C.F. Martin Acoustic Guitar Six String Phosphor Bronze Light 3-Pack, .012 - .054, MSP-4100PK3star rating 5Dave PughAugust 14, 2009I recently purchased the C.F Martin SP's. I have had them on about 2 months they have an amazing sound. I have a Blueridge BR60 and the tone with those strings are awsome. I am going to put them on my Alvarez MD60C when I change those strings out. Keep up the good work Martin. Thanks Dave