687B
| Brand | Altec Lansing, Altec |
| Manufacturer | LTV Ling Altec, Inc. |
| Function | Microphone |
| Country | United States |
| Form Factor | Handheld / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 4.1 × 19.1 × 7.6 cm (W × H × D) |
| Weight | 1lbs |
| Frequency Response | 50Hz-15kHz |
| Element Type | Moving Coil Dynamic |
| Diaphragm | Polyester |
| Directivity Pattern | Omnidirectional |
| Output Impedance | 150/250Ω |
| Output Level | -58dBm/10dynes/cm² |
| Hum (Ref. 10⁻³ Gauss) | -120dB |
| Finish | Satin Chrome |
| MSRP (1976) | $87 |