WR-4 4" Midrange
 Mounting Depth
 104mm (4.1")
  51mm (2.0")
  46mm (1.8")
  96mm (3.8")
 Power Handling (RMS)  150 Watts
 Transient Power (10ms)  800 Watts
 Voice Coil  54mm (2.1")
 hexagaonal shaped aluminum
 aluminum former
 Come  Damped Polymer Composite 
 Magnetic System  Neodymium
 Frequency Response  55 - 6,200 Hz
 Resonant Frequency (FS)  69 Hz
 Sensitivity 1 watt/m  89.5 dB
 Nominal Impedance (Z)
 4 Ohms
 DC Resistance (RE)   3.2 Ohms
 Mechanical Q Factor (QMS)  1.98
 Total Q Factor (Q/T)  0.52
 Equivalent Cas Air Load (VAS)   2.72 liters
 Net Weight  0.4 Kg (0.9 lbs)
The WR-4 can be used as either a midrange or midbass driver.  It can be crossed as low as 80 Hz or as high as 5,5500 Hz.  This unusual driver uses a 2.1" diameter voice coil on a 4" cone.  The powerful neodymium magnet system is vented for and open sound and the hexagonal shaped aluminum voice coil wire allows for high power handling.

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