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Ernie Ball: String Alloys - Slinky Cobalt on the Cutlass SSSplay button

Ernie Ball: String Alloys - Slinky Cobalt on the Cutlass SSS

Ernie Ball: String Alloys - Slinky Cobalt on the Cutlass HSSplay button

Ernie Ball: String Alloys - Slinky Cobalt on the Cutlass HSS

Ernie Ball

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These revolutionary strings are crafted from Ernie Ball's patented cobalt alloy, a breakthrough in string technology that provides guitarists a dynamic new voice. The cobalt alloy has an unparalleled magnetic relationship with pickups, enabling an extended range, stunning harmonic response, beefy low end, and crisp highs. The P02730 strings also have an unbeatable lifespan, retaining brightness and clarity long after other strings have dulled. Ernie Ball Cobalt strings are a must for any guitarist seeking superior tone and value.

Patented Cobalt Alloy for Powerful Pickup Response

The Ernie Ball cobalt alloy is the most magnetically active string material ever developed. It produces a stronger signal in pickups than any other alloy, enabling an expanded dynamic range, complex overtones, and defined low end. The P02730 7-string set has optimized gauges for balanced tension and tone across the fretboard. The skinny top strings are perfect for intricate solos, while the heavy bottom strings deliver a thick, distorted roar.

Lasts up to 4 Times Longer

Ernie Ball Cobalt strings retain brightness and clarity up to 4 times longer than traditional strings. Their extended lifespan saves time and money, reducing frequent string changes. The P02730 set's longevity also provides consistent tone—no more dull, dead strings after just a few sessions.

Ultra-Smooth and Comfortable

Ernie Ball Cobalt strings have an ultra-smooth surface and flexible core that facilitates speedy slides, wide vibrato, and complex bends. Their silky feel inspires effortless shredding and comfort over long practice hours or performances. The custom light top/heavy bottom gauges of the P02730 set balance this slinky playability with thick, distorted tone.

Premium Quality and Components

Like all Ernie Ball strings, the P02730 Cobalt 7-string set is made in the USA from the highest quality materials and components. Ernie Ball is renowned for producing some of the most trusted and best-selling guitar strings in the world.