Scan-Speak 4.5″ Illuminator Midrange 12MU/8731T00 in 8 ohm
The 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.
Under-Hung Neodymium Motor Design
One Piece Cone-Dust Cap
Very Wide Frequency Response 100-10KHz
Patented Symmetrical Drive (SD-3)
Low-Loss Linear Suspension
High Output 87dB @ 2,83V
Nominal impedance [Zn]: 8 Ω
Resonance frequency [fs]: 66 Hz
Sensitivity [2.83 V⁄1m]: 87.2 dB
Equivalent volume [Vas]: 5.8 l
Total Q factor [Qts]: 0.29
Datasheet: Datasheet 12MU/8731T00