My old fingers cant manage heavier gage strings anymore. anybody happy with "extra lights" 10-47's ? is the ease of play worth the loss in tone?

You might try silk and phosphor 11- 47. They play easily while maintaining the more traditional tone. .115 - 47 silk and steel play well but are very mellow tonally. Alot has to do with the guitar itself and of course personal preference. Additionally, you may have to set the guitar up again. The strings will ride slightly lower in the saddle and nut. And they will not pull the neck as much. No easy way other than trial and error. I have 17 acoustics and have tried several sets on each guitar before settling on what I like on that particular guitar. Only 2 of the 17 uses the same strings. Good luck.

Anyone using these for fingerstyle blues? What do you think of them?

I only play fingerstyle, and I play blues, jazz, pop...I LOVE these strings. If you're not plugged in you may notice a little less volume. Nothing drastic. They sound a bit more "warm." Slides are sweet. They're not that expensive. (I have used another brand that cost something like $30. They are a little nicer, but I can't afford that luxury all the time.) Try a set. Your fingers will thank you.

Is the core in of the d'addario eft15 round core?

Down in the product details at the bottom of the page -- "D'Addario Phosphor Bronze strings are precision wound with corrosion-resistant phosphor bronze onto a carefully drawn, hexagonally shaped, high carbon steel core. " Note the "hexagonally shaped, high carbon steel core" so NOT a round core.

Wait a second, the title for the item is flattened, the description page says roundwound, and one of the answers says they are halfwound. Which is it?

They are flattened. Flat round is a different type of string. Basically its like the small humps of the round string are ground down .

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D'Addario Flat Tops Phosphor Bronze Strings EFT16, 12-53

Product ID: 1371901

Details

Brand
D'Addario
Color
Bronze
Instrument
Acoustic
String Gauge
Light
String Material Type
Phosphor

🎸Precision wound for flawless tone

♻️Eco-friendly recyclable packaging

⚙️Hex core for durability & balance

SAR 111

Duties & taxes included

In stock

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Description

🎶 Elevate your acoustic game with the smoothest, warmest strings on the market!

MADE IN THE USA - Crafted with exacting specs in New York for consistent pro-level performance.
WARM BALANCED TONE - Phosphor bronze wrap delivers rich warmth with a semi-bright edge across all genres.
PLAYERS CIRCLE REWARDS - Register your strings and earn exclusive points—join the elite community of musicians.
LIGHT GAUGE VERSATILITY - 12-53 gauge strikes the ideal balance between playability and full-bodied sound.
SMOOTH SEMI FLAT SURFACE - Precision ground & polished for ultra-quiet finger noise—perfect for studio pros.

D'Addario Flat Tops Phosphor Bronze Strings EFT16 (12-53) are precision wound acoustic guitar strings featuring a hexagonal high-carbon steel core wrapped in phosphor bronze. Their unique semi-flat polished surface reduces finger noise, making them ideal for recording and slide playing. These light gauge strings offer a warm, balanced tone suitable for all musical styles. Made in the USA with eco-conscious packaging, they come with a Players Circle code to earn rewards, solidifying their status as the industry standard since the 1970s.

Specifications

ASIN	B0006IQN2U
Best Sellers Rank	#3,423 in Musical Instruments ( See Top 100 in Musical Instruments ) #49 in Acoustic Guitar Strings
Body Material Type	Phosphor Bronze
Brand Name	D'Addario
Color	Bronze
Customer Reviews	4.6 4.6 out of 5 stars (710)
Finish Type	Polished
Global Trade Identification Number	00019954121235
Included Components	6 guitar strings
Instrument	Acoustic Guitar
Item Highlight	Flat Tops phosphor bronze acoustic strings deliver warm semi-bright tone, smooth feel, reduced noise and stable tuning.
Item Type Name	Acoustic Upright Bass
Item Weight	2.86 g
Manufacturer	D'Addario &Co. Inc
Manufacturer Part Number	EFT16
Material Type	Phosphor Bronze
Model Name	EFT16
Model Number	EFT16
Number of Items	1
Recommended Uses For Product	Acoustic Guitar
Set Name	EFT16
Sound Profile	Warm, Semi-Bright
String Gauge	Light
String Material Type	Phosphor Bronze
UPC	019954121235
Warranty Description	D'addario strives to be a customer-centric company dedicated to producing the highest quality musical instrument accessories in the world. If you have purchased a d'addario product that you believe to be defective, we invite you to submit a contact us form, selecting defect/warranty as inquiry type. We are committed to providing a fair resolution and hope that you will want to continue supporting …

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