633C
| Brand | Altec, Altec Lansing |
| Manufacturer | Altec Lansing Corporation, LTV Ling Altec, Inc., Ling-Temco-Vought, Inc |
| Function | Microphone |
| Produced | 1965 |
| Country | United States |
| Model ID | "Salt Shaker" |
| Form Factor | Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 5.1 × 5.1 × 8.9 cm (W × H × D) |
| Weight | 0.8lbs |
| Frequency Response | 35Hz-12kHz |
| Element Type | Dynamic |
| Diaphragm | Mylar |
| Directivity Pattern | Omnidirectional |
| Output Impedance | 30/50Ω, 150/250Ω (Selectable) |
| Output Level | -55dBm/10dynes/cm² |
| Finish | Instrument Gray |
| Notes | Diaphragm updated from aluminum to mylar. Output impedance increased to new industry standards. |