SB Acoustics SB20FRPC30-8

SB Acoustics SB20FRPC30-8 8" Fullrange

• Proprietary cone material with natural fibers made in-house
• Light weight foam surround
• Optimized whizzer cone for smooth high frequency extension
• Phase plug for controlled radiation
• Large spider for improved linearity
• Optimized motor system
• Vented reinforced plastic chassis
• Non-conductive coil former
• Long life lead wires
• Extended copper sleeve on pole piece

Specifications

• resonance frequency fs = 39,4 Hz
• impedance R = 8 Ohm
• sound pressure level SPL = 92 dB (2,83V; 1m)
• DC resistance Re = 6 Ohm
• force factor BL = 7,15 N/A
• voice coil inductance L = 0,22 mH
• effective piston radiating area Sd = 216 cm²
• effective mechanical mass incl. air load mms = 16,3 g
• equivalent volume of compliance Vas = 66,3 l
• total Q factor Qts = 0,45 (Qms=10,1, Qes=0,47)
• voice coil diameter = 30,5 mm
• maximum peak linear excursion vibration x_lin = +/- 4,1 mm
• mounting diameter d = 187 mm
• overall diameter d = 218 mm
• mounting depth (not countersunk) t = 94,3 mm