Telefon-Receiver ( TR ) SD-154BH-2
| Magnet | Nd-Te-B Magnet |
| Impedance | 150±20%Ω at 1 KHz |
| Sensitivity | 93±3dB S.P.L.60mv at 1 KHz 0dB 2X 10^-5; Pa |
| MF intensity axial | ≥-19 dB at 1KHz 0 dB 1A/M |
| MF intensity radial | ≥-22 dB at 1 KHz 0 dB 1A/M |