SB Acoustics SB15CRC30 / Carbon

The SB Acoustics SB15CRC30  5" (13cm) 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 40 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 applications or as a pure midrange speaker. The generously ventilated 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 0.12 mH
  
• Effective membrane area, Sd 82 cm2
  
• Diameter of the voice coil 30.5 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 1.46 kg
  
• Free air resonance, Fs 37 Hz
  
• Sensitivity (2.83 V / 1 m) 88.5 dB
  
• Mechanical Q-factor, Qms 3.39
  
• Electrical Q-factor, Qes 0.36
  
• overall Q-factor, Qts 0.32
  
• Moving mass including air, Mms 10.2 g
  
• force factor, Bl 4.55 Tm
  
• Equivalent volume, VAS 17.3 liters
  
• Compliance, Cms 1.81 mm/N
  
• Mechanical loss, Rms 0.7 kg/s
  
• Nominal load capacity* 50 W
  
• * IEC 268-5, T/S parameters measured on retracted drives.

• nominal impedance 8 Ω
  
• frequency range 70Hz - 4kHz
• DC resistance, Re 5.9 Ω
  
• Inductance of the voice coil, Le 0.14 mH
  
• Effective membrane area, Sd 82 cm2
  
• voice coil diameter 30.5 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 1.46 kg
  
• Free air resonance, Fs 40 Hz
  
• Sensitivity (2.83 V / 1 m) 86 dB
  
• Mechanical Q-factor, Qms 3.52
  
• Electrical Q factor, Qes 0.46
  
• overall Q-factor, Qts 0.41
  
• Moving mass incl.air, Mms 9.8 g
  
• force factor, Bl 5.6 Tm
  
• Equivalent volume, VAS 14.9 liters
  
• Compliance, Cms 1.62 mm/N
  
• Mechanical loss, Rms 0.7 kg/s
  
• Nominal load capacity* 50 W
  
• * IEC 268-5, T/S parameters measured on retracted drives.