M81SB

8” Mid-Range Speaker

  • 4Ω nominal impedance
  • 3.4Ω minimum impedance
  • 170W RMS capacity
  • 96 dB sensitivity
  • 97-10K Hz response
  • 38.6mm(1.5in) voice coil

M81SB faithfully restores the essence of music, delivering rich, delicate midrange details and a pure, natural tone for comfortable listening. The precisely engineered structure ensures accurate sound reproduction with expressive vocals and smooth instrumental dynamics. The efficient magnetic circuit strengthens the positioning and layering of sound, providing warm, soft midrange and exceptional clarity.

Nominal Chassis Diameter8/205 in/mm
MAX Power340 Watts
RMS Power170 Watts
Impedance4 Ohm
Resonance Frequency97 Hz
Frequency Response97-10000 Hz
Sensitivity(1W/1m)96 dB
Voice Coil Diameter1.5” / 38.6 mm
Winding materialCCAW
Magnet40 Oz

 

FS97 Hz
Vas14.4 dm3
RE3.4 ohm
Qms9.71
Qes0.52
Qts0.49
BL7.78 T/m
MMS15 grams
Xmax2.2 mm
Sd240 cm²
Efficiency2.47 %
EBP186

 

Overall Diameter8.2/208 in/mm
Bolt Cirde Diameter7.7/197 in/mm
Baffle cutout Diameter7.5/190 in/mm
Depth3.7/94 in/mm
Net Weight2.7 kgs
Shipping Weight3.2 kgs
Shipping Box23.5X23.5X13.5 cm

 

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