The SB Acoustics SB15NRX2C30-8 is a 5 inch 8 ohm midwoofer featuring a Norex cone and a vented cast aluminium chassis. Norex is a proprietary paper based material comprised of wood pulp and selected natural fibres blended for an optimally strong but lightweight cone that gives detailed sound with good midrange extension.
Also available in 4 ohms: SB15NRX2C30-4.
Norex proprietary cone material with natural fibres made in-house.
Soft low damping rubber surround for improved transient response
Vented cast aluminium chassis for optimum strength and low compression.
Vented pole piece for reduced compression.
CCAW voice coil for reduced moving mass.
Non-conducting fibre glass coil former for minimum damping.
Long life silver lead wires.
Extended copper sleeve on pole piece for low inductance and low distortion.
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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