A Glossary of Speaker Materials Click on a letter below to jump
to that section of the glossary. |Don't know the difference
between "Aramid" and "Titanium"? This glossary lists many of the
materials used by speaker manufacturers. Use this guide to get a
better understanding of the materials in a speaker and how they
will perform.| Polypropylene coated with a thin layer of
aluminum. The combination creates a stiff, lightweight material
used in woofer cones. A synthetic fiber with excellent strength-
to-weight properties. It can be woven into a fabric, or blended
into polypropylene to produce lightweight, weather-resistant
woofer cones that have the natural sound characteristics found
in high-quality paper cones. A rubber/butylene compound with
excellent flexibility and durability. Used for speaker
surrounds. Cast metals have a greater resistance to resonance
than stamped metals when used in speaker baskets. Cast aluminum
combines light weight with rigidity and strength. C.M.M.D.
(Ceramic Metal Matrix Diaphragm)