I bought a used harley benton 6 string bass, and it has two double action truss rods. I want to straighten the neck(it is bowed, strings are way too high), but the
Harley Benton BZ-6000 NT 6 String Bass Guitar | Reverb
Harley Benton B-650FL BK Progressive Series – Thomann United States
Six String Bass? | TalkBass.com
Harley Benton B-650FL BK Progressive Series – Thomann United States