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Your cart is empty.Engineered to maximize output and clarity, Ernie Ball Cobalt Slinky guitar strings are one of the latest innovations in string technology. Seeking to provide guitarists and bassists with a new voice, Cobalt strings provide an extended dynamic range, incredible harmonic response, increased low end, and crisp, clear highs. Cobalt provides a stronger magnetic relationship between pickups and strings than any other alloy previously available.
Jake
2025-08-23 11:11:37
Great practice for aspiring metal players. The strings are thick, hard to work with and hurt, but thats what makes it great, its good for aquiring the discipline needed for guitar early on. When you finally drop to standard string gauges you will feel like your playing with spaghetti and tones will be more clear, overall playing will be easier. The perfect bootcamp strings in my opinion.
Azothyran
2025-08-03 18:11:57
I installed these strings onto my ESP guitar as soon as I got them in the mail, and I must say it was worth the wait. The first thing I noticed was the feel. These strings are silky smooth, even the low E string. The second thing I noticed was the durability. As I pulled the string across the fretboard I noticed the reaction these strings have to the magnetic pickups...just like Ernie Ball claims, these strings react STRONGLY to magnets. I had to peel these strings off the pickups a few times while I was installing them. Then I noticed the durability of these strings as I tuned them. I felt a fair bit of resistance, much more than my old strings when I first installed them. They're also a lot more sensitive to tuning adjustments, although after leaving them sit for two hours after JUST BEING INSTALLED, they were only 5 cents off on the tuning. A small twitch of the tuning peg and they were back to where they should be. I figured, like any string, I would be fighting with them for the next few days trying to stretch them enough so they'll stay in tune without constant adjustment, but this is my third day of playing with them and they have stayed in perfect tuning since I installed them. I can't guarantee they will work for you the same way, but I know they will hold up to a lot more abuse than many other strings I've used so far. The final thing I noticed was the TONE. These strings sound quite a bit different, they have a much tighter mid to high and they seem to have less of a tendency to chaotically overlap each other's sound. Each string has a distinctive tonality that sets them apart from each other. You play the same note on different strings and you can easily hear the difference between the two. Sustains seem to last forever, and the clarity is incredible...only problem I'm having is trying to explain how it sounds in words...if you decide to buy them, try them with distortion and without, you'll be impressed by their versatility.To summarize,-Strong reaction to the magnets in pickups-Stay in tune very well (for me at least)-Sharp, clear tone-Each string is distinguishable from another-Durable-Silky smoothIf you have any questions, shoot a comment if you want, but I am telling you, I would not hesitate to try these strings at least once.
jason
2025-07-29 11:01:26
I usually use Super Slinky so if your like me and wanted to try these, here is a comparison from my opinion.1. These feel more "stringy" like looser and more wirey to play, the Super Slinky felt more thick and heavier.2: Cobalt is much brighter so if you play a more acoustic type style you will notice a pretty big difference. almost has a small sitar type of reverberation.3: Cobalt seemed to pick up a bit stronger on my pickups, sounded great with heavy distortion. With the extra brightness you could really make each string shine, just seemed to be lacking in the lower tones I needed and felt stringy. Super's provided a lower tone as well as the extra firmness I needed when playing.Overall I had to go back to super slinky, but may slap them on an extra rig for some distorted fuzz fun.
Matt Moskowitz
2025-07-28 11:08:26
These strings REALLY rock out!!! You get some great growl out of them, they are flexible and they just sound like they sparkle! The heavier gauge is what I was looking for and the Cobalt give them a lot of bite! They sound warm with a lot of high end and deep bass. Very easily broken in. Great strings in my opinion for the money, I’d buy them even if they were double the price.
Customer
2025-07-27 16:57:10
I love the bright jangly tone these strings produce, even on my Epiphone Les Paul humbuckers they really sound awesome! They feel light and are easy on the fingers. I haven't had any issues keeping them in tune either.They do get dull rather quickly compared to the standard Ernie Ball strings. I can get a little more than a month out of them before they start to sound muddy with around 1 hour of daily practice. If I had another guitar I would totally keep it set up with these strings, but they just don't sound good for long enough to use exclusively. Definitely worth a shot if you're looking for a brighter tone.
sha4rkbyt31
2025-07-19 15:58:09
I bought these for my Schecter SVSS Green Reign which uses the Sustaniac pickup in the neck. These reacted a lot better than your standard nickel coated strings and sound warmer as well with very good mid-range!!! They're a bit easier to keep clean initially also and wipe down easier. The Cobalt coating also feels better on my fingers. I've tried other Teflon coated strings and don't like them as it actually does deaden the sound. Sure they last longer because they're easier to keep clean but I've had too many sets that leave ePTFE dust in your pickup cavity pockets AND the most popular brand? Your getting GHS Boomers at an inflated price with Teflon coating. $6.95 string set with Teflon is now $15.95 each if purchased in bulk. I worked for the company that produces these for 17 years. You're being scammed!
J. Botta
2025-07-11 13:24:52
Strung these up on my Schecter Devil Tribal in drop C and as always Ernie Ball strings do not disappoint. Bright clear sound whether playing clean or distorted.
Keith
2025-06-25 17:53:00
I had bad luck with string breakage on some of the first runs of these. I'm glad I gave them another try after some time. No more breakages and the sound is amazing. A little extra grit and output at the same gain level and very harmonic (some may not like that I guess as it does accentuate pick chirp a bit). The feel is a bit different, but I love them. I hope they make them forever.
Customer
2025-05-12 18:39:38
I’ve not tried this particular one before, usually opting for the Ernie ball 9’s ( pink pack) but I wanted to try the 8’s , they are pretty good to be fair , not broken one ( yet , and I do tend to dig in a bit) stay in tune very well, ( after a good stretch) good sound and a decent price, will buy again, not had them long enough to rust yet, but I play every day so that’ll keep it down
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2025-04-21 12:24:06
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Gordana Dennis
2025-04-13 10:20:42
Ottime corde un pochino ruvide ma per me che faccio accompagnamento sono ottime . Resistenti scorrevoli e ti danno la padronanza di ciò che hai fra le dita.
garip yoruk
2025-03-07 21:33:11
Yaklaşık 3-4 haftada paslandı uzun ömürlü değil
Customer
2025-02-04 10:08:01
They are actually really great strings. I really didn't notice much difference "tonewise" compared to the regular Super Slinky Ernie Ball strings that I use. I just thought I'd give them a go. Maybe they are a little more slick and bend a little smoother?? That may have been a placebo effect to justify paying the extra for these strings though haha...Overall I'll just go back to the Super Slinkys.Ernie ball are the only strings I'll use though.
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