Stuart & Sons uses Australian timbers for construction. The Dutch-Australian pianist
and teacher Gerard Willems used a Stuart & Sons piano when recording the complete piano sonata cycle of
Ludwig van Beethoven during 1999 and 2000. Stuart & Sons created a grand piano with 14 more keys than are found on a standard piano, for a total of 102 keys (C0 to F8) or eight and one half octaves. A model with 20 extra keys (108 keys in total, 9 octaves,
C0 to
B8, approximately 16.4 Hz to 7902.1 Hz) was built in 2018. ==Piano locations==