SB Acoustics SB12NRX25-4

SB Acoustics SB12NRX25-4 4" Woofer

• Proprietary cone material with natural fibres made in-house
• High damping Butyl rubber surround for non-resonant sound character
• 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

Specifications

• power handling (continuous/programme) = 30 W
• frequency range = 80-12000 Hz
• resonance frequency fs = 55 Hz
• impedance R = 4 Ohm
• sound pressure level SPL = 87,5 dB (2,83V; 1m)
• DC resistance Re = 3,1 Ohm
• force factor BL = 3,6 N/A
• voice coil inductance L = 0,14 mH
• effective piston radiating area Sd = 50 cm²
• effective mechanical mass incl. air load mms = 5,6 g
• equivalent volume of compliance Vas = 5,6 l
• total Q factor Qts = 0,4 (Qms=3,2, Qes=0,46)
• voice coil diameter = 25,4 mm
• mounting diameter d = 95 mm
• overall diameter d = 123 mm
• mounting depth (not countersunk) t = 60,61 mm