The 8948A woofer is one of Usher's most popular drivers. The 8945A features a rigid yet well-damped carbon fiber/paper cone, cast aluminum frame, long-throw 42mm voice coil, resonance-free rubber surround and Symmetrical Drive motor system with multiple copper rings. This is one of the best all-around woofers for traditional 2-way bookshelf and compact floor-standing systems. 

Details: 
  • Carbon fiber/paper composite cone
  • Low-distortion motor system
  • Cast aluminum chassis 
  • High excursion capability 
  • Under-spider venting
  • Integrated mounting gasket
  • Gold-plated terminals


Specifications: 
Impedance -- 8 Ohms 
Sensitivity (2.83V/1m) -- 88dB
Frequency response -- 40-4000Hz
RMS power -- 70W
Fs -- 31Hz
Vas -- 44 L
Qms -- 1.95
Qes -- 0.32
Qts -- 0.27
Xmax -- 6mm
VC inductance (Le) -- 0.34 mH


Unit Dimensions:
Overall diameter -- 177mm (6.97")
Cutout diameter -- 156mm (6.13")
Mounting depth -- 78mm (3.07")