M 312 III STR
| Brand | Acutex |
| Manufacturer | Acutex USA International |
| Function | Turntable Cartridge |
| Produced | 1978 |
| Model ID | 312 III STR |
| Form Factor | ½" Standard Mount |
| Signal Path | Analog Hardware |
| Dimensions | 1.8 × 1.7 × 2.9 cm (W × H × D) |
| Weight | 6.2g |
| Frequency Response | 20Hz-35kHz (20Hz-20kHz ±1.0dB) |
| Output Voltage | 4.0mV |
| Channel Separation (1kHz) | 30dB |
| Channel Separation (10kHz) | 27dB |
| Channel Balance (1kHz) | 1.0dB |
| IMD (+6dB) | 1.3% |
| Trackability (10kHz) | 32cm/sec |
| Compliance (100Hz) | 32x10⁻⁶cm/dyne |
| Tracking Force Range | 1.2-2.5g |
| Pressure Tracking | 0.5-1.2g |
| Stylus Type | STR (0.3x1.6x0.6mil) |
| Body Color | Grey/Red |