Shank: Large (Large shank) – suitable for trombones with large bore
Main Features:
Cup: Extra-large (larger than 3AL or 4AL) – provides maximum sound volume and strong projection
NAL = "New York style AL" – variant with slightly different characteristics compared to the standard AL series, preferred for projection and versatility
Heritage Design:
Thinned edges for free vibration and quick attack
Redistributed mass for tonal stability in the low register
Suitable for:
Professional trombonists looking for a full, round, and very powerful sound
Symphonic repertoire, opera, solo or brass ensemble