--- product_id: 4482787 title: "7-String Power Slinky Cobalt Electric Guitar Strings, 11-58 Gauge (P02729)" brand: "ernie ball" price: "Rp601107" currency: IDR in_stock: true reviews_count: 13 category: "Ernie Ball" url: https://www.desertcart.id/products/4482787-7-string-power-slinky-cobalt-electric-guitar-strings-11-58 store_origin: ID region: Indonesia --- # 11-58 gauge for dynamic tonal balance 7-string set for extended range Cobalt alloy boosts magnetic pickup response 7-String Power Slinky Cobalt Electric Guitar Strings, 11-58 Gauge (P02729) **Brand:** ernie ball **Price:** Rp601107 **Availability:** βœ… In Stock ## Summary > 🎢 Elevate your 7-string game with the power of cobalt clarity! ## Quick Answers - **What is this?** 7-String Power Slinky Cobalt Electric Guitar Strings, 11-58 Gauge (P02729) by ernie ball - **How much does it cost?** Rp601107 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.id](https://www.desertcart.id/products/4482787-7-string-power-slinky-cobalt-electric-guitar-strings-11-58) ## Best For - ernie ball enthusiasts ## Why This Product - Trusted ernie ball brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Extended Sonic Range:** 7-string design with 11-58 gauge strings unlocks deep lows and sparkling highs for versatile playstyles. - β€’ **Silent Between Notes:** Innovative design minimizes unwanted string noise, keeping your sound clean and professional. - β€’ **Unmatched Magnetic Power:** Cobalt alloy creates the strongest pickup-string connection ever, delivering richer, more vibrant tones. - β€’ **California-Crafted Quality:** Made in the USA with premium materials for consistent performance and durability. - β€’ **Precision Engineered Clarity:** Tin-plated high-carbon steel core wrapped in cobalt ensures maximum output and harmonic richness. ## Overview Ernie Ball's 7-String Power Slinky Cobalt Electric Guitar Strings (11-58 gauge) feature a revolutionary cobalt alloy that enhances magnetic pickup response for superior tonal output. Engineered for extended dynamic range and harmonic richness, these strings deliver strong lows and crisp highs with minimized noise. Crafted in California with premium materials, they offer professional-grade durability and clarity for serious guitarists seeking to stand out. ## Description Engineered to maximize output and clarity, Ernie Ball Cobalt Slinky 7-string guitar string sets 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. Review: Not just snake-oil. - All comparisons/descriptions are in the context of my guitar (alder body, maple/pau ferro neck with SS frets, hard-tail bridge). I've been using Stringjoy strings for a while now (freaking fantastic by the way, as customizable as you could want gauge-wise) which are very full and lively (lots of harmonics, plenty of mids and they feel amazing for strings made of standard materials). The Cobalts, by direct comparison, have a lot less mids, around the same amount of low end and a bit more presence on top. They jangle very well and would be great for a guitar/pickups that are a little clogged up in the midrange. The set I normally use has gauges very close to this set of cobalts, but the cobalts feel a bit more loose than I would have expected (a few reviews I read stated that, when questioned, the folks at EB said that they're made with a slightly smaller core wire and that's fairly easy to see when inspecting the ball end during installation). They feel a bit rougher than what I'm used to, but they aren't uncomfortable by any means. I feel the greatest strength of this material is just how controlled/quiet they sound. Not just because of the slight scoop in the mids, but I don't hear the strings ring between the nut and tuners at all. Compared to standard slinkys and paradigms the cobalts are far and away my favorite. I'll be switching back to my Stringjoys in 10-14 days, but these are great strings that I could see many applications for. Review: The difference is night and day. Amazing strings. - Look, I don't leave reviews. It's usually a waste of time to me, but I had to leave one for these strings. Let me just say. Wow! Truly. Whatever strings I had before, are complete trash compared to these. I recently got an Ibanez 7-string, and I love it. But something about the sound was just...off. Heck, I even started looking at new pickups to buy! Then these came in. Strung em up, not thinking anything outside of it being time to replace my strings. Then I go to play. And (In Joe dirt voice) DANG!! The sound is so clear and vibrant!! 110% difference! I never would have thought that strings could make such a difference with the sound. It blew my mind. 100% recommend. No joke. If you own a 7-string, these are the strings to get. ## Features - Cobalt produces a stronger magnetic relationship between pickups and strings than any other alloy previously available - Cobalt electric guitar strings provide an extended dynamic range, incredible harmonic response, strong low end, and crisp, clear highs - Wound strings consist of Ernie Ball’s Cobalt alloy wrapped around a tin-plated high-carbon steel core wire - Engineered to maximize output and clarity - Made in California, USA with the finest and freshest materials ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B009YPC4YC | | Best Sellers Rank | #2,333 in Musical Instruments ( See Top 100 in Musical Instruments ) #37 in Electric Guitar Strings | | Body Material Type | Metal | | Brand Name | Ernie Ball | | Coating Description | Uncoated | | Color | Power (11-58) | | Customer Reviews | 4.8 4.8 out of 5 stars (1,853) | | Finish Type | Uncoated | | Global Trade Identification Number | 00749699127291 | | Instrument | Electric Guitar | | Item Type Name | Electric Guitar Strings | | Item Weight | 0.08 Pounds | | Manufacturer | Ernie Ball Music Man | | Manufacturer Part Number | P02729 | | Material Type | Cobalt | | Model Number | P02729 | | Recommended Uses For Product | Electric Guitar | | String Gauge | .011 | | String Material Type | Cobalt | | UPC | 749699127291 | | Unit Count | 1.0 Count | | Warranty Description | None. | ## Product Details - **Brand:** Ernie Ball - **Color:** Power (11-58) - **Instrument:** Electric Guitar - **String Gauge:** .011 - **String Material Type:** Cobalt ## Images ![7-String Power Slinky Cobalt Electric Guitar Strings, 11-58 Gauge (P02729) - Image 1](https://m.media-amazon.com/images/I/81qg411XWEL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Can these strings handle drop G?** A: I haven't tried drop g, but I Play in drop G# no problem. I have a 26.5 scale length, so if you have a 27' it would definitely work. Probably not with a 25.5' though **Q: would these things handle adgcfad tuning? I'm new to guitars and I wanna jam to some Korn** A: These can take ADGCFAD perfectly fine the strings themselves are good for 25.5 inch scale length but even better on a guitar with 26.5 inch scale regardless they have clarity bite and good feel and I highly recommend them for all styles of music. **Q: I need serious advice. Could I use the lower half of these on my 6 string, just to play music for one band? (Deftones)** A: Yes, you can and I have as long as your bridge will fit the strings through it. You will definitely need to adjust the setup though and the longer the scale length the better. **Q: What is the gauge of the 3rd string supposed to be? My set came with 2 13's** A: Gauges for the Ernie Ball 2730 set are: 10-13-17-30-42-52-62. Thanks! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Not just snake-oil. *by P***K on July 3, 2018* All comparisons/descriptions are in the context of my guitar (alder body, maple/pau ferro neck with SS frets, hard-tail bridge). I've been using Stringjoy strings for a while now (freaking fantastic by the way, as customizable as you could want gauge-wise) which are very full and lively (lots of harmonics, plenty of mids and they feel amazing for strings made of standard materials). The Cobalts, by direct comparison, have a lot less mids, around the same amount of low end and a bit more presence on top. They jangle very well and would be great for a guitar/pickups that are a little clogged up in the midrange. The set I normally use has gauges very close to this set of cobalts, but the cobalts feel a bit more loose than I would have expected (a few reviews I read stated that, when questioned, the folks at EB said that they're made with a slightly smaller core wire and that's fairly easy to see when inspecting the ball end during installation). They feel a bit rougher than what I'm used to, but they aren't uncomfortable by any means. I feel the greatest strength of this material is just how controlled/quiet they sound. Not just because of the slight scoop in the mids, but I don't hear the strings ring between the nut and tuners at all. Compared to standard slinkys and paradigms the cobalts are far and away my favorite. I'll be switching back to my Stringjoys in 10-14 days, but these are great strings that I could see many applications for. ### ⭐⭐⭐⭐⭐ The difference is night and day. Amazing strings. *by M***N on June 8, 2021* Look, I don't leave reviews. It's usually a waste of time to me, but I had to leave one for these strings. Let me just say. Wow! Truly. Whatever strings I had before, are complete trash compared to these. I recently got an Ibanez 7-string, and I love it. But something about the sound was just...off. Heck, I even started looking at new pickups to buy! Then these came in. Strung em up, not thinking anything outside of it being time to replace my strings. Then I go to play. And (In Joe dirt voice) DANG!! The sound is so clear and vibrant!! 110% difference! I never would have thought that strings could make such a difference with the sound. It blew my mind. 100% recommend. No joke. If you own a 7-string, these are the strings to get. ### ⭐⭐⭐⭐⭐ Came for nickel free, stayed for the best string feel *by J***E on October 7, 2025* I've got a nickel allergy, these don't have nickel. That's how I started using cobalt strings, but these are simply the best. Silky feel, more durable than standard strings, and louder on the pickups. I wish more brands would start experimenting with cobalt because thus far, there's little comparison to what Ernie Ball is cookin. ## Frequently Bought Together - Ernie Ball 7-String Power Slinky Cobalt Electric Guitar Strings, 11-58 Gauge (P02729) - Ernie Ball Power Slinky Cobalt Electric Guitar Strings, 11-48 Gauge (P02720) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.id/products/4482787-7-string-power-slinky-cobalt-electric-guitar-strings-11-58](https://www.desertcart.id/products/4482787-7-string-power-slinky-cobalt-electric-guitar-strings-11-58) --- *Product available on Desertcart Indonesia* *Store origin: ID* *Last updated: 2026-04-25*