Tempest
| Brand | ESS |
| Manufacturer | Electrostatic Sound Systems, Inc. |
| Function | Speaker |
| Produced | 1972-1975 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 39.4 × 68.6 × 31.1 cm (W × H × D) |
| Frequency Response | 35Hz-18kHz ±4dB |
| Treble | 4" Paper Cone |
| Midrange/Bass | 12" Paper Cone |
| Crossover Frequency | 1.5kHz |
| THD (80Hz-18kHz, 90dB) | <1.5% |
| Recommended Amplifier Power (RMS) | >20W |
| Power Handling (Peak) | 200W |
| Enclosure Type | Bass Reflex |
| Enclosure Construction | Particleboard |
| Finish | Oiled Walnut, Rosewood |
| MSRP (1975) | $139 (Rosewood: $159) |