SB20PFCS30-7

SB ACOUSTICS SB20PFCS30-7, 218mm (8in) FIBER CONE WOOFER 7 OHM.

Features

• Proprietary cone material with natural fibers made in-house
• Foam surround for maximum transparency and midrange resolution
• Large spider for improved linearity
• Vented motor system and coil former for low compression
• Vented reinforced plastic chassis
• Non-resonant long-life lead wires
• High Q design intended for sealed enclosures with series capacitor

Specs

• Nominal Impedance 7 Ω
• DC resistance, Re 5.0 Ω
• Voice coil inductance, Le 0.95 mH
• Effective piston area, Sd 222 cm²
• Voice coil diameter 30.5 mm
• Voice coil height 16 mm
• Air gap height 5 mm
• Linear coil travel (p-p) 11 mm
• Magnetic flux density 0.91 T
• Magnet weight 0.36 kg
• Net weight 0.96 kg
• Free air resonance, Fs 39 Hz
• Sensitivity (2.83V/1m) 88 dB
• Mechanical Q-factor, Qms 4.50
• Electrical Q-factor, Qes 0.77
• Total Q-factor, Qts 0.66
• Moving mass incl. air,Mms 19.6 g
• Force factor, Bl 5.6 Tm
• Equivalent volume, Vas 59.5 liters
• Compliance, Cms 0.85 mm/N
• Mechanical loss, Rms 1.07 kg/s
• Rated power handling* 40 W

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