WG78-1650A-PR-20-D 3-Inch Speaker Driver  The WG78-1650A-PR-20-D is a 3-inch speaker driver featuring a silver mica diaphragm and a 20 mm voice coil. It has a nominal impedance of 4 ohms, with 20 W RMS power handling and 40 W maximum power handling. Its specified frequency response is 116 Hz–10 kHz, with a sensitivity of 82 dB and a resonant frequency of 116 Hz.  Specifications:

• Model: WG78-1650A-PR-20-D

• Speaker Size: 3 inches

• Nominal Impedance: 4 Ω

• RMS Power Handling: 20 W

• Maximum Power Handling: 40 W

• Voice Coil Diameter: 20 mm

• Resonant Frequency (Fs): 116 Hz

• Sensitivity: 82 dB

• Mounting Height: 46 ± 0.5 mm

• Total Weight: 340 g

• Diaphragm Material: Silver mica diaphragm

• Frequency Response: 116 Hz–10 kHz