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Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings

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Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings are a perfect match for those who like chunky rhythms for rock and roll or blues. Power S...Click To Read More About This Product

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See All Ernie Ball 6 String Sets for Electric Guitar
OVERVIEW

Try the new and improved strings ideal for drop tuning.

Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings are a perfect match for those who like chunky rhythms for rock and roll or blues. Power Slinkys have long been favored by Slash, Metallica and Kenny Wayne Shepherd due to the thicker gauge combination providing a slightly more powerful tone. 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.

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: 11-14-18-28-38-48.


Start feeling the power of Cobalt today. Order now!

Reviews
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Review Snapshot

by PowerReviews
Ernie Ball2720 Cobalt Power Slinky Electric Guitar Strings
 
4.6

(based on 18 reviews)

Ratings Distribution

  • 5 Stars

     

    (12)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Good tone (8)
  • Long life (7)
  • Well built / quality (6)
  • Consistent (4)

Cons

No Cons

Best Uses

  • Practicing (5)
  • Concerts (4)
    • Reviewer Profile:
    • Experienced (7)

Most Liked Positive Review

 

Best worthwhile string improvement in 30 years

Excellent string - unrealistic price.
I've been playing guitar for around 40 years, most of it on a 1969 Gibson ES345, but I also have a Strat and a customized PRS that...Read complete review

Excellent string - unrealistic price.
I've been playing guitar for around 40 years, most of it on a 1969 Gibson ES345, but I also have a Strat and a customized PRS that I used for mostly live Classic Rock gigs. Because of high humidity here in Florida strings quickly lose the fresh ring they have when you first install them. I've tried many brands including Elixir, which I still use on my Martin acoustic. These Cobalt strings are the best strings I've played for electric. I use .009 - .011 guage strings but I'm using the .011 guage Cobalt strings. They are soft and silky on the hands and the fretboard but deliver a lot of body and especially harmonics. The harmonics of every note make the string "sing" a little better than the non-Cobalt strings. You can hear and feel the difference. I will stick with Cobalt for now. It is a great string - noticibly better than nickel etc. I'm not sure that they're twice as good as a regular string so I'm not convinced that they are priced correctly because the cost is double compared to regular strings. I think if they will bring the cost into the same, or slightly more than, price range as regular strings they'll have massive adoption. For every semi- and professional guitarist out there, there are a thousand amateurs. Pros will shell out double for the Cobalt but non-pros not so much. They'll sell a lot more strings to a lot more people if they make the cost more reasonable.
Top of the line. Literally. Very nice string to hear and to play. Of course, if you're a muppet playing nothing but screamo, metal and grunge with distortion it doesn't matter - chicken wire will suffice. If you want a string that will give you every nuance, that can be a little "hotter" to give you that extra signal and harmonics in pickup output then you are going to love this string.
Too expensive. While the string is very nice, and definately better than others, the doubled price is not warranted. If Ernie Ball expect to achieve universal adoption they need to bring the price within, say, 20% of regular strings. Value isn't that great. I'm a sound snob, but most people can't hear the difference enough to shell out double for this string.

VS

Most Liked Negative Review

 

Good sound, but harsh on fingers

I could definitely hear the improved tone that these strings advertise. However, it felt like I was playing on sandpaper. Because of the feel, I replaced the strings with nickel-plated GHS Boomers after...Read complete review

I could definitely hear the improved tone that these strings advertise. However, it felt like I was playing on sandpaper. Because of the feel, I replaced the strings with nickel-plated GHS Boomers after only a week. I am not a novice, but I am also not the most experienced player. Thus, perhaps a more experienced player would really like these strings for their tone.

Reviewed by 18 customers

Displaying reviews 1-18

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(6 of 9 customers found this review helpful)

 
4.0

Best worthwhile string improvement in 30 years

By bwanagary

from Nashville, TN

See all my reviews

Ask me a question

Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

Excellent string - unrealistic price.
I've been playing guitar for around 40 years, most of it on a 1969 Gibson ES345, but I also have a Strat and a customized PRS that I used for mostly live Classic Rock gigs. Because of high humidity here in Florida strings quickly lose the fresh ring they have when you first install them. I've tried many brands including Elixir, which I still use on my Martin acoustic. These Cobalt strings are the best strings I've played for electric. I use .009 - .011 guage strings but I'm using the .011 guage Cobalt strings. They are soft and silky on the hands and the fretboard but deliver a lot of body and especially harmonics. The harmonics of every note make the string "sing" a little better than the non-Cobalt strings. You can hear and feel the difference. I will stick with Cobalt for now. It is a great string - noticibly better than nickel etc. I'm not sure that they're twice as good as a regular string so I'm not convinced that they are priced correctly because the cost is double compared to regular strings. I think if they will bring the cost into the same, or slightly more than, price range as regular strings they'll have massive adoption. For every semi- and professional guitarist out there, there are a thousand amateurs. Pros will shell out double for the Cobalt but non-pros not so much. They'll sell a lot more strings to a lot more people if they make the cost more reasonable.
Top of the line. Literally. Very nice string to hear and to play. Of course, if you're a muppet playing nothing but screamo, metal and grunge with distortion it doesn't matter - chicken wire will suffice. If you want a string that will give you every nuance, that can be a little "hotter" to give you that extra signal and harmonics in pickup output then you are going to love this string.
Too expensive. While the string is very nice, and definately better than others, the doubled price is not warranted. If Ernie Ball expect to achieve universal adoption they need to bring the price within, say, 20% of regular strings. Value isn't that great. I'm a sound snob, but most people can't hear the difference enough to shell out double for this string.

(2 of 6 customers found this review helpful)

 
5.0

Simply some great strings

By Jerry Cook

from U.S.A.

Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

These strings are good, great. and all over amazing. I looked up tons of reviews by famouse guitar players, and the great people of Ernie Ball, and everything they say is true. From a smooth, buttery feels as you slide your fingertips across them, to the great sound they make every day, these are just great strings!
Some of the best feeling and sounding strings I have ever played.

(2 of 2 customers found this review helpful)

 
5.0

i was skeptical about the claims....

By TRACIE STONE

from seatttle

Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

i would like to have more gauge choices. but i found one that was suitable.
i put a set on an hour before the gig...stayed in tune. was impressed with the tone and harmonics that i got.
nice feel to them. and they performed as advertised.
they were a bit more than what i usually buy but the fact that they held their tune - with a few small tweeks- throughout the show, makes it worth it .

(2 of 2 customers found this review helpful)

 
5.0

Expensive? Yes, but worth a try

By Brett K

from Green Bay Wisconsin

See all my reviews

Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

They're strings. No comments here.
Here's where the new strings shine. Honestly, when I first tried the new Cobalts, I didn't think that they felt any better, and that's good - I wanted them to feel like the regular purple pack I love. They are somewhat brighter in the beginning. I think you can actually hear more of a difference with passive pickups though.

Where I really like them is that they retain the brightness for quite a while. I have noticed that while these strings are more $, I am not changing them as much as before simply because I don't really think it's necessary. This is coming from someone who changed their strings at least once a month. Bottom line is that I believe they last longer.
At $10 a set, that might be a little higher.. I don't know if I would consider them to be 2X better than the standard strings @ $5, but they are better.

(1 of 2 customers found this review helpful)

 
5.0

My guitar has a big butt and i cannot ly

By T-Man

from Quakertown, PA

About Me Professional Musician

See all my reviews

Ask me a question

Verified Buyer

Pros

  • Consistent
  • Fat Lady Sings Tone
  • Good Tone
  • Long Life
  • Strong

Cons

  • None In 6 Mos

Best Uses

  • All Around Winner
  • Backup
  • Concerts
  • Practicing

Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

These strings are like adding a buffer to a long signal chain and quality cables too boot, do the math!

(1 of 1 customers found this review helpful)

 
5.0

Mr. Moby

By Moby64

from Holtville, California

See all my reviews

Ask me a question

Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

My only complaint is that they are kinda expensive the price of like two pairs of strings pretty much . Quality is excellent feel and sound great. I love em the y are so smooth and silky I can play even longer now .
Heavier gauge strings gives you a good beefy sound but are still easy to bend. The sound quality is good. Slightly brighter sounding then regular slinky's. You can actually hear the difference in tone. I noticed it when I was changing my strings and plucked an open string on the colbalt and then on the regular slinky. I think the feel of these strings is amazing, just super silky and smooth. Don't think you'll regret buying them.
I've haven't tried many different types of strings but these feel amazing and sound great . I'll be using these for now on. I was sold with regular slinky's but these are even better. They are pricey but the feel of these strings are like butter.
Kinda expensive but worth it. I think once they start selling the price should probably drop some. Then they'll really sell.

(1 of 1 customers found this review helpful)

 
4.0

Awesome strings!

By J Matthew Croushorn

from Nashville, TN

Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

I used to play DR Pure Blues and their coated strings, but I've been experimenting around with different brands and these strings might have me convinced to switch! The price just feels like a little too much, but if they last longer than the nickel wound strings it may be worth it for the enhanced sound.
These strings are a bit brighter than your standard nickels, and I can really hear the harmonics of every note I play. Can get a little tinny say on the bridge pickup of a Strat or Tele, but if you're buying these strings you should probably know how to use a tone knob by now. The lower strings feel a bit more pliable while still giving you that nice boomy sound that we all like from our Power Slinkys.
I haven't had these on my guitar for very long, but if anything it seems that they'll last a bit longer than regular old Slinkys before they get stiff and crappy. Very smooth to the touch, so far so good!
I really like the sound of these, but the price is a little steep for what you get.

(1 of 1 customers found this review helpful)

 
5.0

Best strings hands down...

By Rob

from Mars, PA

See all my reviews

Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

I have what one would call "swamp hands". I play both bass and guitar and used to play out with a local band on a semi regular basis. I love the bright sound of new strings and had to change them every show due to the grunge build-up I'd leave even after wiping them down.

After playing them for a considerable amount of time now (Month or so), I'd say that they are as bright and playable as the day I put them on.

It would take almost an act of God to make me ever switch to anything else.

 
5.0

Cobalt strings is what i will be using for now on

By Jeremy Hall

from Cleveland,Tn.

About Me Professional Musician

See all my reviews

Verified Buyer

Pros

  • Consistent
  • Good Tone
  • Long Life
  • Strong

Cons

    Best Uses

    • Backup
    • Concerts
    • Practicing

    Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

    They do exactly what they say they do. Great tone and I got another pack on the way

     
    5.0

    Ernie Ball

    By Richard

    from Frog, Texas

    About Me Experienced

    See all my reviews

    Verified Buyer

    Pros

    • Consistent
    • Good Tone
    • Long Life
    • Strong

    Cons

      Best Uses

        Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

        I've been using Ernie Ball strings for 45 years. I have tried others and always come back to Ernie Ball.

        (0 of 1 customers found this review helpful)

         
        3.0

        Good sound, but harsh on fingers

        By Drew

        from Fort Worth, TX

        About Me Experienced

        See all my reviews

        Pros

        • Good Tone

        Cons

        • Rough Feel

        Best Uses

          Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

          I could definitely hear the improved tone that these strings advertise. However, it felt like I was playing on sandpaper. Because of the feel, I replaced the strings with nickel-plated GHS Boomers after only a week. I am not a novice, but I am also not the most experienced player. Thus, perhaps a more experienced player would really like these strings for their tone.

           
          5.0

          Adds tone to thin-sounding guitars

          By Nightspore68

          from Fort Worth, TX

          About Me Experienced

          See all my reviews

          Ask me a question

          Pros

          • Good Tone

          Cons

          • Harder To Bend

          Best Uses

          • For Weak Pickups
          • Practicing

          Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

          I had really lost interest in my Charvel Wildcard. Its tone was thin and almost grating. The notes didn't have any heft. It was a shame because the guitar is very easy to play and has a real comfortable yet fast neck.

          I actually got these strings by accident after misinterpreting the Ernie Ball website, which recommended them for richer sound. I think what they really meant was for bass-heavy tone, i.e., to fatten up a Strat. When I realized this I decided to try them on my Charvel instead of the Les Paul I had planned to put them on.

          I'm really glad I did. The Charvel sounds terrific now. It's a real "full-bodied" tone with these .011s. It is harder to play (but not hard to play). And it's much harder to bend notes. But on the upside you have to really mean it when you hit a string or there's little response, and I find this cuts down on the number of unintended notes I play.

          Also I think it's an excellent practice string, almost an acoustic guitar gauge that will strengthen your fingers. Switching to a guitar with a lighter gauge after playing these is a bit of a relief on one's hands.

          I should mention I've got the Charvel tuned down one-half step now (and the intonation checks out OK, strangely, even though I had .009s on that guitar previously).

          If it matters I play mostly blues-rock, like Zeppelin and Cream. I would think these strings suitable for any genre, however.

          Incidentally, before I installed them, I got email approval from both Gibson and Charvel. (I was worried they might damage the set neck on the Gibson, but they said not to worry.) Charvel said I might need to adjust the truss rod, which I haven't and I don't think I need to.

          I recommend trying them out, especially if you have a guitar whose tone you haven't been able to unlock.

           
          4.0

          Great Strings - if you like the tone.

          By NJ Guitarist

          from NJ

          About Me Experienced

          See all my reviews

          Ask me a question

          Pros

          • Long Life
          • Strong

          Cons

            Best Uses

              Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

              I tried these for a few months. Guitar players are always looking for something new and different. At first, I was over-the-top about them but grew tired of the tone they produce. I recently changed to EB RPS11's and have returned to a truly clear and recognizable tonal quality that I enjoy more. It all comes down to personal preferences and guitar players all have them. Try Cobalt strings for yourself and decide if you like the quality of their sound.

               
              5.0

              My New Favorite Strings!

              By Niloy63

              from Portland, ME

              About Me Experienced

              Verified Buyer

              Pros

              • Better Low-end Definition
              • Consistent
              • Good Tone
              • Increased volume
              • Long Life
              • Strong

              Cons

                Best Uses

                • Concerts
                • Practicing

                Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

                Quite simply, these strings brought my guitar even more to life. There was a NOTICEABLE difference! I have the 10 gauge on my Strat and my Schecter C1 Classic, and the 11 gauge on my Les Paul and my C-1 35th Anniversary. And let me tell you... they ALL sound better! I highly advise you try these!

                 
                5.0

                Added crunch

                By taillightguarantee

                from Joliet Il

                About Me Experienced

                See all my reviews

                Ask me a question

                Pros

                • Good Tone

                Cons

                  Best Uses

                    Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

                    They made a noticeable difference in output from my pickups.

                    Worth the extra money.

                     
                    5.0

                    Last Forever

                    By VaporizerMax

                    from Vermont

                    About Me Experienced

                    Pros

                    • Long Life
                    • Strong

                    Cons

                      Best Uses

                      • Concerts
                      • Practicing

                      Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

                      I play in a metal band. I've played a lot of different strings, but keep coming back to power slink's. While I love the feel and sound, they were always good for a couple of practices and maybe a show or two. After which, I knew one of them was about to break and the sound just wasn't the same. I balked at the price of Cobalts but felt that longer life, if real, was worth it. I got ready for a mini tour (five dates) and strung on these bad boys. They lasted throughout two practices and all five shows without breaking, and only now is the sound a little more dull. This might not seem that rare to you, but trust me. No strings have ever made it through multiple shows with me. We thrash on them too hard. These babies rule. Well worth the extra cash.

                       
                      4.0

                      Helps Passive Pickups

                      Pros

                      • Good Tone
                      • Long Life

                      Cons

                        Best Uses

                          Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

                          I really like what they do to passive pickups. For me it tightend the sound up. Bass is more focused and mids come through better. However I tried them on my EMG equipped guitar and felt it thinned the sound out too much, however the Dunlop Heavy Core strings sound great with EMGs. Worth a try.

                           
                          4.0

                          Pretty cool!

                          By Nate-jR2-P

                          from OH

                          See all my reviews

                          Comments about Ernie Ball 2720 Cobalt Power Slinky Electric Guitar Strings:

                          The sound difference doesn't really live up to the hype, but the feel sure does. As for durability, time will tell. They're worth grabbing a set just to try them out...who knows, might be your new favorite strings.
                          These strings feel different. Though they are the same guage as the strings I typically use, they feel heavier, and yet more elastic. The difference in the material is tangible, that's for sure.
                          The sound difference is nominal (compared to normal Power Slinkys) but they do seem to pull out different frequencies than I'm used to. Haven't decided if I like it or not yet. And I didn't record or anything to compare the output, but they do seem to sustain a little longer than a new set of non-cobalt strings.
                          Not sure if it will be worth the cost, depends on how long they last and how quickly they lose their sparkle. If the whole cobalt thing is a flash in the pan, I sure fell for it, but for now I'm pleased with them.

                          Displaying reviews 1-18

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