Pricing and availability

We compare 600+ stores and found this item at 6 stores. Prices updated .

Sweetwater
5.0 (2)
$14.99
Guitar Center
5.0 (1)
$14.99
Amazon
4.8 (1871)
$14.99
Reverb
5.0 (1)
$12.99 New
$12.89 Used
Musician's Friend
4.0 (4)
$14.99
zZounds
2.5 (1)
$14.99

Price History

Based on price data from 4 merchants for "Ernie Ball Power Slinky 7-String Cobalt Guitar Strings (11-58)". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Unlock a new realm of sonic possibilities with the Ernie Ball Power Slinky 7-String Cobalt Guitar Strings (11-58). Crafted to push the boundaries of traditional string technology, these strings are a game-changer for guitarists seeking unparalleled clarity and output. The cobalt alloy used in these strings offers a superior magnetic interaction with pickups, resulting in a dynamic range that's both extended and articulate. Feel the silky texture beneath your fingers, making bends smoother and fast passages effortless.

These strings are not just about feel; the sound is where they truly shine. With rich lows, a focused midrange, and shimmering highs, every note is delivered with precision and depth. The harmonic response is nothing short of remarkable, allowing your tone to cut through any mix with ease. Moreover, the cobalt composition ensures a longer lifespan, maintaining their vibrant sound even after prolonged use.

Whether you're a touring musician or a bedroom shredder, the Ernie Ball Cobalt 7-String set is designed to elevate your playing experience. Experience the difference that has captivated the pros, and let your guitar roar like never before.

Key Features:

  • 7-string set designed for enhanced performance
  • Cobalt alloy offers superior pickup interaction for increased output
  • Silky, smooth feel for effortless playability
  • Rich lows, focused midrange, and clear highs
  • Increased harmonic response and sustain
  • Longer lifespan compared to traditional strings
  • Gauges: .011, .014, .018, .028, .038, .048, .058
  • Made in the USA

Product specs

Guitar Type 7-string Electric Guitar
Number of Strings 7
Coated No
Gauges .011, .014, .018p, .028, .038, .048, .058
Core Material Steel
Winding Material Iron/cobalt alloy
Winding Type Round Wound

FAQs

What are the tonal characteristics of Ernie Ball Power Slinky 7-String Cobalt Guitar Strings?

These strings offer a powerful and robust tone, particularly suited for rock and blues genres. The cobalt material enhances output and clarity, providing a dynamic and responsive playing experience.

Are Ernie Ball Power Slinky 7-String Cobalt Guitar Strings suitable for drop tunings?

Yes, the 11-58 gauge range provides sufficient tension for drop tunings, making them ideal for genres that require lower tunings, such as metal and hard rock.

How do Ernie Ball Cobalt strings differ from regular nickel-wound strings?

Cobalt strings provide a stronger magnetic relationship with pickups, resulting in increased output and clarity. They also offer enhanced sustain and a more responsive feel compared to traditional nickel-wound strings.

Do these strings work well for both rhythm and lead playing?

Yes, the balanced gauge of Ernie Ball Power Slinky 7-String Cobalt Guitar Strings provides the versatility needed for both rhythm and lead playing, offering thick, powerful chords and clear, articulate solos.

Are Ernie Ball Power Slinky 7-String Cobalt Guitar Strings durable?

While not coated, these strings are known for their durability and longevity due to the strong cobalt alloy, which resists corrosion and wear better than some other materials.

Reviews

PROS

  • Exceptional tone clarity and punchiness, especially on lower strings

  • Enhanced sustain and resonance, particularly beneficial for fast lead runs

  • Longer lasting freshness compared to regular steel or nickel strings

  • Unique Cobalt material offers a controlled, quiet sound

  • Versatile performance across various genres, especially metal and hard rock

  • Maintains tuning stability well after initial break-in period

  • Ideal fit for 7-string guitars with accurate pitch stability

  • Improved overall output, could negate the need for new pickups

  • Clear and vibrant sound makes a noticeable difference on 7-string guitars

  • Balanced gauge for tightness and playability in drop tunings

CONS

  • Initial rough feel on fingers may require an adjustment period

  • Prone to faster grime buildup and discoloration, affecting tone quality

  • Some users experience frequent string breakage, affecting reliability

  • Metallic feedback issues reported in specific playing scenarios

  • Strings may feel slightly loose due to thinner core wire design

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Ernie Ball Power Slinky 7-String Cobalt Guitar Strings (11-58).

Setup and maintenance

  • Users report needing to adjust the truss rod and action for thicker strings; standard size sets are often sufficient for low tunings.

    Source
  • To achieve G tuning on a 25.5" scale guitar, some replace the 62 with a 74 from an 8-string set for better tension.

    Source

User experience

  • Some owners find Ernie Ball Slinky strings degrade quickly, with the high E string breaking within a week.

    Source
  • Users find that longer scale lengths require lighter string gauges to maintain ideal tension and feel.

    Source
  • Owners using Ernie Ball Power Slinky Cobalt 11-58 on 7-string guitars often omit the high E string for drop D and C tunings, mainly playing in drop C.

    Source
  • Multiple users compare Ernie Ball Slinky strings to D'Addario, noting Ernie Ball has a more comfortable feel, while D'Addario lasts longer but feels stiffer.

    Source

Use cases and applications

  • Ernie Ball Cobalt strings are noted for feeling almost like flatwound strings, which some players prefer for smoother playability and reduced finger noise.

    Source

5.0 out of 5

Based on 0 Reviews and 1 Rating

5 star
4 star
3 star
2 star
1 star

More Ernie Ball Strings

Accessories & Related Items

Artist usage

Community setups

Similar

Gear Guides