Thomastik-Infeld S42 Spirocore Upright Double Bass Strings - 4/4 Medium

Classic Spirocore Power, Sustain and Durability

Thomastik-Infeld Spirocore S42 upright bass strings deliver the powerful, clear and sustaining tone that has made Spirocore one of the most widely recognized double bass string families.

Their flexible spiral steel core and chrome winding produce a focused response with excellent projection, tonal clarity and dependable tuning stability. The medium-tension S42 set provides a firm, controlled feel with enough flexibility for comfortable playing, making it a versatile choice for orchestral, jazz, chamber and amplified performance.

Spirocore strings respond well under the bow while also producing the sustain, definition and punch sought by pizzicato players. Their durable steel-core construction makes them particularly well suited to working bassists, advancing students and professionals who need reliable performance across a wide range of musical settings.

Set Includes

• G – S36: Chrome wound over a spiral steel core
• D – S37: Chrome wound over a spiral steel core
• A – S38: Chrome wound over a spiral steel core
• E – S39: Chrome wound over a spiral steel core

Specifications

• Instrument: Upright Double Bass
• Set Number: S42
• Size: 4/4
• Tension: Medium
• Core: Spiral steel core
• Winding: Chrome
• Vibrating String Length: 41.7–43.3 inches
• Total Set Tension: 130 kg / 286.6 lb
• Made in Vienna, Austria

Please Confirm Your Bass Size

Double bass sizing is not completely standardized. The S42 set is designed for instruments with a vibrating string length between approximately 41.7 and 43.3 inches. Measure from the inside edge of the nut to the top edge of the bridge before ordering.