Pioneer's highly successful basalt rock speaker technology introduced in 2008 is integrated into its popular line of TS-A series speakers .

ENGADGET: Pioneer rolls out new in-car lineup: CD players, amps, speakers, oh my!

The sand is very probably just the product of weathered basalt, the ubiquitous volcanic rock on Mars' surface.

BBC: Nasa's Curiosity Mars rover to scoop sand sample

The slim subwoofers, available in the 10- and 12-inch and 2- and 4-Ohm versions, get the rock treatment as well, utilizing basalt fibers to increase rigidity to its proprietary Air Suspension cones.

ENGADGET: Pioneer rolls out new in-car lineup: CD players, amps, speakers, oh my!