Authentic Acoustic Flexible Core

This may help someone looking at these strings: I have a Martin Custom D (I believe it's basically a D-15 with a spruce top) that I bought a couple years ago as my lifetime guitar. I haven't even changed the strings on it yet, but they were getting old and grungy so it was time. I think they were Martin PB mediums. They sounded great, but I thought they were a tad high on tension and thickness. I play electric too so I prefer slightly lighter strings. I decided to give these Silk and Phosphor custom 11 Martins a try. Stringing them was a breeze as I could right away tell they were thinner and more flexible than the original strings. I could tell right away my Custom D lost plenty of volume. From the first chord I finger picked, I was a bit disappointed in the loss of volume and presence. I would be embarrassed to play my guitar in a bluegrass jam with these strings. On the other hand, for practicing around the house and fingerpicking, they are pretty dreamy. I would imagine to move up to the next gauge in these silk and phosphors would help bring up the volume a good bit. They also retain the guitar's natural sound profile, so playing is still a pleasure. The bass is drastically reduced but the mids and treble tones are still there. The guitar has lost some of that signature Martin ring and bass , but I know I can always get it back if I swap back to regular PBs. These strings definitely make my Martin sound a bit more like a Taylor strung with Elixirs, if anyone is interested, which I know most will not be. But it's good to know I can experiment and get different sounds out of the same guitar. For the price, these are worth a try and I have no regrets, especially as practice strings! Just thought I'd update this review: as these strings aged , they actually got better. I swapped them off my Custom D and onto a Martin OM-15. They lost any brightness but they still have a great fundamental tone. They sound close to Martin monel strings now. I still love them and they're getting dark with age but still ring true and sound amazing. Great value!

I bought these for my 96 Fender DG acoustic I've had since new. The guitar has been all around the country and used in places Camping,the beach ECT not good for acoustic guitars. Plus it doesn't spend much time in a case and has never seen a humidifier. So, it has issues. I built and installed a bridge doctor but the neck needs reset as well. These strings are a nice stepdown in tension and help the guitar to be playable. The sound is good and I've gotten a year out of the set. They are a good value and option to keep a old workhorse around a few more years.

D'Addario strings are great! I have their XS Phosphor Bronze on my guitars but tried the Silk n Steel on the mahogany guitars and they are fantastic. Adding mellow tones to the sound. I saw these Silk and Phosphor and had to try them. I put them on a new 0 sized spruce and rosewood guitar. Easy on your fingers, do very well on bending and add just a little brightness to the mellow tone. I have already ordered more.

Been using Flexible Core PB strings for years, but these are my first Silk and Phosphor set. I got these for a 50+ year old guitar that has had a past issue with a belly bulge. The bulge has mostly been removed, but now I want to minimize the tension as much as I can so it doesn't come back. I've been tuning it down a half step for this. Since these strings have about 25% less tension than regular Flexible Core PBs, I felt okay using standard tuning. They have a mellow tone which is pretty pleasant. The highs on this guitar are naturally subdued, so I normally use brighter strings to help. Unfortunately, these strings make it worse. Although the low tension might allow me to use standard tuning, on this guitar, a tuned down a set of PBs sounds better.

Quality strings with light tension a nice warm tone. The price is great.

Really like these strings on my acoustics. Nice feel, minimal stretching, good tone and performance. These are my go-to’s. Can’t beat them for the price.

I put these on a Yamaha APX 50O electric Acoustic and a Godin Seagull Coastline S6. The strings really do help a ton with fingering; very easy to play and they do bend easily (i have carpal tunnel and these light gauge help with fingering). My only gripe is that the sound isn't as rich or bright as the medium guage--the highs are quite thin, almost tinnie and the bass note are not too full-- however, overall, they are just what I wanted and needed. One more observation, these strings are quieter, not as much volume as medium guage strings, but for me, that's what i like, less volume. I would definitely buy them again.

These strings are not for every guitar. But, if you get them on the right one, they are wonderful. If your guitar has a top that is very responsive to lighter gauge strings, these are awesome. They feel great on the fingers and strum beautifully. If you are an aggressive strummer they may not be for you either, but if you can control your dynamics they're great. I recently put these on a carbon fiber topped guitar and they absolutely sing and are a joy to play.