| APM-TEC | Diameter (mm) | Height (mm) | Impedance (Ω) | Fundamental Frequency (Hz) | Frequency range F0 – (Hz) | Power rating (Rated / Max) (W) | *Sound Output (dB) | Frame Material | Diaphragm |
| APM-L40.504C-2W | 40.5 | 18.3 | 4 | 320 | 20 | 2.0 / 3.0 | 88 ± 3 | Metal | Cloth+Al |
*Tested at 0.5m 1W 0.6K 0.8K 1K 1.2KHz average
