Formica, acrylic, aluminum, brass, and steel.
Lowest bar:Third G below middle C.
Highest bar:A below middle C.
The Bass Marimba is by far the largest and most powerful
instrument I have built.It is over 12 feet long, and all of the 24
exceptionally large bars are made of Honduras rosewood.
This instrument has 19 standard wavelength resonators and 5
reason for the cavity resonators is that extremely low
frequencies require extremely long tubes, which in turn would
require a high stand for the instrument and a high riser for
the musician to stand on.
In all 24 bars on the Bass Marimba, I tuned the first three
modes of vibration to produce exact harmonic ratios 1:4:8 in
above the fundamental or first mode of vibration, the second
mode sounds the interval of the double-octave, frequency ratio
4/1; and the third mode sounds the interval of the
triple-octave, frequency ratio 8/1. I developed this tuning
technique because in low-sounding bars the higher modes of
vibration are clearly audible.