Spirocore strings have a flexible multiwire spiral rope core. They offer a longer period of musical vibration and significantly reduce inertia. Spirocore strings are equally effective when playing arco or pizzicato. They are highly responsive and long lasting. Spirocore strings, widely recognized as “the reference standard”, are renowned for their distinctive tone and playability.
 
The Larsen A and D strings are wound with precision rolled stainless steel flat wire.The SOLOIST EDITION strings are based on solid steel cores, different in properties and dimensions from their regular counterparts.