Set of S42 Thomastik Spirocore 4/4 size Double Bass strings.

Thomastik Spirocores are the No.1 choice jazz bassists and have been a popular bass string for many years.

They have great sustain and a big sound good for many styles, but remain a jazz favorite. You'll also find them on lots of general use basses, for bluegrass, blues, and other styles where that big sound and sustain are prized. They are certainly also used by many fine arco players!

Thomastik Spirocore S42 Double Bass Strings are the gold standard for jazz and versatile players, delivering a legendary tone with unmatched clarity and sustain. Featuring a flexible multi-wire spiral steel core, these strings offer superior responsiveness, effortless playability, and exceptional tuning stability. Ideal for both pizzicato and arco, their full, balanced sound cuts through any mix, with a growly, powerful bottom end perfect for jazz, bluegrass, and more. S42s are durable, long-lasting, and compatible with magnetic pickups, making them a top choice for professionals.