Home Products Beryllium Products Truextent Acoustic Beryllium TRUEXTENT®: ACOUSTIC BERYLLIUM FOR SUPERIOR SPEAKER DOMES AND CONES Materion’s Truextent is a premium acoustic beryllium foil used to make domes and cones for high-end speakers and audio equipment. Recognized around the world by OEMs and ODMs, Truextent foil creates superior speaker domes and cones for crystal-clear sound reproduction. Using beryllium for acoustic components eliminates the ringing and distortion of traditional materials like titanium or aluminum. Truextent is available in cones and domes for speakers and headphones. Our advanced acoustic domes and cones are used to make high frequency drivers, capable of reproducing sound beyond an extra octave of useable, non-resonant high-frequency energy. And, sounds reproduced by Truextent speaker domes travel 2.5 times faster than the sounds from aluminum or titanium domes. (Truextent reproduces sound at 12,945 m/s.) Look at the technical comparison of Truextent beryllium with tradition materials. TRUEXTENT® HIGH CLARITY SPEAKER DOMES Watch this video of a laser scan of a Truextent beryllium dome compared to scans of aluminum and titanium domes. GENUINE BERYLLIUM ADVANTAGES We use a unique method to produce Truextent material. Beryllium metal is rolled numerous times into a thin foil. This process creates a highly uniform grain structure, unlike physical vapor deposition (PVD), a process used by other companies that make acoustic beryllium. Rolled beryllium foil has increased durability when compared to PVD. Beryllium foil has an extremely high stiffness-to-mass ratio, allowing our domes and cones to have: Increased durability of the grain structure Fewer mechanical deformations under stress Higher damping for distortion-free sound Extra usable octave of high frequency sound Greater responsiveness due to low mass Truextent domes and cones are available in a range of sizes. Our engineering team can collaborate with you to provide the finest sounding domes and cones for tweeters, HiFi midrange, woofers, compression drivers and high-end headphones. TRUEXTENT® FORMS: We produce speaker domes with and without surrounds from our library of standard geometries. Our Truextent forms include: Custom fabricated speaker domes Custom fabricated speaker cones Custom Speaker cones for headphones See a comparison of beryllium tuning forks and traditional materials. TRUEXTENT® WHITE PAPER We presented a whitepaper at ALMA European Symposium, comparing Truextent beryllium acoustic speaker domes with titanium and aluminum domes. Truextent advanced acoustic domes and cones reproduced fewer distortions and higher frequency sound and increased durability. Download the white paper For more information on Truextent acoustic beryllium, talk with our engineering team.