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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

collapse expand iconDescription

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.

Ernie Ball P02730 Cobalt 7-String Skinny Top Heavy Bottom Electric Guitar Strings 10-62
Ernie Ball P02730 Cobalt 7-String Skinny Top Heavy Bottom Electric Guitar Strings 10-62

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collapse expand iconReviews

4.38

8 Reviews

86%

of respondents would recommend this to a friend

Filters
Best Uses
  1. Practicing3
  2. Concerts2
Cons
  1. Breaks Easy1
  2. High strings aren't as slinky as I would like1
Describe Yourself
  1. Experienced4
  2. Professional Musician3
Pros
  1. Good Tone5
  2. Well Built / Quality3
  3. Consistent2
  4. Long Life2
  5. Aggressive Tone1
  • Best sounding 7 string pack I've tried

    5

    Verified BuyerVerified Buyer

    submitted2 months ago

    byEtha n

    fromPalm beach gardens

    Submitted as part of a sweepstakes

    The cobalts help clear the mudiness of your typical 7 string. Very big fan. I use them on my Ernie Ball Kaizen 7 and they're great.

  • Surprised.

    5

    Verified BuyerVerified Buyer

    submitteda year ago

    byJames

    fromFort Pierce, Florida

    Submitted as part of a sweepstakes

    Surprised by the difference in sound with the cobalt strings vs. regular. Noticable.

  • These are my go to strings for my 7 string for drop g tuning

    5

    Verified BuyerVerified Buyer

    submitted2 years ago

    byStorm

    fromDanville Ky

    Submitted as part of a sweepstakes

    The heavier gauge on the low strings help keep things tight in drop g tuning which is fantastic, the only downside is that the high strings aren't quite as slinky as I would want but these are the best i can find without doing custom order sets. Tones is out of this world aggressive too

  • Best in class

    5

    Verified BuyerVerified Buyer

    submitted2 years ago

    byVictor

    fromAustin, Texas

    Submitted as part of a sweepstakes

    Reliable, durable, great stability, stainless for almost 3 months, overall great set of strings made with high quality

  • Crappy strings

    1

    submitted2 years ago

    byDavid

    fromHouston texas

    Bought a 7 string set to try im a daddario guy just wanted to try them put them on my custom shop jackson practice a couple of practices on them to stretch them had a show the next weekend barely made have way through the first song and broke e string i have broken a string in years during a show, over priced and not good quality ill stay with daddarios thank you

  • Material to Palm Mute heavy riffs!

    5

    submitted6 years ago

    byArash

    fromLos Angeles

    Material to Palm Mute heavy riffs!

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