Stringjoy Signatures 45-105 Extra Long scale Nickel Wound round core Light Top Heavy bottom bass string set. This Light Top Heavy Bottom set is the best of both worlds when it comes to bass guitar strings. The top ones will give you snappiness reminiscent of Indiana Jones’ whip, while the low strings will give you enough power to name your amp “The Temple of Boom” thanks to the hexagonal core-wire that Stringjoy use in all of bass strings.