Ernie Ball Super Slinky Cobalt Bass Strings (45-100)

4.5 (11)

$39.99

4.5 (254)

$34.75

5.0 (2)

$30.10 38 available New

$39.99 1 available Used

3.0 (9)

$39.99

$39.99

£28.50

Price History

Based on price data from 3 merchants for "Ernie Ball Super Slinky Cobalt Bass Strings (45-100)". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Elevate your bass playing experience with the Ernie Ball Super Slinky Cobalt Bass Strings. Designed for those who seek both clarity and punch in their performance, these strings combine the Super Slinky gauge with a revolutionary cobalt coating. This innovative blend ensures your bass sounds hot and clear, responding to every nuance of your playing. Whether you're laying down grooves in the studio or bringing the low end on stage, these strings offer the dynamic range your music demands.

Key Features:

Super Slinky gauge for a comfortable playing feel
Revolutionary cobalt coating for enhanced output and clarity
Gauges: 45-65-80-100 for versatile playability across genres
Designed to maximize the response from pickups

Product specs

Guitar Type	Electric Bass
Number of Strings	4
Coated	No
Gauges	.045, .065, .080, .100
Winding Type	Round Wound
Core Material	Steel
Winding Material	Iron/Cobalt Alloy
Scale Length	Long

FAQs

What makes Ernie Ball Super Slinky Cobalt Bass Strings different from regular nickel or steel strings?: Ernie Ball Super Slinky Cobalt Bass Strings use a cobalt alloy, which provides a stronger magnetic relationship with pickups, resulting in enhanced output, clarity, and a broader dynamic range compared to traditional nickel or steel strings.
Are Ernie Ball Super Slinky Cobalt Bass Strings suitable for slap bass techniques?: Yes, the Super Slinky Cobalt Bass Strings are well-suited for slap bass due to their bright tone and responsive feel, which help articulate the percussive elements of slap playing.
How do the gauges of Ernie Ball Super Slinky Cobalt Bass Strings affect playability?: The gauges (.045, .065, .080, .100) offer a balanced tension that provides easy playability and flexibility, making them ideal for a wide range of playing styles while maintaining a comfortable feel for both fretting and plucking.
Do Ernie Ball Super Slinky Cobalt Bass Strings have a long lifespan?: While they are not coated, the cobalt alloy used in these strings offers improved durability and corrosion resistance compared to standard strings, helping them maintain their tone and feel over extended use.
Are these strings compatible with all electric bass guitars?: Ernie Ball Super Slinky Cobalt Bass Strings are designed for long-scale electric bass guitars, which covers most standard models. Always check your bass's scale length to ensure compatibility.

Videos

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Pepo Vidal

Ernie Ball 2734 Slinky COBALT (45/100) 🔥VS🔥 d'Addario NYXL (45/105)

Pepo Vidal

Rotosound RS66LC (40/95)🔥VS🔥 Ernie Ball Slinky COBALT (45/100)

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Reviews

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PROS

Exceptional midrange growl, perfect for rock, alternative, and metal genres
Remarkably long-lasting tone and sustain compared to many other strings
Significantly louder and brighter than standard strings
Retains clarity and power after multiple uses
Holds tune well even after extended periods
Durable even with aggressive playing styles
Suitable for both headless and traditional bass systems
Maintains quality sound even after several months of use
Full, loud B string and singing highs on D/G strings

CONS

Prone to rust more quickly than some other string brands
Rougher texture compared to smoother strings like D'Addario
Higher price point than other string options
Occasional issues with string breakage, possibly due to defects

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Ernie Ball Super Slinky Cobalt Bass Strings (45-100).

User experience

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Players with hot passive pickups and active preamps report a smooth feel with cobalts, describing the windings as between round and half round.
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Some players emphasize the strings' ability to enhance tonal variety with higher-powered pickups, noting improved vibration transfer and midrange presence.
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A player has maintained crisp sound with zero corrosion on their cobalts for over six months, indicating potential longevity depending on playing conditions.
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0 0

On short scale basses, cobalt flats enhance articulation more than most flats, providing a brighter sound with a flat wound feel.
Source
0 0

Cobalt rounds are noted for greater tension compared to GHS Bass Boomers and Rotosound rounds, impacting playability for those preferring lower tension strings.
Source

Setup and maintenance

0 0

Cobalts are reported to corrode quickly, especially for players with sweaty hands, often becoming unusable in 1-2 months.
Source
0 0

Users report rust on cobalt rounds immediately out of the package, and corrosion buildup on frets can occur within 4-5 weeks, even with regular cleaning.
Source

Comparisons

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Users who prefer DR Sunbeams or Sadowsky Blue Labels find cobalts lack the desired low tension and lighter feel.
Source
0 0

Cobalt rounds are said to be coarser to the touch, similar to stainless steel rounds, rather than the smoother feel of nickel rounds.
Source

Use cases and applications

0 0

Cobalt flats offer a hybrid tone with low-end "slam" and a grindy treble, ideal for players who want both thump and clarity.
Source

Features and functionality

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Cobalt flats maintain brightness even after breaking in, offering a mix of highs and flat wound feel, suitable for both passive and active basses.
Source

Build quality

0 0

Some users experienced premature string breakage with cobalt rounds due to corrosion within the core wire, suggesting potential issues with longevity.
Source

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5.0 out of 5

Based on 0 Reviews and 5 Ratings

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Artist usage

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Chris Barker

Bassist

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Verified via Ernie Ball Blog

Chris uses these strings according to the Ernie Ball site.

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

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