String tension is an important factor that affects a guitar's tone and playability. Light-gauge and medium-gauge are both generic descriptions for the overall size of a set of strings. It helps to think of a string set as representing the sum of the tension being put on the guitar. String manufacturers might use the term "light", but there are many string sets on the market bearing that description. And they all vary in gauge and tension. A set might have different core sizes on the wound strings, thus altering the tension even if the outside diameter is the same. More commonly, though, it is the combination of different individual string sizes that causes variances in tension.

Changing the string tension can affect the playability because it alters the factory settings. If you change either the brand or the size of your strings, you might need to have your guitar set up again. It's possible that the truss rod and/or the nut and saddle will need adjustment. It is always best to consult your local repairperson for advice.

Taylor uses light-gauge strings on all Grand Concert and Grand Auditorium 6-strings. On these models, the light-gauge strings create less tension, thus enabling the top to move more freely. Strings that exert more tension can cause a smaller top to tighten up, thus adversely affecting responsiveness and tone.

We use medium-gauge strings on all Dreadnought and Jumbo 6-string Jumbo models. In these cases, the greater tension actually helps the larger tops to move. In our opinion, light strings just don't produce as much tone and volume on the bigger bodies, because they don't move the top as much.

We use light-gauge strings on our 12-string guitars, the exception being the LKSM, which can take either light or medium strings. When using a medium 12-string set on the LKSM or any other Taylor 12-string, make sure that the overall tuning is C#. Do not tune to pitch with medium strings. We designed the LKSM with scalloped bracing to complement the lower overall tuning. On the other hand, there is no reason why you can't tune any of our 12-string models down and use medium strings on them.