What is the difference between Black TUSQ XL and a TUSQ nut?Updated 2 months ago

The biggest difference is that Black TUSQ XL is impregnated with PTFE; the lubrication prevents strings from binding in the slots. TUSQ is not. You get better tuning stability, especially when using a tremolo or bending strings. Black TUSQ XL also has more of a midrange boost as compared to TUSQ.