SB ACOUSTICS-NRX/ 4″ SB12NRXF25-4
Proprietary cone material with natural fibres made in-house
Foam surround for maximum transparency and midrange resolution
Vented pole piece for reduced compression
Vented cast aluminium chassis for optimum strength and low compression
CCAW voice coil for reduced moving mass
Long life silver lead wires
Non-conducting fibre glass coil former for minimum damping