Strings
Pirastro Obligato Viola Strings
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Pirastro Obligato · Single Viola String
Obligato, warmth and
tonal richness.
Individual A, D, G and C strings in Pirastro Obligato's signature synthetic-core construction. Deep, dark tone with smooth fullness across the full dynamic range.
About Obligato
Synthetic core, gut-like warmth.
Pirastro Obligato strings are synthetic core strings engineered to replicate the warmth and tonal complexity of gut strings, without the instability that comes with natural gut. The viola range delivers a deep, dark tone with smooth fullness, making Obligato one of the most consistent warm-voiced options available for 4/4 viola.
The construction keeps pitch stable across temperature and humidity changes, which suits rehearsal schedules and touring musicians alike. Players who prefer a mellow, complex character over brightness or cut tend to return to Obligato season after season.
The four strings
Each string, in detail.
Clear, warm top voice
The A string opens with a clear, focused tone that does not harden under pressure. It transitions smoothly to the D string, avoiding any tonal gap between the upper pair.
Full-bodied middle
The D sits at the tonal centre of the instrument. Obligato's synthetic core keeps it round and full, with enough body to project in ensemble textures without losing warmth.
Rich, dark lower voice
The G carries Obligato's characteristic darkness. In orchestral playing it blends naturally; in solo passages it provides a resonant, singing quality through the lower positions.
Deep, resonant foundation
The C is broad and resonant. It sustains well and responds evenly to varied bow pressure, giving the lower register a stable foundation for orchestral and chamber work.
Playability
Warm response, consistent projection.
Obligato strings respond well to a range of bowing styles. The synthetic core means pitch settles relatively quickly after installation, and once settled the tone is consistent across long rehearsals. The overall tension profile is moderate, which keeps the left hand comfortable during extended practice.
For orchestral viola players who need to blend warmly into string sections, and for chamber musicians who want a rich, interior sound, Obligato is a dependable choice. The tonal palette favours Romantic and post-Romantic repertoire particularly well.
Technical specifications
Materials and construction.
| A | Synthetic core · Medium tension · 4/4 |
|---|---|
| D | Synthetic core · Medium tension · 4/4 |
| G | Synthetic core · Medium tension · 4/4 |
| C | Synthetic core · Medium tension · 4/4 |
| Size | 4/4 viola |
| Origin | Manufactured by Pirastro, Germany |
Frequently asked
Pirastro Obligato viola strings, in short.
What size viola do these fit?
These strings are sized for 4/4 viola, the standard full-size instrument. If you need strings for a smaller viola (1/2 to 3/4), see the Pirastro Tonica Smaller Size range.
How long do Obligato strings last?
Under regular playing the tone stays consistent for several months. Replace when the sound becomes dull or intonation in the upper positions starts to go false. Wipe rosin off after each session to extend lifespan.
How long do new Obligato strings take to settle?
Allow 24 to 48 hours of normal playing for pitch to stabilise. Retune gently in small increments during the settling period.
Are these strings authentic Pirastro?
Yes. Symphonia stocks Pirastro strings through the official supply chain. If a string is faulty on arrival or fails prematurely under normal use, contact us and we will arrange a remedy in line with the manufacturer's warranty.