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Ernie Ball 2721 Cobalt Regular Slinky Electric Guitar Strings  

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#H79095000000000
  • MSRP:
    $17.00
  • Your Savings:
    - $7.01
  • Your Price:
    $999

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See All Ernie Ball .010 Gauge Electric Guitar Strings
Ernie Ball

Play like a pro with these revamped classics.

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.

"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.

Features

Start hearing and feeling the Cobalt difference today. Order now!

 
Customer Reviews
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Review Snapshot®

by PowerReviews
Ernie Ball2721 Cobalt Regular Slinky Electric Guitar Strings
 
4.2

(based on 46 reviews)

Ratings Distribution

  • 5 Stars

     

    (25)

  • 4 Stars

     

    (8)

  • 3 Stars

     

    (10)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (2)

72%

of respondents would recommend this to a friend.

Pros

  • Good tone (27)
  • Consistent (17)
  • Well built / quality (17)
  • Long life (16)

Cons

  • Poor tone quality (3)

Best Uses

  • Concerts (13)
  • Practicing (12)
  • Back-up (9)
    • Reviewer Profile:
    • Experienced (21), Professional musician (12)

Most Liked Positive Review

 

creamy smooth overdrive on a thin gauge

I was disappointed when I went to my local shop and all they had were sets of 9's. I haven't played on anything less than 12's since I first picked up the...Read complete review

I was disappointed when I went to my local shop and all they had were sets of 9's. I haven't played on anything less than 12's since I first picked up the guitar. Imagine my surprise when I got them on and it sounded like I had 14's on, yes they sounded that fat. After playing 12's for the past 3 decades my fingers were flying up and down the fret board like lightning posessed. Light, fast & they sound like they're fat enough to hang a truck on without breaking. I play a U.S. Telecaster through a Fender Blues Deville with 4x10's that is so clean that I have to be up around ear bleed volume to get even the slightest overdrive. These strings deliver something I thought I'd never accomplish without a series of OD pedals. Thanks Ernie Ball. What I will save in not having to keep buying OD pedals should set me up with enough strings to last the rest of my life.

VS

Most Liked Negative Review

 

Can be great or not so great..

I strung up my 62 jazzmaster with these having rather high hopes. I strummed a chord and was immediately deflated. After I put these on, the rich creamy jazzmaster tones I've grown to...Read complete review

I strung up my 62 jazzmaster with these having rather high hopes. I strummed a chord and was immediately deflated. After I put these on, the rich creamy jazzmaster tones I've grown to know and love were completely unattainable. Just bright and punchy and punchier and brighter. Some players might dig that with their jazzmaster but not me.I went running back to elixer wondering how i could have ever betrayed them.

But I wasn't ready to give up on these strings yet so I tried a set on my ej strat. Completely different reaction! The tone, clarity and depth were great. Not sure they were better or worse than elixers, but they sounded good so I didn't overthink it.

As far as feel goes they're pretty nice. For me though nothing slides and feels quite as nice as elixers. My hands sweat quite a bit when I play too so coated strings are always a plus.

All in all I think it depends what you want out of your guitar and what guitar you throw these on. Great in some instances and highly disappointing in others. I don't see a need to purchase them again and I certainly have'nt been "converted". Sticking with elixers for now.

Cheers.

Reviewed by 46 customers

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Displaying reviews 1-10

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5.0

I uses these strings a lot now

By Brad

from Boston, MA

About Me Experienced

Pros

  • Good Output
  • Good Tone

Cons

    Best Uses

    • Anytime

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

    These strings are great. I think the clear tone and increased output is what attracts me. I have not had problems with the strings breaking, like other people have commented. I don't do a lot of bending, just a little.

    While they do cost more, it is worth it to get one set and put it on your favorite guitar. Then you can form your own opinion.

    Comment on this review

    (1 of 1 customers found this review helpful)

     
    5.0

    Hookeed on cobalt

    By Kyle No

    from The Bronx

    About Me Professional Musician

    Ask me a question

    Verified Buyer

    Pros

    • Consistent
    • Good Tone
    • Long Life
    • Strong

    Cons

      Best Uses

      • Backup
      • Concerts
      • Practicing

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

      Ever since I strung these on my guitar I was sure I'd be using these again- I was right. I'm not saying these strings are better than every string out there, but these are what I'm going to use.

      Comment on this review

      (1 of 1 customers found this review helpful)

       
      5.0

      Best Slicing Bite

      By BigJim

      from Sanford, Fl

      About Me Experienced

      Verified Buyer

      Pros

      • Best Crunch Ever
      • Good Tone
      • Long Life
      • Strong

      Cons

      • No cons

      Best Uses

      • Everything

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

      Powerfull bite to cut through when you want it to

      Comment on this review

      (1 of 1 customers found this review helpful)

       
      5.0

      These Work

      By Ike

      from Denver

      About Me Professional Musician

      Verified Buyer

      Pros

      • Consistent
      • Good Tone

      Cons

      • Expensive

      Best Uses

      • Concerts

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

      I use these on a few guitars with overwound pickups to pull down the middle and extend the highs and lows just a little. Very smooth and musical, not as harsh as stainless steel. I use the EB 2221 on most of my electrics, and the EB 2251 on maple neck Teles and Strats.

      Comment on this review

      (1 of 1 customers found this review helpful)

       
      5.0

      I love these strings.

      Pros

      • Great Tone
      • Long Life
      • Strong

      Cons

        Best Uses

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

          Best strings I have found to date, bar none!

          Comment on this review

          (3 of 3 customers found this review helpful)

           
          5.0

          I probably won't switch brands again

          By nhunter333

          from Live Oak, Fl

          About Me Professional Musician

          Ask me a question

          Verified Buyer

          Pros

          • Consistent
          • Good Tone
          • Long Life
          • Strong

          Cons

          • A Little Pricey

          Best Uses

          • Backup
          • Concerts
          • Everything
          • Practicing

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

          I have never used regular Ernie Ball slinkys so I cannot compare the two....With that being said, on to my review!
          I tried these when they came out after using Elixer Nanowebs for years. The Cobalt EB's sound better to me and strength wise are just as durable. And they don't get "fuzzy" from a coating coming off that you don't need any way.
          I practice 2 to 3 nights per week, and we play 4 to 6 shows per month (4 hours a night). I sometimes keep my axes in a case, and sometimes they may hang on a stand for a week. They don't rust and sound great..... I know I should change more often, but, I generally only change strings once a month.
          They stretch out and break in quick, (like right before a show LOL), stay in tune, and, in the 2 years I've been using them I have not broken one
          yet.
          I play a Fender Strat, and a Jackson dinky with a Floyd Rose.

          Comment on this review

          (2 of 3 customers found this review helpful)

           
          3.0

          Very different strings

          By Letitrok

          from Toronto, Ontario, Canada

          About Me Experienced

          Pros

          • Consistent
          • Good Tone
          • Strong

          Cons

          • Hard On Fingers And Frets

          Best Uses

          • Concerts
          • Practicing

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

          I've been a D'Addario user for the last 10 years; however, I was curious about the new Cobalt strings introduced by EB, because no other string manufacture ever marketed strings made from this metal. When these new EB Cobalt strings were placed on my Fender Highway 1 HSS Strat, I noticed the guitar had much greater dynamics, volume, sustain and tone compared to the regular D'Addario 10-46 used in the past. Even when strumming the electric unplugged, you can definitely feel the energy of the sustain, and hear the dynamics of the individual notes clearly. These traits were also experienced with the guitar being amplified clean and dirty. Because of the strings clearity, you will hear all the nuiances of your playing. So if you play sloppily now, you hear that with these strings. But over time, your playing can become much more precise. As for feel, there seemed to be more drag when sliding. It wasn't as smooth as the D'Addarios. After 3 hours of playing, my fingertips were more chewed-up than playing with the DA's made from nickle. With that said, I also noticed that my guitar frets started to wear down quicker over the last year. Perhaps Cobalt is a harder element than Nickle??? As far as durabily is concerned... the plain strings started to tarnish after about 2 weeks, but tuning, tone, sustain, dynamics and volume were maintained. After about a year, I switched back to DA's because of the fret wear and draggy feel. I will try these on my guitars with stainless steel frets, but will not put them on my regular nickle alloy fretted guitars.

          If EB can make these strings with less drag on my fingers, less wear on my frets and ant-tarnish, then that would more justify the price. Till then... I'm going back to D'Addarios.

          Comment on this review

          (0 of 4 customers found this review helpful)

           
          3.0

          Just a Gimmick

          By bbgamer884

          from New England

          About Me Experienced

          Pros

          • Good Tone

          Cons

          • Not Long Lasting

          Best Uses

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

            I bought these strings for my guitar because the sound was too muddy, but these strings only lasted me 2 weeks with an hour a day of playing. the normal strings last a lot longer. The original strings are much cheaper and the sound lasts longer. This is just a gimmick to get money and I would not like to change again.

            Comment on this review

             
            5.0

            My New Go TO string

            By Gonzo Joe

            from 60554

            About Me Experienced

            Ask me a question

            Pros

            • Consistent
            • Good Tone

            Cons

            • Pricey

            Best Uses

            • Excellent In All Uses

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

            My Strat HSS [American Made] had lousy tone in the single coil bridge pup. Muddy. Almost sounded like an acoustic guitar. With Slinky Cobalts .10 not only did that pup sound like an electric guitar now, but overall tone for me is sharper and Cleaner. I get better sustain. Just wish they weren't almost twice the price.

            Comment on this review

            (2 of 2 customers found this review helpful)

             
            4.0

            Ernie Ball Regular Cobalt Slinky Electri

            By Jake Hueller

            from Lyons, OR

            About Me Experienced

            Ask me a question

            Pros

            • Good Tone
            • Long Life
            • Strong

            Cons

            • Not Consistent

            Best Uses

            • Backup
            • Concerts
            • Practicing

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

            I have used standard 10-gauge Slinkys ever since I first used an electric guitar. When I heard the comments on these things from Steve Vai, Steve Morse, Paul Gilbert, Slash, Steve Lukather, and of course, John Petrucci, I new I had to get some.
            First off, the tone. Breathtaking! Clear, shimmery tone, and very clean and open sounds that ring forever. Sustain is great, and it does not go away easily.
            Secondly, the feel. Honestly, the feel is pretty different. The winds are a little bit wider apart then standard strings, and this does make them a little more grimy feeling. There is more of a scratch when you slide up a not. That being said, these strings can last forever, and they actually do feel very good. The thing is, they feel very nice and silky most of the time. Recently, the packs I have gotten are just a little grittier for some reason. Also, they normally will feel very strange right out of the pack, and this is where you will find the squeaks and grimy feel. But in the many packs of Cobalts I've gone through, that goes away in a couple of days, and they feel very nice for months afterwards.
            Overall, these are the best strings I've ever played. I will continue to use these for as long as I can. Be warned though; they do feel very different, sharp almost, straight out of the pack, but don't remove them. They will be much better in a couple of days.

            Comment on this review

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