SB Acoustics SB20FRPC30-8 Paper Fullrange 8"

Features

• 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

Specs

• Nominal Impedance 8 Ω
• DC resistance, Re 5.6 Ω
• Voice coil inductance, Le 0.30 mH
• Effective piston area, Sd 216 cm²
• Voice coil diameter 30.5 mm
• Voice coil height 16.3 mm
• Air gap height 5 mm
• Linear coil travel (p-p) 11.3 mm
• Magnetic flux density 1.2 T
• Magnet weight 0.54 kg
• Net weight 1.43 kg
• Free air resonance, Fs 39 Hz
• Sensitivity (2.83V/1m) 92 dB
• Mechanical Q-factor, Qms 3.26
• Electrical Q-factor, Qes 0.45
• Total Q-factor, Qts 0.40
• Moving mass incl. air,Mms 14.7 g
• Force factor, Bl 6.7 Tm
• Equivalent volume, Vas 73.2 liters
• Compliance, Cms 1.12 mm/N
• Mechanical loss, Rms 1.1 kg/s
• Rated power handling* 50 W

* IEC 268-5, T/S parameters measured on drive units that are broken in.