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3 (Symmetrical Drive) neodymium motor system, which due to copper caps and its
MIDRANGE 12MU/8731T00
The Illuminator midranges and midwoofers are in every aspect unusual designs with
the open construction, the extremely long linear excursion and patented under-hung
SDconstruction 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 87dB @ 2,83V
T-S Parameters
Resonance frequency [fs] 66 Hz
Mechanical Q factor [Qms] 3.63
Electrical Q factor [Qes] 0.31
Total Q factor [Qts] 0.29
Force factor [Bl] 6.1 Tm
Mechanical resistance [Rms] 0.54 kg/s
Moving mass [Mms] 4.7 g
Suspension compliance [Cms] 1.24 mm/N
Effective diaph. diameter [D] 86 mm
Effective piston area [Sd] 58 cm²
Equivalent volume [Vas] 5.8 l
Sensitivity (2.83V/1m) 87.2 dB
Ratio Bl/√Re 2.51 N/√W
Ratio fs/Qts 231 Hz
Notes:
IEC specs. refer to IEC 60268-5 third edition.
All Scan-Speak products are RoHS compliant.
Data are subject to change without notice.
Datasheet updated: February 22, 2011.
Electrical Data
Nominal impedance [Zn] 8 Ω
Minimum impedance [Zmin] 7.7 Ω
Maximum impedance [Zo] 75.0 Ω
DC resistance [Re] 5.9 Ω
Voice coil inductance [Le] 0.13 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 6.2 mm
Voice coil layers 4
Height of gap 13 mm
Linear excursion ± 3.4 mm
Max mech. excursion ± 11 mm
Unit weight 0.7 kg
N.C. Madsensvej 1 · 6920 Videbæk · Denmark · Phone: +45 6040 5200 · www.scan-speak.dk
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MIDRANGE 12MU/8731T00
Advanced Parameters (Preliminary)
Electrical data:
Resistance [Re'] 5.92 Ω
Free inductance [Leb] 0.0704 mH
Bound inductance [Le] 1.49 mH
Semi-inductance [Ke] 0.0766 SH
Shunt resistance [Rss] 4.21 Ω
Mechanical Data
Force Factor [Bl] 5.73 Tm
Moving mass [Mms] 4.98 g
Compliance [Cms] 0.928 mm/N
Mechanical resistance [Rms] 0.281 kg/s
Admittance [Ams] 0.149 mm/N
N.C. Madsensvej 1 · 6920 Videbæk · Denmark · Phone: +45 6040 5200 · www.scan-speak.dk