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★ RADIAN 1228-8 ★

ALTEC 1-inch Driver Diaphragm

This is a diaphragm manufactured by Radian for 1-inch throat drivers such as ALTEC 802/806/808/902/604.

The material is a traditional aluminum alloy, characterized by its natural sound.

The edge is made of Mylar film, resulting in less resonance than a metal tangential edge, providing a more natural sound quality and significantly increased power handling.

Impedance: 8Ω (2-piece set)

Power Handling: 50W (continuous)

(Generally, this is listed as 100W.)

All Radian diaphragms are made by forming aluminum alloy sheets using a metal spinning technique (see photo on the left) and then undergoing special heat treatment. As shown in the diagram below (above), the metal-spun diaphragm is thinner in the center and thicker around the edges, resulting in increased strength for the same mass and an optimal shape for a diaphragm. Conventional stamped diaphragms, as shown in the diagram (below), have a thicker central section. This shape makes a significant difference in terms of resonance. Imagine pulling a rubber band with both hands and then moving your hands up and down. The rubber band corresponds to the diaphragm, and your hands correspond to the voice coil. In the stamped type, the center is heavy, so it's like having a weight attached to the middle of the rubber band. And this weight moves independently of the movement of your hands. This is resonance. Resonance not only worsens the frequency response but also causes intermodulation distortion. In the spinning method, it's equivalent to the rubber band being tightly stretched, and the diaphragm faithfully follows the movement of the voice coil. Radian's diaphragms have been proven to have less intermodulation distortion in FFT measurements. (Please refer to the measurement data below.)
The use of Mylar film edges, which eliminate unwanted reflections and resonances, also contributes to this excellent sound quality. Recently, the natural sound quality of aluminum, a material that differs from titanium and beryllium (which have negative environmental impacts), has been re-evaluated. It's recommended for those dissatisfied with the sound of newer drivers.

The screws for the internal wiring, which secure the diaphragm to the black clamp ring, are made of a relatively soft metal to ensure good contact. Therefore, please use a screwdriver of the appropriate size.

Also, you don't need to tighten them too much; just tighten them enough so that the Phillips head doesn't deform.

Condition

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We offer a standard free 30 day refund or exchange policy. Items will be fully refunded only if returned in original condition.

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