Geometry in audio.

Yamaha had an amp back in the 80s I think that was shaped like a square base pyramid.

edge has pyramid shaped monoblocks.

Pentagram P-10 loudspeakers.

I think Nagra makes a pyramid-shaped DAC.

Avolon Eidolon and Radian (sp?) speakers are all kinds of trapezoidal shapes. Reference Da Capo monitors are trapezoids too--or maybe they are rhombi? [can't really remember what a rhombus is] How about Thor amps, which I think are circular? Some models of Gallo speakers are spheres. Bass traps are tall cylinders. The Ringmat is a circle. And look at all the vibration-contolling "cones" around.