playing length. A Kaplan Solutions Ball End Adapter (KSAA) is included for hook-style fine tuners. The maker describes the tone as warm and rich, blending well with the lower strings, so the top voice does not detach from the rest of the set.

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A Stranded Core Instead of a Solid Cord

An ordinary E is one solid steel filament; here the inside is stranded steel and the outside is an aluminium winding. The maker credits that construction directly: "Offering a smooth, stable tone thanks to its aluminum-wound stranded steel core, it's perfect for violinists who need crisp clarity under pressure." In practice you hear two things — the harsh upper overtones that make a steel E prickly are gone, and with them the piercing open-string whistle that always arrives at the worst possible bar. D'Addario publishes no deeper technical explanation, so the facts here are the construction and the result.

18.6 lb: Density Under Bow Pressure

This is a tight string, and that is part of the design: under a heavy bow the higher tension keeps the core from giving way and breaking into a parasitic squeal, so a forte phrase stays clean. The maker claims a short break-in time and excellent bow response, while a precision plating process gives enhanced corrosion resistance, so sweaty hands do not dull the string in a fortnight. The tone is still described as warm and rich and well blended with the lower strings, so crossing from the A to the E brings no sudden jump in brightness.

Fits Any Set, and the Adapter Is in the Box

There is no full Kaplan Non-Whistling set: this is deliberately a single E, bought to replace the stock top string of a set from any series. It is ball-ended, and for single-hook fine tuners D'Addario includes a Kaplan Solutions Ball End Adapter (KSAA) in the pack, so there is no separate part to hunt down. The catalogue holds one version only — 4/4, medium — so there is no gauge decision to make and very little to get wrong when ordering.

Specifications

What's Included

One E string in official D'Addario packaging marked KS311W 4/4M. The maker includes a Kaplan Solutions Ball End Adapter (KSAA) for single-hook fine tuners alongside it.

Who It's For

A string for the player whose open E whistles at the worst moment, for the orchestral violinist who needs clarity under bow pressure at forte, and for the owner of a bright instrument who wants a warmer top that blends with the lower strings without replacing the whole set.

Frequently Asked Questions

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