Detail 01
Power Slinky gauge
Heavier than a regular Slinky set. More tension means more effort per bend and a firmer pick attack.
Product detailSKU #1321473138357
Ernie Ball2720 Cobalt Power Slinky Electric Guitar Strings
1/2
Independent shopping perspective
The Korena take
Cobalt electric set in a medium-heavy gauge. A step up in tension from standard Slinkys for players who want more grip under the fingers.
Strong match
Who this is for
- Half-step-down or D standard tuning at full tension
- Rhythm players wanting a thicker, more solid attack
- Anyone who breaks light strings regularly
Consider the trade-offs
When to look elsewhere
- Fast lead players who bend a lot
- Vintage-style necks not set up for extra tension
- Beginners still building finger strength
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
Cobalt alloy wrap
Stronger magnetic response than nickel-plated steel. Output goes up and the upper mids come forward.
Detail 03
Electric guitar construction
Built for magnetic pickups. Not a substitute for acoustic strings, which use a different wrap alloy.
Detail 04
Round wound
Textured surface gives brightness and bite, along with the usual finger-squeak when sliding position.
Final check
Know before you order
- 01Changing gauge shifts neck relief — check intonation after the first stretch
- 02One set, six strings, no accessories
- 03Cobalt tarnishes with sweaty hands; wipe down after playing
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01How do these compare to regular Slinky strings?
Same construction, heavier gauges. The cobalt wrap adds output and midrange presence over the standard nickel-plated version.
02Do I need to adjust my guitar?
If you're moving up from a lighter set, yes. Higher tension pulls more neck relief and changes intonation slightly.
03Will these work on a bass or acoustic?
No. These are electric guitar strings sized for six-string electric scale lengths and magnetic pickups.
04How long do cobalt strings last?
Similar to other uncoated sets. Sweat and skin oils are the limiting factor, so wiping them down after each session extends life the most.
