SB Acoustics SB15CAC30 / Ceramic

The SB Acoustics SB15CAC30 5" (13cm) woofer with ceramic  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.

• Ventilated cast aluminum chassis for optimal strength and low compression
  
• Geometrically reinforced ceramic cone for optimal piston operation and reduced breakage
  
• Soft, low-damping rubber surround 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 120Hz - 2.8kHz
• 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 15 mm
  
• height of the air gap 5 mm
  
• Linear coil stroke (pp) 10 mm
  
• Magnetic flux density 1.0 T
  
• Weight of the magnet 0.54 kg
  
• net weight 1.46 kg
  
• Free air resonance, Fs 32.5 Hz
  
• Sensitivity (2.83 V / 1 m) 88 dB
  
• Mechanical Q-factor, Qms 4.61
  
• Electrical Q-factor, Qes 0.34
  
• overall Q-factor, Qts 0.31
  
• Moving mass including air, Mms 11.3 g
  
• force factor, Bl 4.6 Tm
  
• Equivalent volume, VAS 20.2 liters
  
• Compliance, Cms 2.12 mm/N
  
• Mechanical loss, Rms 0.5 kg/s
  
• Nominal load capacity* 50 W
  
• * IEC 268-5, T/S parameters measured on retracted drives.

• nominal impedance 8 Ω
  
• frequency range 120Hz - 2.8kHz
• DC resistance, Re 5.7 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 14 mm
  
• height of the air gap 5 mm
  
• Linear coil stroke (pp) 10 mm
  
• Magnetic flux density 1.0 T
  
• Weight of the magnet 0.54 kg
  
• net weight 1.46 kg
  
• Free air resonance, Fs 35.5 Hz
  
• Sensitivity (2.83 V / 1 m) 86 dB
  
• Mechanical Q-factor, Qms 4.77
  
• Electrical Q-factor, Qes 0.42
  
• overall Q-factor, Qts 0.38
  
• Moving mass incl.air, Mms 10.7 g
  
• force factor, Bl 5.7 Tm
  
• Equivalent volume, VAS 17.9 liters
  
• Compliance, Cms 1.88 mm/N
  
• Mechanical loss, Rms 0.5 kg/s
  
• Nominal load capacity* 50 W
  
• * IEC 268-5, T/S parameters measured on retracted drives.