SB Acoustics SB12MNRX25-4

SB Acoustics SB12MNRX25-4 4" Woofer

• Proprietary cone material with natural fibres made in-house
• Shortened voice coil optimized for pure midrange reproduction
• 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) = 50 W
• frequency range = 80-15000 Hz
• resonance frequency fs = 58 Hz
• impedance R = 4 Ohm
• sound pressure level SPL = 88,5 dB (2,83V; 1m)
• DC resistance Re = 3,2 Ohm
• force factor BL = 3,7 N/A
• voice coil inductance L = 0,14 mH
• effective piston radiating area Sd = 50 cm²
• effective mechanical mass incl. air load mms = 4,9 g
• equivalent volume of compliance Vas = 5,5 l
• total Q factor Qts = 0,37 (Qms=3,6, Qes=0.42)
• voice coil diameter = 25,4 mm
• mounting diameter d = 95 mm
• overall diameter d = 123 mm
• mounting depth (not countersunk) t = 69,61 mm