SB Acoustics SB12PFCR25-4

SB Acoustics SB12PFCR25-4 4" Woofer

• Vented reinforced plastic chassis
• Proprietary cone material with natural fibers made in-house
• Butyl rubber surround for smooth frequency response
• Vented motor system for low compression
• Long stroke linear suspension for improved dynamics
• Non-resonant long life lead wires

Specifications

• power handling (continuous/programme) = 30 W
• frequency range = 60-12000 Hz
• resonance frequency fs = 58 Hz
• impedance R = 4 Ohm
• sound pressure level SPL = 87,5 dB (2,83V; 1m)
• DC resistance Re = 3.1 Ohm
• force factor BL = 3.5 N/A
• voice coil inductance L = 0.26 mH
• effective piston radiating area Sd = 50 cm²
• effective mechanical mass incl. air load mms = 5.3 g
• equivalent volume of compliance Vas = 5.2 l
• total Q factor Qts = 0.43 (Qms=3.4, Qes=0.49)
• voice coil diameter = 25,4 mm
• mounting diameter d = 102 mm
• overall diameter d = 108.9mm
• mounting depth (not countersunk) t = 59 mm