Highlights:

• High Xmax with +-3mm
• Optimized bamboo cone with rubber surround
  
• Low 2nd, 3rd distortion design
  
• Underhung voice coil
• Extremely low harmonic distortion
• Durable rubber surround
• Very high efficiency with 89 dB 1W/1m
• Very high maximum linear excursion (Xmax) of 5.0 mm
• Neodymium drive

Features:

• 4" (10cm) midrange / full range driver
• Power consumption (RMS) 25 watts
  
• Power handling (max) 50 Watt
• Impedance 8 Ohm
  
• Frequency response 75 to 20,000 Hz
• Sensitivity 89 dB 1W/1m
  
• Voice coil diameter 1"

Parameters:

• Resonant frequency (Fs) 75 Hz
• DC resistance (Re) 6.8 Ohm
  
• Voice coil inductance (Le) 0.01 mH
• Mechanical Q (Qms) 1.29
  
• Electromagnetic Q (Qes) 0.49
• Total Q (Qts) 0.35
  
• Equivalent volume (Vas) 0.21 ft.³
• BL Product (BL) 4.7 Tm
  
• Diaphragm Mass Inc. air load (Mms) 3.49g
• Maximum linear deflection (Xmax) 3 mm

Dimensions:

• Overall outer diameter 4.28 "
• Baffle cutout diameter 3.7"
  
• Depth 2.63"
• Mounting holes 4

Housing recommendations:

• Sealed volume 0.05 ft.³.
• Sealed F3 169 Hz
  
• Vented volume 0.11 ft.³
• Vented F3 98 Hz