Jargar has been making strings for orchestral instruments by hand in Copenhagen, Denmark, since 1956. These strings share their general construction (steel rope core) with Corelli 370's, but they have a very different vibe, thanks to some additional dampening materials. They are hand-wound with thin threads of metal - "aluminum, copper and different alloys," according to the manufacturer.
What you get is a steel string with a softer, easier feel - and a surprisingly non-metallic-sound. They have sort of a "gut-like" top end, with their shorter sustain, thuddier attack, and warm tone. They're also good under the bow; relatively easy to bow without scratchiness, and a big, dark arco sound. Lots of body, less definition. But this may be a good thing, depending on your needs. They have a nice "body," and are easy on the hands.
These strings have been reported as a favorite by everyone from orchestral bassists to rockabilly players; their soft feel and darker, gut-like vibe (but durable steel construction) can actually make them a good choice for slappers who aren't getting what they're looking for from gut or synthetic strings.
Rockabilly players often choose the Dolce (light) model for their lighter tension, which makes them more slap-friendly.
String gauges (mediums):
- G: .051/1.31mm
- D: .064/1.64mm
- A: .079/2.02mm
- E: .109/2.79mm
Note that the Forte strings are a little thicker, and the Dolce strings are a little thinner, than the medium strings.
- Forte: Red colored winding at ball end, blue colored winding at pegbox end
- Medium: Blue colored windings at both ends
- Dolce: Green colored windings at both ends