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.

Driver Highlights: Neo magnet, Under hung motor system, exceptionally long linear stroke.

Scanspeak Illuminator 15WU/4741T00 5.25" Midwoofer

Electrical Data
Nominal Impedance Zn 4 ohm
Minimum Impedance Zmin 4.7 ohm
Maximum Impedance Zo 41.3 ohm
DC Resistance Re 3.2 ohm
Voice Coil Inductance Le 0.5 mH

TS Parameters
Resonance Frequency fs 34 Hz
Mechanical Q factor QMS 3.47
Electrical Q factor QES 0.25
Total Q factor Qts 0.23
Force Factor Bl 6 Tm
Mechanical Resistance Rms 0.8 Kg/s
Moving Mass Mms 13 g
Suspension Compliance Cms 1.69 mm/N
Effective Piston Area sd 92 cm^2
Equivalent Volume Vas 20.1 ltrs
Sensitivity 2.83V/1m 85.9 dB

Power Handling
100h RMS noise test IEC 80 W
Long-term Max Power IEC 18.3 150 W
Short Term Max power IEC 18.2 200 W

Voice Coil and Magnet Parameters
Voice Coil Diameter 42 mm
Voice Coil Height 8 mm
Voice Coil Layers 4
Height of the Gap 20 mm
Linear Excursion +/- 9 mm
Max mech. excursion +/- 13 mm
Diameter of Magnet 90 mm
Height of Magnet 4 mm
Weight of Magnet 0.13 Kg