Scan-Speak Illuminator 4" Midrange - Paper Cone 4 ohm, 12MU/4731T00

Scan-Speak Illuminator 4" Midrange - Paper Cone 4 ohm, 12MU/4731T00

The Illuminator midranges and midwoofers are in every aspect unusual designs with
the open construction, the extremely long linear excursion and patented under-hung
SD-3 (Symmetrical Drive) neodymium motor system, which due to copper caps and its
construction ensures very low distortion, adding the unique patented cones, low-loss
linear suspension the result is: “The Very Best Money Can Buy”!

KEY FEATURES:
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 90dB @ 2,83V

T-S Parameters
Resonance frequency [fs] 64 Hz
Mechanical Q factor [Qms] 3.64
Electrical Q factor [Qes] 0.26
Total Q factor [Qts] 0.24
Force factor [Bl] 5.1 Tm
Mechanical resistance [Rms] 0.60 kg/s
Moving mass [Mms] 5.4 g
Suspension compliance [Cms] 1.15 mm/N
Effective diaph. diameter [D] 86 mm
Effective piston area [Sd] 58 cm²
Equivalent volume [Vas] 5.4 l
Sensitivity (2.83V/1m) 90 dB
Ratio Bl/√Re 2.92 N/√W
Ratio fs/Qts 264 Hz

Electrical Data
Nominal impedance [Zn] 4 P
Minimum impedance [Zmin] 4.3 P
Maximum impedance [Zo] 46.5 P
DC resistance [Re] 3.1 P
Voice coil inductance [Le] 0.11 mH

Power Handling
100h RMS noise test (IEC 17.1)* 80 W
Long-term max power (IEC 17.3)* 150 W
*Filter: 2. order HP Butterworth, 200 Hz

Voice Coil and Magnet Data
Voice coil diameter 32 mm
Voice coil height 6 mm
Voice coil layers 4
Height of gap 13 mm
Linear excursion ± 3.5 mm
Max mech. excursion ± 10 mm
Unit weight 0.8 kg