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ALTEC 1-Inch Driver Diaphragm

This is a Radian diaphragm for 1-inch throat drivers such as the ALTEC 802/806/808/902/604.
Made from a traditional aluminum alloy, it produces a natural sound.
The Mylar film edge reduces resonance compared to metal tangential edges, resulting in a more natural sound quality and significantly increased power handling.

Impedance: 16Ω (Set of 2)

Power Rating: 50W (Continuous)
(Generally stated as 100W.)

Radian diaphragms are all made from aluminum alloy sheets formed using a spinning technique (see photo on the left) and then specially hardened. Spinned diaphragms are thinner in the center and thicker at the periphery, as shown in the diagram below (top), resulting in increased strength for the same mass and an optimal shape for the diaphragm. A typical stamped-type diaphragm is thicker in the center, as shown in the diagram below. This shape makes a big difference in terms of resonance. Imagine pulling a rubber band with both hands and then moving them up and down. The rubber band corresponds to the diaphragm, and the hands correspond to the voice coil. With a stamped-type diaphragm, the center is heavy, so it's like having a weight attached to the middle of the rubber band. This weight moves independently of the movement of the hands. This is resonance. Resonance not only deteriorates frequency characteristics, but can also cause intermodulation distortion. A spatula-shaped diaphragm is equivalent to a tightly stretched rubber band, allowing the diaphragm to faithfully follow the movement of the voice coil. Radian's diaphragms have been proven to have minimal intermodulation distortion, even through FFT measurements. (See the measurement data below.)
The use of Mylar film edges, which eliminate unwanted reflections and resonance, also contributes to this excellent sound quality. Recently, aluminum has been reevaluated for its natural sound quality, which differs from titanium and environmentally harmful beryllium. We recommend this product to anyone dissatisfied with the sound of their new driver.

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