SB Acoustics SB16PFCR25-8 6" Woofer Vented reinforced plastic chassis Proprietary cone... more 
  Product information "SB Acoustics SB16PFCR25-8" 
 SB Acoustics SB16PFCR25-8 6" Woofer
- Vented reinforced plastic chassis
 - Proprietary cone material with natural fibers made in-house
 - Soft low damping rubber surround for improved transient response
 - Optimized motor system
 - Vented coil former for low compression
 - Non-resonant long life lead wires
 
Specifications
 - power handling (continuous/programme) = 40 W
 - frequency range = 40-12000 Hz
 - resonance frequency fs = 38 Hz
 - impedance R = 8 Ohm
 - sound pressure level SPL = 87 dB (2,83V; 1m)
 - DC resistance Re = 5.6 Ohm
 - force factor BL = 6.2 N/A
 - voice coil inductance L = 0.77 mH
 - effective piston radiating area Sd = 124 cm2
 - effective mechanical mass incl. air load mms = 13.8 g
 - equivalent volume of compliance Vas = 27 l
 - total Q factor Qts = 0.40 (Qms=2.5, Qes=0.48)
 - voice coil diameter = 25,4 mm
 - mounting diameter d = 144.5 mm
 - overall diameter d = 160.5mm
 - mounting depth (not countersunk) t = 76.7 mm
 
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