SB Acoustics SB17CRC35 / Carbon

The SB Acoustics SB17CRC35 6.5" (16.5cm) woofer with glossy carbon  Rohacell®  Membrane is available in a 4 ohm and 8 ohm version. The ultra-light and stiff membrane is driven by a powerful ferrite magnet. The resonance frequency of around 30 Hz is far outside the usable range, which means that the driver is extremely linear in the usable range and can be used optimally in 2-way use or as a pure midrange speaker. The generously ventilated centering spider optimizes the rear compression behavior to a maximum and provides additional cooling.

• Rohacell® /Carbon fiber sandwich membrane for optimized ratio of stiffness and damping
  
• Ventilated cast aluminum chassis for optimal strength and low compression
  
• Rubber surround with low damping for improved transient response
  
• Non-conductive glass fiber voice coil former for minimal damping
  
• Extended copper sleeve on the pole piece for low inductance and low distortion
  
• CCAW voice coil for reduced moving mass
  
• Durable silver wires
  
• Ventilated pole piece for lower compression

• nominal impedance 4 Ω
  
• frequency range 70Hz - 4kHz
• DC resistance, Re 3.1 Ω
  
• Inductance of the voice coil, Le 0.13 mH
  
• Effective membrane area, Sd 118 cm2
  
• Diameter of the voice coil 35.5 mm
  
• Height of the voice coil 16 mm
  
• height of the air gap 5 mm
  
• Linear coil stroke (pp) 11 mm
  
• Magnetic flux density 1.0 T
  
• Weight of the magnet 0.54 kg
  
• net weight 1.56 kg
  
• Free air resonance, Fs 31.5 Hz
  
• Sensitivity (2.83 V / 1 m) 90 dB
• Mechanical Q-factor, Qms 4.32
  
• Electrical Q factor, Qes 0.35
  
• overall Q-factor, Qts 0.32
  
• Moving mass including air, Mms 14.2 g
  
• force factor, Bl 5.0 Tm
  
• Equivalent volume, VAS 35.5 liters
  
• Compliance, Cms 1.80 mm/N
  
• Mechanical loss, Rms 0.65 kg/s
  
• Nominal load capacity* 60 W
  
• * IEC 268-5, T/S parameters measured on retracted drives.

• nominal impedance 8 Ω
  
• frequency range 70Hz - 4kHz
• DC resistance, Re 5.7 Ω
  
• Inductance of the voice coil, Le 0.15 mH
  
• Effective membrane area, Sd 118 cm2
  
• voice coil diameter 35.5 mm
  
• Height of the voice coil 16 mm
  
• height of the air gap 5 mm
  
• Linear coil stroke (pp) 11 mm
  
• Magnetic flux density 1.0 T
  
• Weight of the magnet 0.54 kg
  
• net weight 1.56 kg
  
• Free air resonance, Fs 28 Hz
  
• Sensitivity (2.83 V / 1 m) 87 dB
  
• Mechanical Q-factor, Qms 3.90
  
• Electrical Q-factor, Qes 0.37
  
• overall Q-factor, Qts 0.34
  
• Moving mass incl.air, Mms 13.3 g
  
• force factor, Bl 6.0 Tm
  
• Equivalent volume, VAS 48 liters
  
• Compliance, Cms 2.43 mm/N
  
• Mechanical loss, Rms 0.6 kg/s
  
• Nominal load capacity* 60 W
  
• * IEC 268-5, T/S parameters measured on retracted drives.