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SC 4.7 ND - 4 Ohm

Art. No. 8047

Magnetically shielded 4 x 7 cm (1.6" x 2.8") fullrange driver with good efficiency and balanced frequency response with a clear highrange reproduction. Extremely small size due to a neodymium magnet system. Applicable as built-in speaker in TV's and PC's with very small mounting space.

Typical applications

  • Video monitoring screens
  • TVs
  • Monitoring speaker for electronic devices


  • Moisture-resistant membrane
  • metal design
  • Magnetically shielded
*Gross price for private customers. Industrial prices are available on request.
Technical Data
Amplitude & Impedance Frequency
Directivity pattern
Rated power 2 W
Maximum power 4 W
Nominal impedance Z 4 Ohm
Frequency response 220–20000 Hz
Mean sound pressure level 81 dB (1 W/1 m)
Opening angle (-6 dB) 180°/4000 Hz hor.180°/4000 Hz ver.
Excursion limit +/−0.5 mm
Resonance frequency fs 360 Hz
Magnetic induction 0.7 T
Magnetic flux 60 µWb
Height of front pole-plate 2 mm
Voice coil diameter 14 mm
Height of winding 2 mm
Cutout diameter 35 x 65 mm (oval)
Net weight 0.041 kg
D.C. resistance Rdc 3.6 Ohm
Mechanical Q factor Qms 5.42
Electrical Q factor Qes 5.81
Total Q factor Qts 2.8
Equivalent volume Vas 0.18 l
Effective piston area Sd 16 cm²
Dynamically moved mass Mms 0.6 g
Force factor Bxl 0.9 Tm
Inductance of the voice coil L 0.2 mH
Connections 4.8 x 0.5 mm (+)/2.8 x 0.5 mm (-)
Temperature range –25 ... 70 °C

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