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SB15CAC30 / Ceramic
Technical Highlights
- Ceramic membrane, ferrite magnet, resonance frequency 30 Hz, 4/8 ohms.
- More technical details
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SB15CAC30 / Ceramic by SB Acoustics
The SB Acoustics SB15CAC30 5" (13cm) midwoofer with ceramic membrane is available in a 4 Ohm and 8 Ohm variant. The ultra-light and stiff membrane is driven by a powerful ferrite magnet. The resonance frequency around 30 Hz is well outside the usable range, allowing the driver to perform extremely linearly within the usable range and making it ideal for use in a 2-way setup or as a pure midrange driver. The generously vented centering spider optimizes the rear compression behavior to a maximum and provides additional cooling.
Features:
- Ventilated aluminum die-cast chassis for optimal strength and low compression
- Geometrically reinforced ceramic cone for optimal piston operation and reduced breakage
- Soft, lightly dampening rubber surround for improved break-in behavior
- Non-conductive glass fiber coil carrier for minimal damping
- Extended copper sleeve on the pole shoe for low inductance and low distortion
- CCAW coil for reduced moving mass
- Durable silver wires
- Ventilated pole shoe for reduced compression
Data 4 Ohm variant:
- Nominal impedance 4 Ω
- Frequency range 120Hz - 2.8kHz
- Direct current resistance, Re 3.1 Ω
- Inductance of the oscillating coil, Le 0.12 mH
- Effective membrane area, Sd 82 cm2
- Diameter of the vibrating coil 30.5 mm
- Height of the oscillating coil 15 mm
- Height of air gap 5 mm
- Linear coil stroke (p-p) 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
- Total Q factor, Qts 0.31
- Moving mass including air, Mms 11.3 g
- Power factor, Bl 4.6 Tm
- Equivalence volume, VAS 20.2 liters
- Compliance, Cms 2.12 mm/N
- Mechanical loss, Rms 0.5 kg/s
- Rated load capacity* 50 W
- * IEC 268-5, T/S-Parameter measured on retracted drives.
Data 8 Ohm variant:
- Nominal impedance 8 Ω
- Frequency range 120Hz - 2.8kHz
- Direct current resistance, Re 5.7 Ω
- Inductance of the oscillating coil, Le 0.14 mH
- Effective membrane area, Sd 82 cm2
- Winding coil diameter 30.5 mm
- Height of the oscillating coil 14 mm
- Height of air gap 5 mm
- Linear coil stroke (p-p) 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
- Total Q factor, Qts 0.38
- Moving mass including air, Mms 10.7 g
- Power factor, Bl 5.7 Tm
- Equivalence volume, VAS 17.9 liters
- Compliance, Cms 1.88 mm/N
- Mechanical loss, Rms 0.5 kg/s
- Rated load capacity* 50 W
- * IEC 268-5, T/S-Parameter measured on retracted drives.
Dimensions:


