Ernie Ball 2733 Slinky Cobalt E-Bass Strings, Hybrid 45-105

Ernie Ball 2733 Slinky Cobalt – Hybrid 45-105 E-Bass Strings

The Ernie Ball Slinky Cobalt 2733 is a 4-string electric bass string set engineered for balanced tone and reliable performance across a wide range of playing styles.

• Hybrid 45-105 gauge combination delivers a full, punchy low end with comfortable playability in the upper register
• Cobalt alloy technology enhances magnetic coupling with pickups for increased output and clarity
• 24-month manufacturer warranty provides long-term reliability and peace of mind for gigging and studio musicians
• Lightweight set at 0.112 kg total — easy to stock and swap between sessions

What sets the Slinky Cobalt apart

The hybrid gauge pairing is a deliberate balance: the heavier low strings retain the tight, defined bass response needed for live and recorded low-end, while the lighter high strings reduce finger fatigue during fast passages and extended playing sessions. The cobalt core formulation is designed to maintain string brightness and sustain over time, rather than dulling quickly under heavy use.

Ideal for...

Electric bass players across genres — from rock and metal to funk, pop, and studio recording — who need a versatile set that handles both aggressive riffing and clean melodic lines without switching string sets.

Application of Ernie Ball 2733 Slinky Cobalt

1. Install the strings on a standard 4-string electric bass, tuning to standard E-A-D-G
2. Stretch each string gently after installation to reduce initial tuning instability
3. Replace strings when tone dulls or intonation drifts — the cobalt alloy is designed for consistent performance throughout its lifespan