This Scan-speak 18W/8542-00 7" woofer features a coated paper cone that delivers very smooth and warm reproduction with excellent detailing. We recommend this driver for high quality 2-way systems of bass reflex design. This driver has the SD magnet system, magnesium cast frame, aluminum former and wire. The surround is a double coated foam material with long term stability.
Specifications
power handling (continuous/programme) = 70 W
frequency range = 30-3000 Hz
resonance frequency fs = 30 Hz
impedance R = 8 Ohm
sound pressure level SPL = 89 dB (2,83V; 1m)
DC resistance Re = 5,5 Ohm
force factor BL = 7,8 N/A
voice coil inductance L = 0,2 mH
effective piston radiating area Sd = 135 cm2
effective mechanical mass incl. air load mms = 15 g
equivalent volume of compliance Vas = 47,9 l
total Q factor Qts = 0,23 (Qms=1,7, Qes=0,26)
voice coil diameter = 42 mm
maximum peak linear excursion vibration xlin = +/- 6,5 mm
