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🎸 Elevate your tone, shred with ease, and never miss a beat!
Ernie Ball Extra Slinky Cobalt Electric Guitar Strings (8-38 gauge) feature a revolutionary cobalt alloy that maximizes magnetic pickup interaction for superior output and clarity. Designed for fast playability with extra light tension, these strings deliver an extended dynamic range, crisp highs, and strong lows. Made in California with premium materials, they offer durability and smooth fretboard feel favored by professional guitarists worldwide.



| ASIN | B007NCVWNW |
| Best Sellers Rank | #365 in Musical Instruments ( See Top 100 in Musical Instruments ) #7 in Electric Guitar Strings |
| Body Material Type | Cobalt |
| Brand | Ernie Ball |
| Brand Name | Ernie Ball |
| Coating Description | Cobalt |
| Color | Extra (8-38) |
| Customer Reviews | 4.7 out of 5 stars 527 Reviews |
| Finish Type | Uncoated |
| Global Trade Identification Number | 00749699127253 |
| Instrument | Electric Guitar |
| Item Type Name | Electric Guitar Strings |
| Item Weight | 18.14 g |
| Manufacturer | Ernie Ball Music Man |
| Manufacturer Part Number | 2725 |
| Material Type | Cobalt |
| Model Name | Extra Slinky |
| Model Number | P02725 |
| Number of Items | 1 |
| Recommended Uses For Product | Electric Guitar |
| Set Name | Ernie Ball Extra Slinky Cobalt Electric Guitar Strings |
| Sound Profile | Bright |
| String Gauge | .008 |
| String Material Type | Cobalt |
| UPC | 749699127253 |
| Unit Count | 1 Count |
| Warranty Description | None. |
D**O
Sold on Cobalts!
These strings are amongst the 2 best for tone I've ever tried. I'd tried Ernie Balls before but never liked them. These stings are very balanced and sound better not only for chords but in comparison to the Fender 3150SL, 8guage, pure nickel I've been using, they are much stronger for solos, as well. Due to arthritis, I have to use 8 gauge and while different from the 9 gauge, which I did try, they don't sound thin and whimpy. The timbre also does not get thinner when playing above the 15th fret. These are very ballsy strings for 8's. Related, but perhaps guitar dependent is the following: I use a Fender Jeff Beck Strat. It has a roller nut. While it is better than a static nut, sometimes strings do get caught up and remain either sharp of flat. I play a lot, a couple of hours a day. Even after stretching, it took one week for the G string to settle in to tune. The other stings were typical of other good sets. I used them last night beginning week 3 and they are staying in tune very nicely. I know people ding 8's saying they never stay in tune, but I've been using 8's for quite some time. I found it is manufacturer dependent and yes, sometimes it is set dependent. But, sometimes you get a set of anything that lasts longer than others even with the same amount of use, so who is to really say. It's a thing of averages. This is my first set of Cobalt 8's and I'm testing the longevity , too. I am quite tough with bends on the first 2 strings often bending 2 1/2 steps. The first 3 strings still sound great after 2 solid weeks, though I think the low E is beginning to fade. That's pretty darned good life and even if I had to change them at the typical 2 weeks I get on the Fenders, I'd stay with these at the added expense because the tone is so good. Also note that I ALWAYS clean my strings after use and between sets, rubbing them down with Fender SLICK after wiping each string individually with a chamois. I found that with the Fender 3150s that doing this doubles string life. No joke. Doubles string life. So, here I go into week 3. If I remember to, I'll update this review.
J**E
love these strings!
i always used the blue steel Lt or xls like my 8. but this is first time with ernie ball cobalt extra slinky. was very surprised how much better the sound was in these types of strings.got them broke in lowest e pop right out? think slipped out under the wind? never ever seen that but after fighting back in ,and going over and under it. wound it on the tuning pegs.they are great sounding. way easier on the wrist and fingers.i have the grip from com. fishing. can't play for long at all but still like tryin. been tryin to make my action better on the warlock plus.so i can play longer without pain.this made BIG DIFERENCE IN SOUND AND PLAYABILTY, SUSTANE THAT YOU LOSS IN NORMAIL 8. STRINGS THIS IS 5 STAR SET! will try other ernie ball soon looking for more of the *8
M**R
A step up from regular Super Slinkies
I’ve been using Ernie Ball Super Slinkies since 1969. Tried a few others every once in a while but always went back to the Slinkies. But these are my new favorites. They’re like Super Slinkies on steroids. They’re great!!
A**R
Was impressed with these stings
Used on a 3 pickup guitar, single, single, double, I like 08, I use a. Rack mount marshall 9000 series , covers everything quiet creamy soft blues to outright heavy distortion
T**T
Great product
Mt my expectations
A**D
Great playing strings and last a long time!
They feel and play great. They last a really long time. Buy a pack of these and then buy a pack of the John Mayer signature strings as well. The John Mayer strings feel and play awesome!
B**H
Excellent sound
I tried Cobalt strings for the first time out of curiosity. I put them on my 91 Stratocaster and was astounded at the sound. If I compared regular strings as black and white Cobalt would be in color. Will only be using them from now on.
M**T
Good
Good strings
K**D
O som das cordas é bem brilhante
Eu gostei muito do timbre que essas cordas tem, é bem mais brilhante e tem um sustain maior do que a corda que estava usando antes. Com certeza vou comprar esse de novo.
M**Z
Muy buena calidad.
Usualmente usaba cuerdas La Bella, que son muy buenas, pero ya no es muy fácil encontrar de este calibre. Las Ernie Ball de Cobalto son actualmente las mejores cuerdas que he encontrado de ese calibre.
A**R
Very good strings
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
R**K
A great string for the price.
Great for bending. They stay in tune and are easy to play.
A**ー
6本中3本が錆びていました
1~3弦が錆びており使い物になりません。 星1つにしていますが本来の音がわからない状態なのでもともとの品質の評価というわけではないですが。 008というあまり使われないゲージなので在庫が相当古かったんでしょうね。 メーカーさんとしてはさぞ不本意でしょう。プレイヤーは理想の音に近づけるため悩んで悩んで、試行錯誤を重ねているのにそれを妨げるようなことが起きてしまうのが非常に残念です。 ここでは2度と買いませんが、音楽業界の将来のため改善を期待します。
Trustpilot
2 weeks ago
5 days ago