As the mechanisms of pedal steels evolved, some players devised ways to combine all of the changes of the E9th and C6th into a single 12-string neck. Called the Universal or U-12, this group of copedents typically uses a knee lever to change the string tuning from E9th to B6th (similar to C6th), and includes most of the pedals and knee levers from both necks of a D-10.
|Reece Anderson’s 12-string universal||Joe “Mac” McHam’s 12-string universal|
|Lee Baucum’s push-pull universal||Danny Naccarato’s 12-string universal|
|Carl Dixon’s ultimate universal||Michael Perlowin’s 12-string universal|
|Thijs Kappen’s 10-string universal||Sierra Instruments for 12 or 14 strings|
|Jeff Newman’s very popular 12-string universal|