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Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings

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Martin SP Flexible Core strings have a thin, but strong core wire and a thicker wrap wire, which allows them to be flexible and easy on the fingers w...Click To Read More About This Product

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OVERVIEW

It isn't just about flexibility; it's about bending the note 'til it rings true.

Martin SP Flexible Core strings have a thin, but strong core wire and a thicker wrap wire, which allows them to be flexible and easy on the fingers while holding standard tension. SP Flexible Core strings feel soft to the touch, making them ideal for beginners. But don't be fooled by comfort! Just ask Tommy Emmanuel, who performs with Martin's SP Flexible Core strings night after night. With SP Flexible Core, you get total flexibility and total control.

FEATURES
Set: MFX740
Gauge: Light
12-16-25-32-42-54
Tension: 164.8

Change those guitar strings! Call or click today to order.

Reviews
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Review Snapshot

by PowerReviews
MartinFX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings
 
4.3

(based on 31 reviews)

Ratings Distribution

  • 5 Stars

     

    (21)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (3)

90%

of respondents would recommend this to a friend.

Pros

  • Good tone (18)
  • Consistent (17)
  • Well built / quality (13)
  • Long life (10)

Cons

No Cons

Best Uses

  • Practicing (13)
  • Concerts (10)
  • Back-up (7)
    • Reviewer Profile:
    • Experienced (15), Professional musician (7)

Most Liked Positive Review

 

Revisit

I did a review of these strings last December. I have to update my review because these strings are the BEST I ever used by far. I have them on a Martin that I...Read complete review

I did a review of these strings last December. I have to update my review because these strings are the BEST I ever used by far. I have them on a Martin that I restrung last January and they still sound as good, if not better than after they first took seat.
I only play at home these days and I change my strings at least once a month untill I tried the FX 12/54's.

VS

Most Liked Negative Review

 

Tried 'em; don't like 'em

This was my first experience with Martin Flexible Core strings. Thought I'd give them a try, shooting for a little more ease in playing up the neck. My Martin has GREAT tone with...Read complete review

This was my first experience with Martin Flexible Core strings. Thought I'd give them a try, shooting for a little more ease in playing up the neck. My Martin has GREAT tone with just about any string I put on, but the FX 12s just sounded dead. They had a really stiff feel, with a LOT of finger noise as you move around the neck. My wife, who also plays a Martin, noticed it immediately.She said it didn't even sound like my guitar. They felt new and sounded old. I went back to my usual Lifespan SP 12s. They're more expensive, but well worth it. They feel much better, and sound WAY BETTER.

Reviewed by 31 customers

Displaying reviews 1-20

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(5 of 5 customers found this review helpful)

 
5.0

Revisit

By Chip

from Florida

About Me Experienced

See all my reviews

Ask me a question

Pros

  • Consistent
  • Easy To Play
  • Good Tone
  • Long Life
  • Strong

Cons

  • None

Best Uses

  • Anytime - Anywhere
  • Backup
  • Concerts
  • Practicing

Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

I did a review of these strings last December. I have to update my review because these strings are the BEST I ever used by far. I have them on a Martin that I restrung last January and they still sound as good, if not better than after they first took seat.
I only play at home these days and I change my strings at least once a month untill I tried the FX 12/54's.

(5 of 5 customers found this review helpful)

 
5.0

Get some - Play Happy at a Great Price!

By Harold Fields

from Ohio

See all my reviews

Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

Play Happy at a Great Price!

The price and my curiosity overcame my doubts and I ordered a few sets of FX740 Phosopher Bronze 12's. It was a nice surprise and I quickly ordered a dozen more. They stay tuned, are easy on the fingers and fretboard, great tone and overtones when amped are bold! Even when I double capo the harmonics are right on pitch... Get some -

I have used composite 'silk & steel' strings for over 20 years on my 68 Martin Brazilian D35 12string and for 10 years on my Heritage 355 acoustic electric. I love the warm rich tones and easy fingering. Get some - Play Happy at a Great Price! When I read Martin was producing a 'flexible' core all steel string I was skeptical concerning tension and issues with capo's.

(4 of 4 customers found this review helpful)

 
5.0

Nice

By Chip

from Florida

About Me Experienced

See all my reviews

Ask me a question

Pros

  • Consistent
  • Fun
  • Good Tone
  • Strong

Cons

    Best Uses

    • Practicing

    Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

    I bought these strings because my fingers are getting old and stiff. I was looking for a softer bend and smooth feel. I expected to give up some tonal qualities and volume, but, to my surprise these strings give me everything I was looking for without any sacrifice. These are great strings.

    (3 of 3 customers found this review helpful)

     
    5.0

    great guitar strings

    By steven lindahl

    from LO CAL

    See all my reviews

    Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

    Overall I wouldn't use any other strings unless I have no choice
    I love these Martin guitar strings, Very seldom that I would use another brand (only if I can't get the martins) They are light enough to get that crisp sound the way all acoustic acoustics should sound, and you can get the low bass tone also, For the price I don't think you could get a better product, If you have never tried them, You should go out and get a set, You will be pleasantly surprised
    Like there guitars, The strings have the same quality
    The price is great, Like I wrote above, You can't beat the price

    (2 of 3 customers found this review helpful)

     
    3.0

    Just OK

    By RockNBlues

    from Detroit

    See all my reviews

    Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

    They were cheap and the flexible core idea was interesting so I bought a couple of sets. After a couple of hours playing, I can't say that I notice any big difference in playability. What I do notice is all treble, no bass. The quality is OK for the price but they are not something I would buy again.

    (1 of 1 customers found this review helpful)

     
    5.0

    Love these strings

    By Sam

    from Kent, WA

    About Me Experienced

    See all my reviews

    Verified Buyer

    Pros

    • Good Tone
    • Strong

    Cons

      Best Uses

      • Practice or Performing

      Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

      I'm really liking these strings. I have used D'Adarrio exclusively for years. These strings might just top them. I admire and trust Tommy Emmanuel and these are the strings he uses and recommends. When he says they are the best sounding strings he has ever played I believe him. I have only used them a couple of days so can't vouch for longevity, but they sound absolutely fantastic. Bright and clear. Great intonation. i think I have found my new favorite strings.

      (1 of 1 customers found this review helpful)

       
      5.0

      No more cramped hands

      By Stringbabe

      from Boston, MA

      About Me Professional Musician

      See all my reviews

      Ask me a question

      Pros

      • Consistent
      • Easy on the fingers
      • Good Tone
      • Long Life
      • Strong

      Cons

      • Non

      Best Uses

      • Backup
      • Concerts
      • Practicing

      Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

      Recently tried these strings on my Martin OMCA4 .
      A relief on my fingers and my hand doesn't cramp up playing long gigs. The added plus is these Strings sound great acoustically as well as plugged into an amp.

      Haven't experienced breakage/snapping while playing / changing strings as mentioned in a prior review.

      I will also give the FX 80/20 lights a try on my acoustic/electric. From the reviews they also seem like a good first or second choice.

      (1 of 1 customers found this review helpful)

       
      5.0

      Easy on the fingers and nice tone

      By Stringbabe

      from Boston, MA

      About Me Professional Musician

      See all my reviews

      Ask me a question

      Verified Buyer

      Pros

      • Consistent
      • Good Tone
      • Long Life
      • Strong

      Cons

      • Non

      Best Uses

      • Backup
      • Concerts
      • Practicing

      Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

      Always use Martin Strings on my acoustic's. Tried these for the first time and really like them. Much easier on the fingers :-)

      (1 of 5 customers found this review helpful)

       
      1.0

      Best Strings After Trying Dozens of Strings

      By Martin000

      from Oregon

      See all my reviews

      Ask me a question

      Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

      Hard to beat for sound/value
      I have tried all kinds of strings. I consider the FX 80/20 to have the best sound for the dollar that last the longest. When they first go on, they have insanely powerful. In 2-3 weeks you lose some of the projection but they wear so well that I don't notice any change in overall sound for 4-5 weeks at least. I have had some sets on those guitars I play less for 2-3 months and they sound decent.

      Buy four every six months and you are done. The tension is so low that it is great for fingerstyle and they just don't buzz. Buy a set of mediums with more sound and less tension that the average pair of lights. Lots of projection and great sound for a great price per set??? No brainer!

      And if watch the sales, I picked these up on sale! 10 boxes a year and I'm good!
      Last forever
      Best bang for buck

      (1 of 2 customers found this review helpful)

       
      1.0

      Martin FX Strings

      By oneill

      from Pennsylvania

      See all my reviews

      Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

      Sounds good but seriously needs a quality check
      I have bought these strings for years and thought they sounded great and loved them but recently every time I buy a new set of strings they snap for no reason. Not while im playing or while i was tuning. This has happened about 3-4 times in a row where I can't play my guitar due to the strings snapping within a day, like my D and G strings, which really have no reason to break at all

       
      5.0

      Perfect for overplayed finger tips.

      By Brother Bill

      from Pasadena, Md.

      About Me Experienced

      See all my reviews

      Verified Buyer

      Pros

      • Consistent
      • Good Tone
      • Strong

      Cons

        Best Uses

        • Concerts
        • Practicing

        Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

        When your calluses have tendered out, these string are a welcome feel.

         
        5.0

        Try them

        By Ravenbarron

        from Iowa

        About Me Professional Musician

        See all my reviews

        Verified Buyer

        Pros

        • Consistent
        • Good Tone
        • Long Life
        • Strong

        Cons

          Best Uses

          • Concerts
          • Practicing

          Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

          The only steel strings I use.

           
          5.0

          I would definitely recommend these strings!

          By Bren

          from NY

          About Me Experienced

          Verified Buyer

          Pros

          • Consistent
          • Good Tone
          • Long Life
          • Strong

          Cons

            Best Uses

            • Practicing

            Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

            These strings feel less hard on my hands and the sound is pleasing.

             
            5.0

            Love this String!

            By Terry from Hawaii

            from Mililani, HI

            About Me Experienced

            See all my reviews

            Verified Buyer

            Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

            I was expecting to play several nights in a row, and my fingers don't seem to be able to stand the tension of Light Gauge (12-54) acoustic strings these days. I tried Martin Flexible Core Silk & Steels, but they were a bit too floppy and soft in volume.

            I tried these instead, and they are great! They are just a tiny tad lower in volume than regular phosphor bronze, not as floppy as silk & steel, and are gentle on the fingers!

            My "B" string wasn't ringing out very well when I first put it on, but it loosened up and was fine a few hours later.

             
            5.0

            Good Strings, Nice Packaging

            By Jon Fields

            from Allentown, PA

            About Me Professional Musician

            See all my reviews

            Ask me a question

            Verified Buyer

            Pros

            • Good Tone

            Cons

              Best Uses

                Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

                I've played a three set gig, a two set gig, a three hour rehearsal, and daily practice on my first set of Flexible Core 12s this last week. I am not sure if the tone or playability is really that different from my usual D'Addario EJ16s. The thinner core wire does not seem to make them more prone to breakage. These are nice sounding high quality strings. The packaging is definitely a big improvement over D'Addario. The strings are individually enveloped and the outer packaging opens as easily as a bag of potato chips (and probably very effective at keeping moisture out). You could actually change a string at a gig with these strings as packaged.

                 
                4.0

                My husband and I play the guitar, strings are great

                By Dave, magic fingers

                from Catawba County, NC

                About Me Experienced

                Verified Buyer

                Pros

                • Consistent

                Cons

                  Best Uses

                  • Backup
                  • Practicing

                  Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

                  Flexible and easier on the fingers. Sound is clear and distinctive

                   
                  4.0

                  Great sounding strings

                  By Gb3ck

                  from New York, NY

                  About Me Experienced

                  See all my reviews

                  Verified Buyer

                  Pros

                  • Consistent
                  • Good Tone
                  • Well balanced

                  Cons

                  • Stiff feel compared to J16 D'Addarios

                  Best Uses

                  • All purpose

                  Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

                  I put these strings on my Taylor 414ce. I play mostly fingerstyle. I had been using D'Addario J16 light gauge strings. The SPs have a richer, stronger bass and more articulate trebles all with good balance. Although I like the sound of the SPs better than the D'Addarios, the feel is not as nicefor me. The Flexcore supposedly give these Martins a softer feel but I think the D'Addarios feel a lot more flexible and comfortable to play, whether due to the string construction or the fact that the D'Addarios have a smaller gauge low E and G I am not sure. I am going to try the Martins on my GS Mini Taylor where I think they may be perfect. Remember that string sound and feel is very subjective and is different for each guitar.

                   
                  2.0

                  Tried 'em; don't like 'em

                  By potatobattery

                  from Erie, PA

                  About Me Experienced

                  Verified Buyer

                  Pros

                    Cons

                    • Poor Tone Quality

                    Best Uses

                      Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

                      This was my first experience with Martin Flexible Core strings. Thought I'd give them a try, shooting for a little more ease in playing up the neck. My Martin has GREAT tone with just about any string I put on, but the FX 12s just sounded dead. They had a really stiff feel, with a LOT of finger noise as you move around the neck. My wife, who also plays a Martin, noticed it immediately.She said it didn't even sound like my guitar. They felt new and sounded old. I went back to my usual Lifespan SP 12s. They're more expensive, but well worth it. They feel much better, and sound WAY BETTER.

                      (0 of 1 customers found this review helpful)

                       
                      4.0

                      1st time trying these strings & I love them.

                      By Arturo

                      from NYC

                      About Me Professional Musician

                      Verified Buyer

                      Pros

                      • Consistent
                      • Good Tone
                      • They stay in tune!

                      Cons

                        Best Uses

                        • Backup
                        • Concerts
                        • Practicing

                        Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

                        I've been using these on my Epi Masterbilt EF 500, and they have a warm tone without lacking in brightness. When I dig in, they spank. Intonation seems to be better than some other brands I've used. Great price!

                         
                        5.0

                        Tommy cannot be wrong

                        By Bartsky

                        from Vermont

                        See all my reviews

                        Verified Buyer

                        Comments about Martin FX740 SP Flexible Core Phosphor Bronze Light Acoustic Guitar Strings:

                        Good enough for Tommy, good enough for me.

                        Displaying reviews 1-20

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