RS66LA Rotosound Swing Bass 66 string set electric bass stainless steel 30-85

I tried everybody’s strings but the E and the A’s just didn’t work. After a couple of hours, we realised that the problem wasn’t in the wire winding, but in the core of the string. Those strings, the RS 66 sets, were the first that vibrated properly other than the Danelectros.”.

eBay