I have been using Martin strings since 1968. Their quality is consistent and it is what they use at the factory. What more could I ask for?
For years I’ve been a faithful John Pearse phospher bronze user. Last fall I bought a Martin D-15 Streetmaster. It’s my favorite guitar I’ve ever owned (I’ve owned two other Martins over the years...always used John Pearse on them). Anyway, I absolutely love the tone of my Streetmaster, so I thought “wow, just think how it will be even better when I string it up with some John Pearse”, which eventually I did. I was disappointed! On the Streetmaster they didn’t sound as good as the Martin SP’s that came on it. They were too bright. Maybe it’s that the D-15 Streetmaster is an all mahogany guitar, which is so warm and balanced, but whatever it is the Martin SP’s give just the sound I want. Needless to say, I’ve switched back to the Martin SP phospher bronze!
I've used Martin PB strings on both of my guitars for years, love the sound not to mention the price!
My recently acquired D18 (2013) came strung with Martin Acoustic SP's (54-12) - it had been set up for this gauge. On my D28 I use Monel's (56-13) and love those. Anyway, after playing the D18, I fell in love with the SP strings. People talk about the fact that they don't break! - what I like about them is how they feel and their sound. The 54-12 gauge is really interesting, sitting between the Medium and Light gauge of most manufacturers. I'm going to sit on these for a while and see how the story develops. So far I love them!!
These are excellent strings. I've played about once a day for a month and these strings still have the same tone. Long-lasting with great tone!