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Notes: This double neck was used live on the Steve Vai European tour of 2001, and long ago on the Mr. Big "Hey Man" tour. It's upper neck is tuned B E A D like the Ultra Bass and was the original trial version of that tuning on a standard neck for me. The second or lower neck is tuned standard (EADG). It has a toggle switch to choose either or both necks. Since my basses have 2 outputs, I need 2 wireless units to transmit my signal in a live performance. Adding that onto this already extra heavy bass made it weigh about 20 pounds! It still was well balanced, played easily, and sounded great live.