SB-Acoustics SB15NBAC30-4 / Aluminum

FEATURES:

• Vented cast aluminum chassis for optimum strength and low compression
• Geometrically reinforced aluminum cone for optimum piston operation and reduced break-up
• Soft low damping rubber surround for improved transient response
• Non-conducting fibre glass voice coil former for minimum damping
• Extended copper sleeve on pole piece for low inductance and low distortion
• CCAW voice coil for reduced moving mass
• Long life silver lead wires
• Vented pole piece for reduced compression

SPECS:

• Nominal Impedance 4 Ω
• DC resistance, Re 3.1 Ω
• Voice coil inductance, Le 0.12 mH
• Effective piston area, Sd 82 cm2
• Voice coil diameter 30.5 mm
• Voice coil height 15 mm
• Air gap height 5 mm
• Linear coil travel (p-p) 10 mm
• Magnetic flux density 1.0 T
• Magnet weight 0.54 kg
• Net weight 1.46 kg
• Free air resonance, Fs 33 Hz
• Sensitivity (2.83 V / 1 m) 88 dB
• Mechanical Q-factor, Qms 4.4
• Electrical Q-factor, Qes 0.31
• Total Q-factor, Qts 0.29
• Moving mass incl. air, Mms 10.6 g
• Force factor, Bl 4.7 Tm
• Equivalent volume, VAS 21 liters
• Compliance, Cms 2.2 mm/N
• Mechanical loss, Rms 0.5 kg/s
• Rated power handling* 50 W

* IEC 268-5, T/S parameters measured on drive units that are broken in.

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