20 cm (8") High-End woofer with black glass fibre cone, solid aluminium die-cast basket and elastic rubber surround. Designed for multi-purpose applications due to 2 x 4 ohms double voice-coil, with excellent properties as 8 ohms drivers in series configuration. The long stroke voice-coil in conjunction with the extended rear pole plate, the vented damper, the vented magnet and the capton voice-coil carrier guarantees long strokes and highest power handling.
Possible connections: (1) one voice coil not connected (2) both voice coils in series (3) both voice coils in parallel
Specifications (one coil)
power handling (continuous/programme) = 120/180 W
frequency range = -8000 Hz
resonance frequency fs = 34 Hz
impedance R = 4 Ohm
sound pressure level SPL = 85 dB (2,83V; 1m)
DC resistance Re = 2,9 Ohm
force factor BL = 4,6 N/A
voice coil inductance L = 0,4 mH
effective piston radiating area Sd = 214 cm2
effective mechanical mass incl. air load mms = 25 g
equivalent volume of compliance Vas = 62 l
total Q factor Qts = 0,77 (Qms=4,51, Qes=0,93)
voice coil diameter = 38 mm
maximum peak linear excursion vibration xlin = +/- 10 mm
mounting diameter d = 190 mm
overall diameter d = 222 mm
mounting depth (not countersunk) t = 96 mm
mass m = 2,5 kg
Specifications (2 coils in series)
power handling (continuous/programme) = 120/180 W
frequency range = -8000 Hz
resonance frequency fs = 30 Hz
impedance R = 8 Ohm
sound pressure level SPL = 88 dB (2,83V; 1m)
DC resistance Re = 5,8 Ohm
force factor BL = 9,2 N/A
voice coil inductance L = 1,1 mH
effective piston radiating area Sd = 214 cm2
effective mechanical mass incl. air load mms = 25 g
equivalent volume of compliance Vas = 68 l
total Q factor Qts = 0,34 (Qms=4,12, Qes=0,37)
voice coil diameter = 38 mm
maximum peak linear excursion vibration xlin = +/- 10 mm
