The SB Acoustics SB15NBAC30-4 is a 5 inch 4 ohm midwoofer featuring a black aluminium cone and a vented cast alloy chassis. The rigid cone has pressed geometric reinforcement troughs that suppress ringing / breakup modes offering extended pistonic action, this results in a much wider usable response than normally found with metal coned drive units.
Also available in 8 ohms: SB15NBAC30-8.
Vented cast aluminium 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.
Resonant frequency (fs)
Nominal impedance (Zn)
Mechanical Q factor (Qms)
DC resistance (Re)
Electrical Q factor (Qes)
Max power handling
Total Q factor (Qts)
Equivalent volume (Vas)
Here's the full datasheet:
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