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E String Pirastro Obligato 4/4 for Violin (loop end)
This is the Obligato top voice in its loop-end form — for tailpieces whose E adjuster is built in and takes the string on a hook rather than through a ball socket. The build is the line's own: a steel base finished in Goldchrome, 4/4 size, mittel gauge, 8.0 kp of tension, article 313821. It is the E that ships in the Obligato 411025 set, so it puts the instrument's native top back rather than a substitute. Pirastro conceived the line as an all-round synthetic with a warm, full sound whose overtones do not go dull, and the E's job is to give that fullness its shine. Steel answers the bow with no run-up: the note starts the instant the hair touches the string.

🏆 SoundsGood — genuine Pirastro strings only, handmade in Germany.
A Loop Is About Attachment, Not About Grade
Nobody picks a loop for its sound — the tailpiece demands it. Built-in E adjusters clamp the string into a metal hook, where a ball either will not fit or seats crooked and starts buzzing at forte. A loop sits in that hook tight and without play, so the string stays put and the adjuster gives you its full travel. If your tailpiece has a separate fine tuner with a ball socket, the string you want is the same E as article 313121.
Steel Base: Instant Response, Quick Settling
Synthetic strings stretch noticeably in their first days, which means more trips to the pegs. A steel base does not behave that way: it barely elongates, so the E settles first and then holds pitch while the other voices are still bedding in. The second dividend of that steel is speed — spiccato and staccato on the E come out crisp, and harmonics answer on first contact instead of sagging.
The Top String Sets the Brightness of the Whole Violin
A listener reads a violin's overall ring mostly from its top voice: the D and G build the body of the sound, but the shine comes from the E. In a set with warm synthetics underneath, the top string therefore cannot be allowed to go dull — otherwise the instrument starts sounding soft and closed within a month. The gold plating keeps the surface clear of any reaction with perspiration, and 8.0 kp give that brightness something to push against, so it stays concentrated even at the far end of the fingerboard.
Specifications
| Purpose | Single violin string |
| Line | Obligato |
| Note | E |
| Size | 4/4 (full) |
| Gauge | mittel (medium) — the only gauge still produced in 4/4 |
| Base | Steel |
| Finish | Goldchrome — gold-plated steel |
| Tension | 8.0 kp |
| End | Loop end |
| Same E with a ball end | 313121, tension 8.0 kp |
| Plain steel E in this line | 313921 (loop) and 313721 (ball), 7.7 kp |
| Set containing this E | 411025 — Obligato 4/4 set with a loop-end E, 22.6 kp total |
| Pirastro article | 313821 |
| Included | 1 string in a branded Pirastro envelope marked with the article number |
| Country of Manufacture | Germany (handmade) |
What's Included
One loop-end E string in a branded Pirastro envelope showing the article number, the gauge and the end type. The other voices — A, D and G — are ordered separately or as set 411025.
Who It's For
For the violinist whose tailpiece has an integrated E adjuster that needs a loop; for the player who lives in fast passagework and values the instant response of a steel E; and for the Obligato owner restoring the top to factory condition without changing the rest of the set.
Frequently Asked Questions
Who needs the loop-end version specifically?
Anyone whose tailpiece has a built-in E adjuster: the string goes into a metal hook there, and a loop holds tight without play or buzz. If your tailpiece uses a separate ball-socket fine tuner, order article 313121 instead.
Is the loop version the same tension as the ball version?
Yes, 8.0 kp for both. Base, Goldchrome finish and mittel gauge are identical too — only the attachment to the tailpiece differs.
Can a loop-end string be fitted to a ball-socket fine tuner?
That depends on the individual tuner, and forcing a string into a fitting it was not made for is not worth it — order the right version instead. The same Obligato E with a ball end is article 313121, also at 8.0 kp.
How does this E differ from 313921?
In finish and tension. 313821 is Goldchrome gold-plated steel at 8.0 kp; 313921 is unplated plain steel at 7.7 kp. Both are loop end and both are mittel gauge.
Which set does this string ship in?
In Obligato 411025, the loop-end-E version of the set: E 8.0 kp, aluminium A 5.4 kp, silver D 4.7 kp, silver G 4.5 kp, 22.6 kp in total.
Are these genuine Pirastro strings?
Yes. SoundsGood supplies only genuine Pirastro product, handmade in Germany, in branded envelopes marked with article numbers.
🚚 Shipping and Payment
🏆 SoundsGood — full warranty and service support
✅ Quality guarantee — genuine strings only
🏪 Pickup — Kyiv, free
🚚 Nova Poshta / Ukrposhta / Meest — 1–3 days
💳 Installments — PrivatBank, Monobank
🎻 Order the Obligato loop-end E string at SoundsGood! ⚡