| Mfr. Part No. | Description |
| 850CA | Nominal Impedance (Ohms), Primary, 12/48 |
| 850EA | Nominal Impedance (Ohms), Primary, 50/200 |
| 850GA | Nominal Impedance (Ohms), Primary, 150/600 |
| 850HA | Nominal Impedance (Ohms), Primary, 150/600 |
| 850JA | Nominal Impedance (Ohms), Primary, 150/600 |
| 850LA | Nominal Impedance (Ohms), Primary, 5K/20K |
| 850NA | Nominal Impedance (Ohms), Primary, 150/600 |
| 850QA | Nominal Impedance (Ohms), Primary, 10K/40K |