M 320 III STR Improved
| Brand | Acutex |
| Manufacturer | Acutex USA International |
| Function | Turntable Cartridge |
| Produced | 1978 |
| Model ID | 320III STR |
| Form Factor | ½" Standard Mount |
| Signal Path | Analog Hardware |
| Dimensions | 1.8 × 2.9 × 1.7 cm (W × H × D) |
| Weight | 6.2g |
| Frequency Response | 20Hz-45kHz |
| Output Voltage (1kHz, 5cm/sec) | 3.8mV |
| Impedance (1kHz) | 2.7kΩ |
| DC Resistance | 610Ω |
| Channel Separation (1kHz) | 32dB |
| Channel Separation (10kHz) | 29dB |
| Channel Balance (1kHz) | 1dB |
| Recommended Load Resistance | 30-100k |
| Compliance (100Hz) | 42x10⁻⁶cm/dyne |
| Tracking Force Range | 0.8-1.8g |
| Body Color | Black |
| MSRP (1978) | $175 |