Sony SS-555 (c. 1979)
Overview
The Sony SS-555 is a passive, standmount loudspeaker system produced around 1979. Designed as a compact bookshelf speaker, it uses a 2-way, 2-speaker configuration with a bass reflex enclosure. The system was sold as a pair and was part of Sony’s high-fidelity audio offerings during the late 1970s. Known for its unique driver materials and rarity today, the SS-555 has gained attention among vintage audio enthusiasts.
Specifications
| Model Rating Method | 2-Way, 2-Speaker, Bass Reflex System, Bookshelf Type |
| Unit For low band | 16 cm cone type |
| Unit For High Frequency | 3 cm Balance Drive Type |
| Playback frequency band | 65 Hz to 20 kHz |
| Output sound pressure level | 91dB/W/m |
| Max Input | 40W |
| External dimensions | Width 220x Height 380x Depth 210 mm |
| Weight | 4.5kg |
| Type | Passive |
| Positioning | Standmount |
| Enclosure | Bass Reflex |
Design
The SS-555 uses a bass reflex enclosure design and features a woofer with CARBOCON cone material. The high-frequency driver employs Sony's original titanium diaphragm in a balance drive configuration. The speaker includes a continuously variable level control for adjusting high-frequency output.
Market
Originally priced at ¥27,000 per pair around 1979, the SS-555 is now considered a rare vintage speaker. A used pair was listed for $150 in good condition, and an original service manual has appeared on eBay, indicating collector interest.
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