30 cm (12") high-end woofer with a black cellulose diaphragm, large-format magnet arrangement and a massive aluminium diecast basket. Thanks to the multiple venting of the voice coil (pole piece hole, holes in the pole piece plate, cutouts in the aluminium diecast cone to vent the spider from behind) losses and flow noise are minimised. The combination of the voice coil carrier made of capton and the large 65 mm voice coil allow extremely high volume levels.
Specifcations
power handling (continuous/programme) = 300/600 W
frequency range = -4000 Hz
resonance frequency fs = 25 Hz
impedance R = 8 Ohm
sound pressure level SPL = 90 dB (2,83V; 1m)
DC resistance Re = 5,4 Ohm
force factor BL = 16,5 N/A
voice coil inductance L = 1,7 mH
effective piston radiating area Sd = 510 cm2
effective mechanical mass incl. air load mms = 92 g
equivalent volume of compliance Vas = 160 l
total Q factor Qts = 0,28 (Qms=4,59, Qes=0,30)
voice coil diameter = 65 mm
maximum peak linear excursion vibration xlin = +/- 16 mm
