Sommer Cable SC-Onyx 0.25mm² Balanced Audio Cable 1m – Ultra-Low Capacitance OFC Patch Cable

With a conductor-to-conductor capacitance of just 60 pF/m, the SC-Onyx 0.25mm² preserves every transient and harmonic detail, making it the go-to patch cable for transparent signal transfer in studio and stage environments.

Overview

The Sommer Cable SC-Onyx 0.25mm² is a premium balanced audio cable engineered for professional applications where signal integrity is paramount. Its dual oxygen-free copper conductors, each with a cross-section of 0.25 mm² (AWG 23), ensure exceptionally low resistance and high conductivity. The spiral copper shield provides effective rejection of electromagnetic interference, while the flexible PVC jacket allows easy routing in tight spaces. At 1 metre in length, this patch cable is ideal for connecting outboard gear, patchbays, microphones, and instruments without introducing noise or coloration.

What stands out

• Ultra-low capacitance: 60 pF/m (conductor-to-conductor) and 110 pF/m (conductor-to-shield) for pristine high-frequency response.
• Oxygen-free copper (OFC) conductors with 32 strands of 0.10 mm each for maximum flexibility and durability.
• Spiral copper shield with resistance below 30 Ohm/km for reliable noise rejection.
• Compact 4.6 mm outer diameter and highly flexible PVC jacket for easy installation in crowded racks.
• Wide operating temperature range from -20°C to +70°C for use in demanding environments.

Technical details

• Cable type: Balanced audio cable
• Conductor configuration: 2 conductors + shield
• Conductor cross-section: 2x 0.25 mm² (AWG 23)
• Conductor material: Oxygen-free copper (OFC)
• Shielding: Spiral copper shield
• Outer diameter: 4.6 mm
• Jacket material: PVC, black
• Capacitance (cond/cond): 60 pF/m
• Capacitance (cond/shield): 110 pF/m
• Conductor resistance: < 78 Ohm/km
• Shield resistance: < 30 Ohm/km
• Insulation: PE (polyethylene)
• Voltage rating: 50 V
• Length: 1 m

Our verdict

The SC-Onyx 0.25mm² combines Sommer Cable's renowned build quality with exceptional electrical characteristics. Its low capacitance and OFC conductors make it a transparent link in any audio chain, while the rugged yet flexible design ensures long-term reliability. For professionals who demand accuracy without compromise, this cable is a solid investment.