The factory standard tuning for Sierra 12 and 14 string single neck instruments is the E9/B6 Universal. This tuning provides the versatility of a typical 10 string double neck (E9 and C6) in a single neck instrument. A vertical lock lever on the left knee lowers the high and middle E strings half a step, effectively changing the base tuning from E9 to B6.
LKL LKV lock LKR 1 2 3 4 5 6 7 8 RKL RKR
1 .013 F# _____+G_____________________________+G________________________
2 .015 D# ___________________________________________________________-D_
3 .011 G# ________________________+A____________________________________
4 .014 E _+F______-Eb__-Eb___________+F#_________+E____________________
5 .018 B ____________________+C#_____+C#_____________+C#_______-Bb_____
6 .022 G# ________________________+A______+A#_________+A#_______________
7 .026 F# _____+G_____________________________-F________________________
8 .030 E _+F______-Eb__-Eb_______________________-D____________________
9 .038 B ____________________+C#_________________________+C____-Bb__+D_
10 .046 G# ________________________+A______+A#___________________________
11 .056 E ____________________________________+F__________-D#___________
12 .068 B ____________________________________+C#_________-G#___________ The player typically shifts his foot position to work pedals 4 thru 8 when the B6 lock lever is engaged. Note that the change on pedal 6 assumes that the E's have been lowered by the lock lever.
Sierra's 14 string steels are shipped with the same tuning. A high G# (.012) is added as string #1, and a low E (.080) is string #14. No changes are attached to the additional strings.