The Scan-Speak 12MU/4731T-00 Illuminator woofers are based on compact under-hung motor systems with large neodymium ring magnets. The patent pending motor offers a very long linear excursion together with a very high force factor. The top plate is shaped to “guide” the backside airflow around the motor and with the very open cast aluminum chassis design the driver is virtually free from compression.
The under-hung voice coil is precision wound with CCAW ribbon wire on a titanium bobbin for a low loss yet high power handling design. The vented pole piece has contoured openings to eliminate any hint of turbulence noise. The uniquely shaped top plate and open air frame ensure there is virtually no dynamic compression caused by restriction of the diaphragm back wave.
Neodymium magnet
Under hung motor system
One piece cone and dust cap, full cone technology
Very Wide Frequency Response 100-10KHz
Patented Symmetrical Drive (SD-3)
Low-loss Linear Suspension
Foam surround
High Output 90dB @ 2,83V
Specifications
power handling (continuous/programme) = 80/150 W
frequency range = 70-6000 Hz
resonance frequency fs = 64 Hz
impedance R = 4 Ohm
sound pressure level SPL = 90 dB (2,83V; 1m)
DC resistance Re = 3,1 Ohm
force factor BL = 5,1 N/A
voice coil inductance L = 0,11 mH
effective piston radiating area Sd = 58 cm2
effective mechanical mass incl. air load mms = 5,4 g
equivalent volume of compliance Vas = 5,4 l
total Q factor Qts = 0,24 (Qms=3,64, Qes=0,26)
voice coil diameter = 32 mm
maximum peak linear excursion vibration xlin = +/- 3,5 mm
