Sony SS-RX3
Bookshelf speaker from Sony's RX series. Three-way bass-reflex design, POM whisker-reinforced drivers and a 2.5 cm soft dome tweeter.
Overview
The Sony SS-RX3 is a bookshelf speaker from Sony's RX series. It is a three-way, three-speaker bass-reflex system. A 20 cm cone woofer handles the low end, a 7 cm cone midrange driver covers the middle, and a 2.5 cm soft dome tweeter takes the highs. It was priced at ¥33,000 per unit around 1983.
Specifications
| Enclosure Type | Bass-reflex |
| Speaker Units | 200 mm cone type (woofer), 70 mm cone type (midrange), 25 mm soft dome type (tweeter) |
| Impedance | 6 Ω |
| Rated Maximum Input | 75 W |
| Instantaneous Maximum Input | 150 W |
| Output Sound Pressure Level | 91 dB/W/m |
| Playback Frequency Band | 38 Hz – 25,000 Hz |
| Crossover Frequencies | 1.2 kHz, 7 kHz |
| Dimensions (approx.) | 285 x 515 x 280 mm (W x H x D) |
| Weight (approx.) | 10.5 kg |
Design
The SS-RX3 uses three drivers. The woofer cone shape was optimized with NASTRAN analysis, and the cone is paper with POM (polyoxymethylene) whiskers. The material was developed with Japan's Fiber and Polymer Materials Research Institute. The midrange diaphragm combines POM whiskers and polyolefin resin, which gives it high rigidity and low mass. The 2.5 cm soft dome tweeter has an integrally molded flexible film diaphragm to reduce distortion. The magnetic circuit uses a large magnet and a slotted yoke, again to keep distortion down. The driver rides on a urethane edge and a high-linearity damper.
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