21PW1400FE BEYMA 21" 1400 W 4" VOICE COIL NEW

BRAND NEW 21PW1400FE BEYMA 21" 1400 W 4" VOICE COIL High power handling: 1400 W Malt Cross Cooling System Low power compression looses High sensitivity: 98,5 dB FEA optimized ferrite magnetic circuit Designed with MMSS technology for high control, linearity and low harmonic distortion Optimized nonlinear parameters Waterproof cone with treatment for both sides of the cone 4" DUO double layer inner/outer voice coil Aluminium demodulating ring Extended controlled displacement: Xmax ± 10 mm Massive mechanical displacement capability: Xdamage ± 55 mm Resonant frequency 30 Hz Electrical Q 0.36 Mechanical Q 7.40 Total Q factor 0.34 Suspension equivalent air volume 401.5 litres DC resistance 5.2 Ω Minimum impedance 5.4 Ω Voice coil inductance 1.3 mH Force factor 28.2 T·m Suspension mechanical resistance 7.51 N·s/m Suspension mechanical compliance 94 µm/N Moving mass 247.7 g Moving mass (including airload) 298 g Surface of the diaphragm 1734 cm² Effective diaphragm diameter 47 cm Maximum