Detail 01
Cobalt alloy
Stronger magnetic pull on pickups than nickel-plated steel. Higher output, brighter highs, more pronounced mids.
Product detailSKU #1321473138378
Ernie Ball2723 Cobalt Super Slinky Electric Guitar Strings
1/2
Independent shopping perspective
The Korena take
Cobalt-alloy electric guitar strings in the lightest common Slinky gauge. For players who bend a lot and want more output than nickel-plated steel.
Strong match
Who this is for
- Heavy string bending and vibrato-driven lead playing
- Getting more pickup output without changing gear
- Bright, cutting rhythm tone in a dense mix
Consider the trade-offs
When to look elsewhere
- Down-tuned playing — light gauge goes floppy
- Players wanting warm, rolled-off vintage tone
- Acoustic or classical guitars
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Super Slinky gauge
The lightest of the standard Slinky range. Easiest bends, lowest tension, most prone to going sharp under a heavy hand.
Detail 03
Roundwound construction
Textured wound strings give finger squeak and bite. Grippier under the fingers than flatwounds.
Detail 04
Electric-only design
Steel core relies on magnetic pickups. Won't drive an acoustic top properly.
Final check
Know before you order
- 01Lighter gauge changes neck relief — a truss rod tweak may be needed
- 02Cobalt is noticeably brighter; you may re-dial your amp
- 03Floating tremolo bridges need re-balancing when changing gauge
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What gauge is Super Slinky?
It is the lightest of Ernie Ball's standard Slinky range — built for low tension and easy bending rather than heavy strumming or low tunings.
02Is cobalt better than nickel?
Different, not better. Cobalt pushes more signal into the pickup with a brighter, more aggressive voice. Nickel is warmer and smoother.
03Can I use these on an acoustic guitar?
No. These are magnetic-pickup strings. An acoustic needs bronze or phosphor bronze windings to sound right.
04Will light strings buzz on my guitar?
Possibly. Dropping to a lighter gauge reduces tension and pulls the neck straighter, which can lower action into the frets. Check relief after installing.
