SB Acoustics SB23CACS45 / Ceramic
8" (20cm) bass-midrange driver
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/piece
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Description
The SB Acoustics SB23CACS45 8" (20cm) bass/midrange driver with ceramic/ceramic cone is available in a 4 Ohm and 8 Ohm version. The ultra-light and rigid cone is driven by a powerful ferrite magnet. The resonance frequency around 30 Hz is well outside the useful range, which means that the driver plays extremely linearly in the useful range and is ideal for 2-way use or as a pure midrange driver. The generously ventilated centring spider optimizes the rear compression behaviour to a maximum and provides additional cooling.
Features :
- Soft rubber surround with low damping for improved transient response
- Geometrically reinforced ceramic diaphragm for improved resolution control
- Short-circuit ring in the motor system for reduced distortion
- Ventilated pole piece for reduced compression
- Ventilated cast aluminum chassis for optimum strength and low compression
- Flat design
- Non-conductive glass fiber voice coil former for minimal attenuation
- CCAW voice coil for reduced moving mass
- Durable silver wires
Data 4 Ohm variant
- Nominal impedance 4 Ω
- Frequency range 70Hz - 2kHz
- Direct current resistance, Re 3.3 Ω
- Inductance of the voice coil, Le 0.27 mH
- Effective diaphragm area, Sd 216 cm2
- Diameter of the voice coil 45.5 mm
- Height of the voice coil 19 mm
- Height of the air gap 6 mm
- Linear coil stroke (p-p) 13 mm
- Magnetic flux density 0.86 T
- Weight of the magnet 0.8 kg
- Net weight 2.7 kg
- Free air resonance, Fs 23 Hz
- Sensitivity (2.83V/1m) 90 dB
- Mechanical Q-factor, Qms 6.0
- Electrical Q-factor, Qes 0.35
- Total Q-factor, Qts 0.33
- Moving mass incl. air, Mms 33 g
- Force factor, Bl 6.7 Tm
- Equivalent volume, Vas 95 liters
- Compliance, Cms 1.43 mm/N
- Mechanical loss, Rms 0.8 kg/s
- Nominal load capacity* 60 W
- * IEC 268-5, T/S parameters measured on retracted drives.
Data 8 Ohm variant
- Nominal impedance 8 Ω
- Frequency range 70Hz - 2kHz
- Direct current resistance, Re 5.6 Ω
- Inductance of the voice coil, Le 0.60 mH
- Effective diaphragm area, Sd 216 cm2
- Voice coil diameter 45.5 mm
- Height of the voice coil 19 mm
- Height of the air gap 6 mm
- Linear coil stroke (p-p) 13 mm
- Magnetic flux density 0.86 T
- Weight of the magnet 0.8 kg
- Net weight 2.7 kg
- Free air resonance, Fs 25 Hz
- Sensitivity (2.83 V / 1 m) 87.5 dB
- Mechanical Q-factor, Qms 5.41
- Electrical Q-factor, Qes 0.44
- Total Q-factor, Qts 0.40
- Moving mass incl. air, Mms 31. g
- Force factor, Bl 7.9 Tm
- Equivalent volume, VAS 87 liters
- Compliance, Cms 1.31 mm/N
- Mechanical loss, Rms 0.9 kg/s
- Rated load capacity* 50 W
- * IEC 268-5, T/S parameters measured on retracted drives.
Dimensions
Download data sheet
