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Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings  

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1321473138413
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Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings are a new spin on Ernie Ball's best selling set of strings which have been played by the likes of Eric Clapton, John Mayer, Steve Vai and ... Read More

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Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings are a new spin on Ernie Ball's best selling set of strings which have been played by the likes of Eric Clapton, John Mayer, Steve Vai and many more. The Cobalt Series is clearly an improvement on its classic nickel-wound counterpart giving the player increased sustain, clarity and output. In addition, they resist sweat and moisture better and have unmatched flexibility when compared to other nickel wound strings. Cobalt is the most magnetically active string alloy on the planet and attracts the magnets in your pickups more than any other string.

"Ernie Ball Cobalt Strings sound and feel better than anything I've ever played! You have to check these out!" - Slash.
"Cobalt Strings feel incredibly silky under my fingers and deliver more punch, output, and clarity than normal strings!" - John Petrucci.

All Ernie Ball strings are precision manufactured to the highest standards and the most exacting specs to assure consistency, optimum performance and long life. Made in the USA.

Gauges 10-13-17-26-36-46.

Warranty
MANUFACTURER'S WARRANTY
Will replace defective strings.


  • Customer Reviews
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Review Snapshot

by PowerReviews
Ernie Ball2721 Cobalt Regular Slinky Electric Guitar Strings
 
4.2

(based on 26 reviews)

Ratings Distribution

  • 5 Stars

     

    (17)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (3)

  • 2 Stars

     

    (2)

  • 1 Stars

     

    (2)

Most Liked Positive Review

 

I like them, but...

I'll cut to the chase. As compared to the run-of-the-mill nickel strings... THE GOOD 1) Smooth feel 2) Slightly increased output 3) Better definition/clarity (bright, but not tinny/shrill)...Read complete review

I'll cut to the chase. As compared to the run-of-the-mill nickel strings... THE GOOD 1) Smooth feel 2) Slightly increased output 3) Better definition/clarity (bright, but not tinny/shrill) 4) Very good tuning stability - tuned up to pitch quickly and stayed there very consistently THE NOT-SO-GOOD 1) A bit pricey 2) Very small drop in "warmth" - didn't bother me much So I really liked these as compared to nickel strings. However, I use GHS Progressives. Compared to these, the Cobalts have fewer advantages. Tonally, I think they are on the same level. The Cobalts may have a bit more output and smoother feel. The tuning stability might sway me to these. I'll need to see how they hold up over time. Only 1 gig on the Cobalts so far, so I'll need to weigh-in on the longevity at a later date. That will also give me some time to refine my opinion as the strings "season". Definitely worth a try as they do provide non-trivial differences. Everyone has different tastes, so no better way to decide than for yourself!

VS

Most Liked Negative Review

 

not a fan

I play punk rock and hardcore music. I have never used anything but Ernie Ball strings.. for around 15 years. Always stuck to the Regular Slinkys. About a month ago I decided...Read complete review

I play punk rock and hardcore music. I have never used anything but Ernie Ball strings.. for around 15 years. Always stuck to the Regular Slinkys. About a month ago I decided to go out on a limb and try these out. I'm not a snob guitarist that believes in changing his strings every week like some. These do have a sweet spot, and that is after about a week of having them on. They do sound great, no argument there. My issue is how fast they seem to rust and how rough they are for sliding around the fret board. It feels like a year old pair of acoustic guitar strings. If you are a guitarist who slides up and down the frets a lot these are not for you. Quite disappointed, decided to try out the RPS 10's instead. The worst part is that they are too bright when you put them on and then after a week they sound perfect. Even now they still sound amazing but the amount of rust and how quickly it sets in make them virtually unplayable.

Reviewed by 26 customers

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5.0

Great

By Rocknrobn39

from Carlisle, Pa.

About Me Experienced

Pros

  • Consistent
  • Good Tone

Cons

    Best Uses

      Comments about Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings:

      Put these on a Carvin guitar with Eric Johnson pickups about 3 weeks ago. Bright, clean, loud tone. Learned on cheap guitar, have heavy touch. For me Super lights cause tuning problems, Lights don't bend enough. But Cobalt strings in lights have consistent tuning yet bend like super lights. As far was rust, I don't leave my guitars in the rain, nor do I allow the strings to stay dirty. If you change strings based on usage and wipe them down after heavy playing, you should't have a problem, I don't. Plan on using these from now on, on this guitar. Plan on trying them on my Fender, though the tone could be too bright for single coils, will post if thats the case. But humbuckers certainly benefit from the tone.

      Comment on this reviewHelp Icon

       
      5.0

      I would recommend these strings.

      By Bob

      from Norris, SC

      Verified Buyer

      Comments about 2721 Cobalt Regular Slinky Electric Guitar Strings:

      Love these strings. Easy to install, great feel and tone.

      Comment on this reviewHelp Icon

      (0 of 2 customers found this review helpful)

       
      1.0

      SAVE YOUR MONEY!

      By Josiah

      from California

      Site Member

      Comments about Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings:

      Terrible quality! I was very disappointed in these strings. I bought a 9, 10, and 11 gauge; just because of other people raving about it. I'm going back to steel. It was a waste of money! Anyone have a time machine?

      Comment on this reviewHelp Icon

       
      3.0

      not a fan

      By Timothy

      from Lewistown Pa

      Comments about Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings:

      I play punk rock and hardcore music. I have never used anything but Ernie Ball strings.. for around 15 years. Always stuck to the Regular Slinkys. About a month ago I decided to go out on a limb and try these out. I'm not a snob guitarist that believes in changing his strings every week like some. These do have a sweet spot, and that is after about a week of having them on. They do sound great, no argument there. My issue is how fast they seem to rust and how rough they are for sliding around the fret board. It feels like a year old pair of acoustic guitar strings. If you are a guitarist who slides up and down the frets a lot these are not for you. Quite disappointed, decided to try out the RPS 10's instead. The worst part is that they are too bright when you put them on and then after a week they sound perfect. Even now they still sound amazing but the amount of rust and how quickly it sets in make them virtually unplayable.

      Comment on this reviewHelp Icon

      (1 of 1 customers found this review helpful)

       
      3.0

      Careful!

      By DUSTIN

      from YPSI, MICHIGAN

      Comments about Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings:

      Keep and eye on your bridges and tailpieces. These bad boys are not only crisp to the ear but deadly to my hardware. Epiphone Les Pual Traditional with cheap metals are getting pretty ground down. They kick up burs on my E A and D saddles creating a sharp point causing premature breakage. Not to mention the wear on my frets. Ive tried a few things to slow it down but ultimately, I might have to swap my bridge and tailpiece. Tough call because the string do sound amazing, they feel real good, and the bite is just right. So, If you have a good quality guitar, run these. But keep an eye out!

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      5.0

      Killer Strings !

      By Michael Pavlich

      from Oregon Coast

      Comments about Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings:

      I'm really liking these strings, jus put these on and what a big difference !

      Comment on this reviewHelp Icon

      (1 of 1 customers found this review helpful)

       
      5.0

      Very bright tone

      By Patricia Paulson

      from Little Rock, Arkansas

      Comments about Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings:

      The tone produced by these strings is bright and clean. Some people might not like how they sound. You can go to Ernie Ball's website and listen to the sound of their strings, so I suggest doing that before you commit to a pack of these. These are pretty smooth strings but I wouldn't call them "silky smooth."

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      (1 of 1 customers found this review helpful)

       
      5.0

      Finally

      By Brandon McFerrin

      from Charleston, MS

      Comments about Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings:

      After many different types of strings, I have finally found the ones that speak to me. I bought these only because my local store did not have the cleartone strings I normally play. So glad I did. These things feel so good and sound amazing too. These strings bend really easy, so that's a plus! Never thought a string would make such an impact for me, but these are my new favorites.

      Comment on this reviewHelp Icon

      (1 of 1 customers found this review helpful)

       
      5.0

      Best strings I've ever used!

      By DAVID DENNIS

      from Eaton Rapids, MI

      Comments about Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings:

      I've been playing guitar for over 40 years now and for electric guitars these are the best strings I've used. My custom fender telecaster has a SD Pearly gates bridge and a SD 59 PAF neck pickup. These have a low output but sound wonderful together. Put on a set of these and WOW, it came alive. Still beautiful and controllable, wonderful tone but like 6 db of gain or more. It's like putting a preamp in your guitar. My SG didn't see as much gain, but my Les Paul also came alive. Note that all three have mahogany bodies and necks, rosewood fret boards and set necks. The SG definitely has the hottest pickups. SO, I guess, if your pickups are already hot don't expect a lot of improvement.

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      (2 of 2 customers found this review helpful)

       
      5.0

      Good Job Ernie Ball !!!

      By jeffery parker

      from Crawfordsville,Ar

      Comments about Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings:

      These strings play very well and stay in tune,the smoothness and feel and the clarity is crazy.Would say if you haven't tryed them to give them a shot they will not let ya down..

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